Biomechanical Energy Harvesting Research Articles

Low-cost fabrication of the highly efficient triboelectric nanogenerator by designing a 3D multi-layer origami structure combined with self-charged pumping module

The explosive development of triboelectric nanogenerator (TENG) performance, with a simple structure and low cost, has become an excellent candidate for a primary self-powered source of portable modern-electronic devices. There are several approaches to booting TENG performance. However, some of them still encounter major challenges when fabricating a lightweight, flexible and scalable design. Herein, three main strategies; 1) structural design with 3D multi-layer Origami structure, 2) physical surface roughness modification, and 3) connection of a self-charge pumping module (SCPM) were selected and considered in terms of cheapness, light weight and scalability, with a simple manufacturing process. By optimizing these three strategies, the 3D multi-layer Origami TENG (O-TENG) can achieve an output performance of VOC~110 V and ISC~26 μA, which is 18 and 52 times higher than that for the non-optimized polyimide (PI) TENG, respectively. The output voltage demonstrates consistency and fast chargeability of ∼38 V saturation voltage within ∼8 s for a 0.22μF capacitor. The maximum of ~697 μW output power (P) could be provided at 10 MΩ. The number of origami layers (n) plays an important role in output performance, while integrating an SCPM module that accelerates chargeability of the device. Moreover, the cylindrical pocket energy harvesting device was designed to harvest biomechanical energy in daily life. One hundred and seventy light emitting diodes (LEDs) can be lit and the electric calculator driven easily. The proposed strategies have the potential for high-throughput fabrication of the low-cost TENG, and can be used simply as an alternative self-powered source for portable/wearable modern electronic devices.

Solvent-free adhesive ionic elastomer for multifunctional stretchable electronics

Intrinsically stretchable and transparent ionic conductors are of great interest due to their promising applications in flexible and wearable electronics. However, hydrogels/organogels based devices suffer from instability due to liquid evaporation or leakage. Herein, we present a solvent-free ionic elastomer (IE), featuring high transparency (>92%), stretchability (300%), ionic conductivity (0.07 mS/cm), adhesiveness (61 N/m), thermal stability (300 °C), and negligible mechanical hysteresis, which endows implementation capacity in multifunctional stretchable electronics. The IE-based robust strain sensors (both resistive and capacitive) show linear sensitivities in the range of 0–150% strain and long-term stability. Moreover, a reversible wide-range temperature sensor is presented showing remarkable sensitivity in the range of 30–55 °C sustained under 50% stretching. The temperature-strain effect on the IE-based sensor is insignificant, ensuring an accurate sensing capability. Thanks to its self-adhesiveness, a fully integrated, stretchable motion energy harvester as well as a skin-like thin triboelectric sensor array using IE as the electrode are further designed to demonstrate efficient human motion energy harvesting with a peak power density of 3.6 W/m2 and self-powered tactile sensing. The results provide strategies towards potential applications of developed IE in healthcare monitoring systems, biomechanical energy harvesting, soft robotics, and human-machine interfaces.

Transparent, stretchable and high-performance triboelectric nanogenerator based on dehydration-free ionically conductive solid polymer electrode

Stretchable energy harvesting sources that are comfortable to wear are urgently needed to power next-generation wearable electronics and Internet of Things (IoTs) devices. Herein we present a novel triboelectric nanogenerator (TENG) employing solid polymer electrolyte (SPE) as a stretchable and transparent electrode for the first time. The use of SPE endows the TENG with high stretchability, superb transparency, environmental stability, and enhanced electrical output. By combining phosphoric acid (H3PO4) with biocompatible polyvinyl alcohol (PVA), the resulting SPE achieves a stretchability of 1058% and ionic conductivity of 1.39 S m−1 due to the dual functions of H3PO4 as both the plasticiser and the ion-conductive charge carrier. The formation of an electrical double layer (EDL) between the ion-conducting SPE and the electron-conducting carbon tape dramatically increased the electric output and yielded a high open circuit voltage of 992 V, short circuit current of 44.8 μA and power density of 26 W m−2. Experimental and theoretical investigations reveal that the enhancing effect of EDL on TENG output is proportional to surface area of the double layer and hence the capacitance of SPE-TENG. More importantly, the SPE-TENG shows stable performance under ambient condition for long duration as it is free of the dehydration issue affecting other hydrogels-based ionic conductors. Furthermore, the SPE-TENG has been found to sustain high voltage output under large stretch, demonstrating robust energy harvesting even when the device undergoes large mechanical deformation. The potential of the newly developed SPE-TENG in harvesting biomechanical motion energy of human body is demonstrated for powering wearable electronics without external power supply. The stretchable SPE-TENG shows excellent energy harvesting capability and overcomes the liquid evaporation induced performance degradation in ion conducting hydrogels, suggesting very promising practical applications in stretchable energy harvesters and self-powered stretchable sensors.

High-performance keyboard typing motion driven hybrid nanogenerator

Keyboard is the most common input device in computer and human-machine interface devices. Each keystroke during keyboard typing provides a huge amount of biomechanical energy that can be converted into useful electrical energy. Herein, we propose a high-performance electromagnetic-triboelectric hybrid nanogenerator for harvesting biomechanical energy from keyboard typing motion (KTMEH). Combining the effects of electromagnetic induction and triboelectric contact electrification, the KTMEH can simultaneously scavenge mechanical energy from keystroke motion and deliver a maximum power of 7.04 mW from electromagnetic and 1.8 mW from the triboelectric unit, from a single Typewriter key. The output performances were analyzed for different typing speeds, typing force, and key shapes. For an average typing speed of 4 characters per second (CPS), the KTMEH can scavenge a power of 5.6 mW and 1.5 mW from the electromagnetic and triboelectric unit, respectively. This hybrid configuration and highly miniaturized design enable versatile energy harvesting capability from existing commercial keyboards along with facile installation and durability. From the experimental results, it was found that the harvesting typing motion energy is capable to charge the capacitor and drive commercial electronic loads such as a hygrometer. This work expresses notable advantages of hybrid nanogenerators to develop next-generation self-powered keyboards, self-powered keystroke dynamics monitoring and sensing systems, and security systems with biometric authentication. • A high-performance keyboard typing motion-driven hybrid nanogenerator is presented. • Contact-separation of nano-wires and nanowires improves triboelectric performance by six times. • A single key can deliver a maximum power of 7.04 mW from a single keystroke. • Output performance was analyzed for different typing speeds, typing force, and key shapes. • The proposed hybrid nanogenerator can be easily installed on commercial keyboards.

Integrated and shape-adaptable multifunctional flexible triboelectric nanogenerators using coaxial direct ink writing 3D printing

Triboelectric nanogenerators (TENGs), particularly those with high flexibility and sophisticated geometry, have shown great application foreground in portable and wearable electronics. However, traditional fabrication approaches remain complicated and non-versatile, which are also impractical in the preparation of complex shapes and structures. Herein, a one-pot coaxial direct ink writing (DIW) 3D printing technique has been proposed to fabricate a fully flexible single-electrode TENG (FFTENG) with sophisticated shapes and 3D structures for the purpose of harvesting and utilizing biomechanical energy. This FFTENG is made up of a silicone elastomer shell as the triboelectric layer and an inner silicone/carbon black (CB) core as the flexible electrode. Various factors that affect the output electric performance, including the ratio of the inner and outer diameter of the printed fiber, CB content, loading frequency, applied contact force, specimen size, and external load resistance, are investigated in detail via the contact-separation test. The results show that a standard square FFTENG with a size of 30 × 30 mm2 can yield an open-circuit voltage (Voc), a short-circuit current (Isc) and a short-circuit transferred charge (Qsc) of as high as 60 V, 0.23 μA and 58 nC, respectively, and a maximum output peak power density of 15.59 mW m−2 at a matched resistance of 80 MΩ. More importantly, various shape-adaptable FFTENGs can be designed and tailored to meet the diverse needs of different applications, such as self-powered LED systems, self-charging power systems, LED control devices, self-powered tactile sensors, flexible self-monitoring grip exercisers, and flexible self-powered keyboards, and open up new avenues for use in multifunctional self-powered electronic systems, including biomechanical energy harvesting and utilization, self-powered sensing and human-machine interaction.

Long-term in vivo operation of implanted cardiac nanogenerators in swine

Implantable nanogenerators (i-NG) provide power to cardiovascular implantable electronic devices (CIEDs) by harvesting biomechanical energy locally eliminating the need for batteries. However, its long-term operation and biological influences on the heart have not been tested. Here, we evaluate a soft and flexible i-NG system engineered for long-term in vivo cardiac implantation. It consisted of i-NG, leads, and receivers, and was implanted on the epicardium of swine hearts for 2 months. The i-NG system generated electric current throughout the testing period. Biocompatibility and biosafety were established based on normal blood and serum test results and no tissue reactions. Heart function was unchanged over the testing period as validated by normal electrocardiogram (ECG), transthoracic ultrasound, and invasive cardiac functional measures. This research demonstrates the safety, long term operation and therefore the feasibility of using i-NGs to power the next generation CIEDs.

Flexible and Extendable Honeycomb‐Shaped Triboelectric Nanogenerator for Effective Human Motion Energy Harvesting and Biomechanical Sensing

AbstractTriboelectric nanogenerator (TENG) is an attractive approach to power wearable electronic devices by harvesting energy from the environment. To further improve the electricity generation efficiency, a honeycomb‐shaped triboelectric nanogenerator (H‐TENG) with high spatial density and extendibility for human kinetic energy harvesting and motion monitoring is proposed. The honeycomb structure enables the H‐TENG to extend and stack along the required direction when in restricted space, which consequently achieves enhancive space utilization and power density promotion. 3D‐printed thermoplastic polyurethane as the elastic shell endows the H‐TENG with robust mechanical flexibility, high deformation, and advantageous fatigue resistance. In the output experiment, H‐TENG exhibits excellent electricity generation performance, that the maximum open‐circuit voltage and power density can reach 1500 V and 10.79 W m−2. In addition, the H‐TENG can not only light 252 white light‐emitting diodes with tapping, power the electronic watch and pedometer with walking, but also can maintain the sustainable running of the electronic thermometer. Moreover, H‐TENG manifests an extraordinary sensible response to the elbow bending of different angles and can estimate the walking speed from the frequency, demonstrating the potential of H‐TENG both as the biomechanical sensor and energy harvester of human movement.

Transparent and stretchable high-output triboelectric nanogenerator for high-efficiency self-charging energy storage systems

Rapid development in flexible and stretchable electronics poses the challenge for stretchable and multifunctional power devices. Here, we firstly report a fully-transparent and stretchable triboelectric nanogenerator (EC-TENG) based on edible grade silica gel (EGSG) and crystal mud (CM) to enable both biomechanical energy harvesting and human posture sensing. And We also invert a novel Na-ion battery based on FeSe 2 , which can realize the efficient storage of micro-electric energy. Under the hand with nitrile glove pressing frequency of 5 Hz, the short-circuit current ( I sc ), open-circuit voltage ( V oc ), and transfer charge of EC-TENG can reach 25.96 µA, 1400 V, and 150 nC, respectively. The maximum output power of EC-TENG can reach 7.84 mW with a match load of 40 MΩ. The EC-TENG device exhibits excellent stretchability and deformability under extreme conditions, including foldability, stretchability, distortion, and washability. Significantly, the EC-TENG can generate electricity by deforming itself and under non-contact conditions after friction with other triboelectric materials. From the experimental results, the EC-TENG can charge the Na-ion battery to 3 V in 13 h, and the electrical energy stored in the Na-ion battery can drive the temperature/humidity sensor. This design achieves the integration of power generation devices, sensor devices, and energy storage devices, and it will promote the development of all-in-one self-powered flexible wearable electronics. • We firstly proposed a transparent and stretchable triboelectric nanogenerator based on edible grade silica gel (EGSG) and crystal mud (CM) to enable both biomechanical energy harvesting and human posture sensing. • The EC-TENG device exhibits excellent stretchability and deformability under extreme conditions, including foldability, stretchability, distortion, and washability. • Significantly, the EC-TENG can generate electricity by deforming itself and under non-contact conditions after friction with other triboelectric materials. • We also invert a novel Na-ion battery based on FeSe2, which can realize the efficient storage of micro-electric energy. • This design achieves the integration of power generation devices, sensor devices, and energy storage devices, and it will promote the development of all-in-one self-powered flexible wearable electronics.

Natural polymers based triboelectric nanogenerator for harvesting biomechanical energy and monitoring human motion

Natural polymers based triboelectric nanogenerator for harvesting biomechanical energy and monitoring human motion

A Motion Capturing and Energy Harvesting Hybridized Lower-Limb System for Rehabilitation and Sports Applications.

Lower‐limb motion monitoring is highly desired in various application scenarios ranging from rehabilitation to sports training. However, there still lacks a cost‐effective, energy‐saving, and computational complexity‐reducing solution for this specific demand. Here, a motion capturing and energy harvesting hybridized lower‐limb (MC‐EH‐HL) system with 3D printing is demonstrated. It enables low‐frequency biomechanical energy harvesting with a sliding block‐rail piezoelectric generator (S‐PEG) and lower‐limb motion sensing with a ratchet‐based triboelectric nanogenerator (R‐TENG). A unique S‐PEG is proposed with particularly designed mechanical structures to convert lower‐limb 3D motion into 1D linear sliding on the rail. On the one hand, high output power is achieved with the S‐PEG working at a very low frequency, which realizes self‐sustainable systems for wireless sensing under the Internet of Things framework. On the other hand, the R‐TENG gives rise to digitalized triboelectric output, matching the rotation angles to the pulse numbers. Additional physical parameters can be estimated to enrich the sensory dimension. Accordingly, demonstrative rehabilitation, human‐machine interfacing in virtual reality, and sports monitoring are presented. This developed hybridized system exhibits an economic and energy‐efficient solution to support the need for lower‐limb motion tracking in various scenarios, paving the way for self‐sustainable multidimensional motion tracking systems in near future.

Fiber-shaped stretchable triboelectric nanogenerator with a novel synergistic structure of opposite Poisson's ratios

The rapid advancement of flexible and stretchable electronics has attracted intensive attention in recent decades. However, challenges still remain in developing wearable and sustainable power sources with comparable portability and stretchability. Here, a novel type of stretchable fiber-shaped triboelectric nanogenerator (AXF-TENG) was fabricated by inserting a negative Poisson-ratio auxetic fiber into a positive Poisson-ratio hollow circular sleeve, forming a synergistic structured TENG composed of opposite Poisson's ratios. Owing to the advanced structural designs, the inner auxetic fiber would expand in all directions to more effectively contact with the shrunk outer steel wire sleeve under stretching. The peak-to-peak voltage and transfer charge of composite based AXF-TENG could reach up to 42 V and 12.5 nC, respectively. The fabricated AXF-TENG can be used as a self‐powered multifunctional sensor to detect human motions and be woven into an energy‐harvesting fabric to scavenge biomechanical energy. With open-circuit voltage of 46 V and maximum instantaneous power density of 52.36 mW/m2, the AXF-TENG fabric was capable of lighting up 20 light emitting diodes (LEDs), charging commercial capacitors, powering an electronic watch and a calculator. All of these merits of the proposed AXF-TENGs suggest their promising potentials for versatile applications in biomechanical energy harvesting and self-powered sensing.

High-Performance Flexible Piezoelectric Nanogenerator Based on Specific 3D Nano BCZT@Ag Hetero-Structure Design for the Application of Self-Powered Wireless Sensor System.

With the popularity of portable and miniaturized electronic devices in people's live, flexible piezoelectric nanogenerators (PENG) have become a research hotspot for harvesting energy from the living environment to power small-scale electronic equipment and systems because of its stability. For further enhancing output performance of PENG, chemical modification and structural design for piezoelectric fillers are effective ways. Thus, the 3D porous hetero-structure fillers of BCZT@Ag are prepared by freeze-drying method and subsequent chemical seeding reduction. The silicone rubber as matrix is filled into the micro-voids of fillers to prepare specialized composite. The charge transport mechanism and stress transfer efficiency in PENG can be effectively improved through specialized design which is proven by experimental results and multi-physics simulations. The improved PENG exhibit a significantly enhanced output of 38.6V and 5.85 µA, which is 3.3 and 3.5 times higher than those of PENG without specific design. The prepared PENG can effectively harvest biomechanical energy through walk and joint bending of human body. Moreover, the PENG can be used as a trigger to remotely control wireless collision alarm system, which can acquire rapid response and shows great potential application in Internet of Things.

A recyclable triboelectric nanogenerator integrated into insole for sensing human motion

ABSTRACT Recently, researchers have produced a triboelectric nanogenerators (TENGs) technology that can harvest mechanical energy. However, the expensive fabrication materials still hinder its widespread. Thus, we propose a novel cost-effective TENG (N-TENG) by using the napkin to harvest biomechanical energy and sense the human motion. The N-TENG can obtain the short-circuit current (Isc) of 42.38 µA and the open-circuit voltage (Voc) of 363 V, respectively. As for the maximum output power of N-TENG with the size of (5 cm × 5 cm), it can reach 1.52 mW. Furthermore, the N-TENG integrated into the insole can detect the amount of perspiration of the foot to realize the physiological monitoring of the human body. This research not only greatly promoted the TENGs in mechanical energy harvesting but also the development of wearable electronics.

Stretchable, Stable, and Degradable Silk Fibroin Enabled by Mesoscopic Doping for Finger Motion Triggered Color/Transmittance Adjustment.

As a kind of biocompatible material with long history, silk fibroin is one of the ideal platforms for on-skin and implantable electronic devices, especially for self-powered systems. In this work, to solve the intrinsic brittleness as well as poor chemical stability of pure silk fibroin film, mesoscopic doping of regenerated silk fibroin is introduced to promote the secondary structure transformation, resulting in huge improvement in mechanical flexibility (∼250% stretchable and 1000 bending cycles) and chemical stability (endure 100 °C and 3-11 pH). Based on such doped silk film (SF), a flexible, stretchable and fully bioabsorbable triboelectric nanogenerator (TENG) is developed to harvest biomechanical energy in vitro or in vivo for intelligent wireless communication, for example, such TENG can be attached on the fingers to intelligently control the electrochromic function of rearview mirrors, in which the transmittance can be easily adjusted by changing contact force or area. This robust TENG shows great potential application in intelligent vehicle, smart home and health care systems.

Soft and transparent triboelectric nanogenerator based E-skin for wearable energy harvesting and pressure sensing

The demand for wearable sensor technologies has increased with the recent increase interactions humans–electronic device interactions. However, the supplying power for wearable sensors, such as E-skin and flexible electronics, remains a major technical challenge. Herein, we report a triboelectric nanogenerator (TENG)-based E-skin capable of biomechanical energy harvesting and self-pressure sensing without an external power source. PTFE-molded micro-patterned PDMS and a conductive yarn were combined to implement an E-skin with flexibility, elasticity, high sensitivity, and excellent stability. The manufactured E-skin generates a power of 154 mW m−2 for an external force of 1 kgf and exhibits stable characteristics without deterioration of output even under 4500 cycles of repeated pressure. The E-skin can charge a capacitor and drive an electronic watch as well as monitor physiological signals, such as arterial pulses. The method used in this study can be extended to potential applications for power supply in wearable/soft electronics, medical monitoring, and human–machine interfaces.

Autonomously Adhesive, Stretchable, and Transparent Solid‐State Polyionic Triboelectric Patch for Wearable Power Source and Tactile Sensor

AbstractRobust power supplies and self‐powered sensors that are extensible, autonomously adhesive, and transparent are highly desirable for next‐generation electronic/energy/robotic applications. In the work, a solid‐state triboelectric patch integrated with the above features (≈318% elongation, >85% average transmission, ≈44.3 N m−1 adhesive strength) is developed using polyethylene oxide/waterborne polyurethane/phytic acid composite (abbreviated as PWP composite) as an effective current collector and silicone rubber as tribolayer. The PWP composite is optimized systematically and corresponding single‐electrode device can supply a power density of 2.3 W m−2 at 75% strain. The triboelectric patch is capable of charging capacitors and powering electronics by efficiently harvesting biomechanical energies. Moreover, it can be autonomously attached to nonplanar skin or apparel substrates and used as a tactile sensor or an epidermal input touchpad for physiological motion detection and remote control of appliances, respectively. Even after dynamic deformation, tailoring, and prolonged use, the patch can maintain good stability and reliability of electrical outputs. This work provides a novel solid‐state and liquid‐free polyionic electrode‐based triboelectric nanogenerator integrated with adhesiveness, stretchability, and transparency, which can meet wide application needs from transparent electronics, artificial skins, to smart interfaces.

Interfacial Polarization and Dual Charge Transfer Induced High Permittivity of Carbon Dots‐Based Composite as Humidity‐Resistant Tribomaterial for Efficient Biomechanical Energy Harvesting

AbstractTribopositive, scalable, and biocompatible materials are highly desired for high‐performance triboelectric nanogenerators (TENGs). In this study, polyethylenimine (PEI) functionalized N‐doped carbon dots (NCDs‐PEI) are synthesized and a novel approach to develop high‐output TENGs by incorporating high permittivity NCDs‐PEI into polyvinyl alcohol (PVA) as the tribopositive composite (CPP composite) is proposed for the first time. By systematically manipulating the mass ratio of NCDs/PVA and PEI‐functionalized concentration, the optimized CPP composite‐based TENGs (CPP‐TENGs) reveal a remarkable enhancement in power density by 28.5 times as compared with pure PVA‐based TENGs. The considerable electric outputs of CPP‐TENGs can be attributed to the synergistic effect of interfacial polarization enhanced permittivity of CPP composite and boosted surface charge density induced by dual charge transfer pathways. Moreover, CPP‐TENGs present superior high‐output stability, durability, and humidity‐resistance, and can also effectively drive electronics at different humidity and monitor human body movements. This work renders a simple, feasible, and scalable pathway to boost the electrical performance of TENGs for biomotion energy harvesting as well as providing insights for exploiting novel tribomaterials in the development of high‐output TENGs.

A lightweight wearable biomechanical energy harvester

Human body energy harvesting has the potential to replace batteries to power wearable and mobile devices. However, the human body energy-harvester may impede human motion, be too heavy to carry, and increase the metabolic cost. In this paper, we present a lightweight device that generates electricity by harvesting energy from the negative muscle work of the human ankle and does not interfere with the natural motion of the human body. The energy harvester mounts on the leg and selectively engages to generate power in the terminal stance phase, during which the calf muscles are doing negative work. The engagement and disengagement are done by a simple but effective passive mechanism design. The modeling of the energy harvester was developed using the Lagrangian method and the energy-harvesting process was simulated to guide the device design, specifically choice between torsional stiffness, inertia, and damping terms for energy harvesting as well as human comfort. A test participant walking with the 100 g device on a treadmill at 4.8 km h−1 produced an average of 0.3 of electric power from the negative-muscle-work phase. Electromyography and torque measurement verified that the energy harvested comes from negative muscle work.

A Skin‐Inspired Triboelectric Nanogenerator with an Interpenetrating Structure for Motion Sensing and Energy Harvesting

AbstractRapid advancements in wearable electronics impose the challenge on power supply devices. Herein, a flexible single‐electrode triboelectric nanogenerator (SE‐TENG) that enables both human motion sensing and biomechanical energy harvesting is reported. The SE‐TENG is fabricated by interpenetrating Ag‐coated polyethylene terephthalate (PET) nanofibers within a polydimethylsiloxane (PDMS) elastomer. The Ag coating and PDMS are performed as the electrode and dielectric material for the SE‐TENG, respectively. The Ag‐coated PET nanofibers enlarge the electrode surface area, which is beneficial to increase sensing sensitivity. The flexible SE‐TENG sensor shows the capability of outputting alternating electrical signals with an open‐circuit voltage up to 50 V and a short‐circuit current up to 200 nA in response to externally applied pressure. It is used to sense various types of human motions and harvest electric energy from body motion. The harvested energy can successfully power wearable electronics, such as an electronic watch and light‐emitting diode. Therefore, the as‐prepared SE‐TENG sensor with a pressure response and self‐powered capability provides potential applications in wearable sensors or flexible electronics for personal healthcare and human–machine interfaces.

Dielectric Modulated Glass Fiber Fabric‐Based Single Electrode Triboelectric Nanogenerator for Efficient Biomechanical Energy Harvesting

AbstractSingle‐electrode triboelectric nanogenerators (SE‐TENGs) are versatile tools for energy harvesting with simple structures and great practicability. However, low output performance hinders SE‐TENGs in applications as portable power sources. Herein, a novel SE‐TENG that utilizes glass fiber fabric (GFF) as tribo‐materials, along with an inorganic ferroelectric film for the dielectric layer is proposed. The GFF is first shown to be a promising tribo‐material for its highly positive tribo‐polarity and unique chemical/mechanical/durable properties. Meanwhile, an inorganic dielectric film with high dielectric constant is introduced between the GFF and Al electrode for enhancing the charge trapping capability. Owing to the synergistic effect of optimized triboelectrification and dielectric properties, the specific designed SE‐TENG delivers an open‐circuit voltage of 1640 V and a short‐circuit current density of 59.05 mA m−2, which are superior to most reported SE‐TENGs. With a maximum instantaneous power of 11.30 mW, the device can light up 1350 light‐emitting diodes, charge a 47 µF capacitor into 10 V in 421 s, and power up a digital watch even without additional control circuits. This work provides new insights in designing high‐performance SE‐TENGs and facilitates their application in biomechanical energy harvesting and portable power sources.