High Conductivity Properties Research Articles

In situ formed LiF-Li3N interface layer enables ultra-stable sulfide electrolyte-based all-solid-state lithium batteries

Sulfide solid electrolytes are promising for high energy density and safety in all-solid-state batteries due to their high ionic conductivity and good mechanical properties. However, the application of sulfide solid electrolytes in all-solid-state batteries with lithium anode is restricted by the side reactions at lithium/electrolytes interfaces and the growth of lithium dendrite caused by nonuniform lithium deposition. Herein, a homogeneous LiF-Li3N composite protective layer is in situ formed via a manipulated reaction of pentafluorobenzamide with Li metal. The LiF-Li3N layer with both high interfacial energy and interfacial adhesion energy can synergistically suppress side reactions and inhibit the growth of lithium dendrite, achieving uniform deposition of lithium. The critical current densities of Li10GeP2S12 and Li6PS5Cl are increased to 3.25 and 1.25 mA cm−2 with Li@LiF-Li3N layer, which are almost triple and twice as those of Li-symmetric cells in the absence of protection layer, respectively. Moreover, the Li@LiF-Li3N/Li10GeP2S12/Li@LiF-Li3N cell can stably cycle for 9000 h at 0.1 mA cm−2 under 0.1 mA h cm−2, and Li@LiF-Li3N/Li6PS5Cl/Li@LiF-Li3N cell achieves stable Li plating/stripping for 8000 h at 0.1 mA cm−2 under 10 mA h cm−2. The improved dynamic stability of lithium plating/stripping in Li@LiF-Li3N/Li10GeP2S12 or Li6PS5Cl interfaces is proved by three-electrode cells. As a result, LiCoO2/electrolytes/Li@LiF-Li3N batteries with Li10GeP2S12 and Li6PS5Cl exhibit remarkable cycling stability of 500 cycles with capacity retentions of 93.5% and 89.2% at 1 C, respectively.

Self-Healing, Flexible and Smart 3D Hydrogel Electrolytes Based on Alginate/PEDOT:PSS for Supercapacitor Applications.

Hydrogel electrolytes for energy storage devices have made great progress, yet they present a major challenge in the assembly of flexible supercapacitors with high ionic conductivity and self-healing properties. Herein, a smart self-healing hydrogel electrolyte based on alginate/poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (alginate/PEDOT:PSS)(A/P:P) was prepared, wherein H2SO4 was employed as a polymeric initiator, as well as a source of ions. PEDOT:PSS is a semi-interpenetrating network (IPN) that has been used in recent studies to exhibit quick self-healing properties with the H₂SO₃ additive, which further improves its mechanical strength and self-healing performance. A moderate amount of PEDOT:PSS in the hydrogel (5 mL) was found to significantly improve the ionic conductivity compared to the pure hydrogel of alginate. Interestingly, the alginate/PEDOT:PSS composite hydrogel exhibited an excellent ability to self-heal and repair its original composition within 10 min of cutting. Furthermore, the graphite conductive substrate-based supercapacitor with the alginate/PEDOT:PSS hydrogel electrolyte provided a high specific capacitance of 356 F g-1 at 100 mV/s g-1. The results demonstrate that the A/P:P ratio with 5 mL PEDOT:PSS had a base sheet resistance of 0.9 Ω/square. This work provides a new strategy for designing flexible self-healing hydrogels for application in smart wearable electronics.

Enhanced ionic conductivity of sulfide solid electrolyte with high lithium content based on cryomilling

Considering the high ion conductivity and good machining properties of lithium thiophosphate (LPS), it has attracted increasing attention as a solid electrolyte for all-solid-state batteries. Chemical and thermal stability can be significantly enhanced by increasing lithium content. However, in past reports, the lithium content of LPS is commonly less than 40 %. LPS with high lithium content (Li > 40 at%) shows low ion conductivity and high grain boundary resistance. In the present work, LPS with 47.2 at% lithium was prepared by cryomilling and solid-state reaction, avoiding crystallization and adhesion in the ball milling process. By improving the ball milling process, the ion conductivity (1.36 mS/cm) and ion activation energy (10.80 kJ/mol) were optimized by 106.1 % and 41.5 %, respectively. The resulting all-solid-state battery showed a high capacity retention of 104 % after 100 cycles.

Wet-spinning of continuous hyaluronic-based MXene/CNTs hybrid fibers for flexible supercapacitor applications

Carbon nanotube (CNTs) fibers with high conductivity and excellent electrochemical properties are the most promising candidate materials for flexible supercapacitor electrodes. Utilizing the high energy storage characteristics of MXene materials, this paper designed and prepared the novel MXene/CNTs/HA hybrid fibers by wet spinning methods with sodium hyaluronate (HA) as the dispersant, and MXene and CNTs powder as main materials. The volumetric capacitance of obtained MXene/CNTs/HA hybrid fibers can reach 13.95 ± 2.45 F/cm3 and the retention rate of capacitance could remain 82 % after 1000 charge–discharge cycles. These results indicate that MXene/CNTs/HA hybrid fibers have great potential application in flexible supercapacitors and multi-functional electronic devices.

Realizing Scalable Nano-SiO2-Aerogel-Reinforced Composite Polymer Electrolytes with High Ionic Conductivity via Rheology-Tuning UV Polymerization.

Polymer electrolytes for lithium metal batteries have aroused widespread interest because of their flexibility and excellent processability. However, the low ambient ionic conductivity and conventional fabrication process hinder their large-scale application. Herein, a novel polyethylene-oxide-based composite polymer electrolyte is designed and fabricated by introducing nano-SiO2 aerogel as an inorganic filler. The Lewis acid-base interaction between SiO2 and anions from Li salts facilitates the dissociation of Li+. Moreover, the SiO2 interacts with ether oxygen (EO) groups, which weakens the interaction between Li+ and EO groups. This synergistic effect produces more free Li+ in the electrolyte. Additionally, the facile rheology-tuning UV polymerization method achieves continuous coating and has potential for scalable fabrication. The composite polymer electrolyte exhibits high ambient ionic conductivity (0.68 mS cm-1) and mechanical properties (e.g., the elastic modulus of 150 MPa). Stable lithium plating/stripping for 1400 h in Li//Li symmetrical cells at 0.1 mA cm-2 is achieved. Furthermore, LiFePO4//Li full cells deliver superior discharge capacity (153 mAh g-1 at 0.5 C) and cycling stability (with a retention rate of 92.3% at 0.5 C after 250 cycles) at ambient temperature. This work provides a promising strategy for polymer-based lithium metal batteries.

High rate lithium slurry flow batteries enabled by an ionic exchange Nafion composite membrane incorporated with LLZTO fillers

Lithium slurry flow batteries (LSFBs) possessing decoupled energy/power density feature and high energy density are considered as the most promising next-generation energy storage devices. However, their cycling stability is depressed by the high permeability of active components through porous separator and low conductivity of lithium ion in non-porous membrane. Herein, a novel Nafion/PVDF/LLZTO ion exchange membrane (IEM) with high ion conductivity and mechanical properties is proposed. As-optimized IEM possesses an ionic conductivity of 0.29 mS cm−1. Both experimental and density functional theory (DFT) calculation studies suggest that the complementary effect between inorganic ceramic fillers LLZTO and polymer materials favor the generation of new Li+ migration expressway and dehydrofluorination. The H-bonding interactions can successfully address the poor mechanical strength issues. Moreover, the sandwich-like structure by commercialized PE buffer layer will be beneficial to the improved stability and can effectively suppress the swelling effect of membrane in organic electrolyte. Consequently, LFP//LTO slurry cells containing PE/NPL3/PE membrane exhibit extraordinary performance under 0.3 C. Assembled slurry pouch cells could be cycled stably for more than 270 h at room temperature. This ingenious strategy of introducing inorganic ceramic fillers into the composite membrane will pave a novel promising direction to the development of LSFBs.

Enhanced mechanical properties and high electrical conductivity of copper alloy via dual-nanoprecipitation

Copper alloys are widely used as lead frames, electric contact wires and pantographs due to their high electrical conductivity and excellent mechanical properties. At present work, a medium electrical conductivity and excellent mechanical properties of Cu-Co-Si-Ti-Ce alloy was obtained by the vacuum melting process with the optimum performance of 225 HV, 702.5 MPa and 40.8% IACS aging at 500 °C for 60 min via the combinations of multiple strengthening. It can be inferred that the high-volume fraction of Goss, Brass, copper and S texture was one of the main reasons for the increase of micro-hardness by comparing the texture content at different conditions. Moreover, it was observed that Co 2 Si and Co 16 Ti 6 Si 7 phases exhibited coherent and semi-coherent interface relationships with the copper matrix, respectively, which can relieve the interfacial stress and reduce the interface energy by GPA analysis. Finally, the contributions of solid solution strengthening, work-hardening, grain boundary strengthening and precipitation strengthening were calculated, contributing most to the precipitation strengthening. • The Cu-Co-Si-Ti-Ce alloy obtained the excellent performance of 225 HV, 702.5 MPa and 40.8% IACS aging at 500 °C for 60 min. • The high volume fraction of Goss, Brass, copper and S texture was one of the main reasons for the increase of micro-hardness. • Co 2 Si and Co 16 Ti 6 Si 7 phases exhibited coherent and semi coherent interface relationships with the copper matrix.

Conductive hydrogels for tissue repair.

Conductive hydrogels (CHs) combine the biomimetic properties of hydrogels with the physiological and electrochemical properties of conductive materials, and have attracted extensive attention in the past few years. In addition, CHs have high conductivity and electrochemical redox properties and can be used to detect electrical signals generated in biological systems and conduct electrical stimulation to regulate the activities and functions of cells including cell migration, cell proliferation, and cell differentiation. These properties give CHs unique advantages in tissue repair. However, the current review of CHs is mostly focused on their applications as biosensors. Therefore, this article reviewed the new progress of CHs in tissue repair including nerve tissue regeneration, muscle tissue regeneration, skin tissue regeneration and bone tissue regeneration in the past five years. We first introduced the design and synthesis of different types of CHs such as carbon-based CHs, conductive polymer-based CHs, metal-based CHs, ionic CHs, and composite CHs, and the types and mechanisms of tissue repair promoted by CHs including anti-bacterial, antioxidant and anti-inflammatory properties, stimulus response and intelligent delivery, real-time monitoring, and promoted cell proliferation and tissue repair related pathway activation, which provides a useful reference for further preparation of bio-safer and more efficient CHs used in tissue regeneration.

Liquid metal-gel (LM-Gel) with conductivity and deformability

Via constructing hydrophilic polymer–metal binary cooperative LM-philic networks, LM-Gel with high conductivity and remolding properties was prepared.

Synthesis and characterization of reduced graphene oxidation from corn cob waste

Graphene is the latest carbon-based nanomaterial with wide applications and has superiority in electrical, thermal, and high conductivity properties. This study aims to synthesize and characterize reduced graphene oxide (rGO) from corncob waste using the modified Hummer method. which was carried out by removing the NaNo3 material. This synthesis used corncob waste that was made into charcoal with a particle size of 100 mesh with an oxidation time of 5 days. Structural analysis of rGO used Fourier Transform Infa Red (FTIR) and X-ray diffraction (XRD) testing. The results of FTIR testing showed a wave peak at 1568.82 cm-1 with C=C bonds which indicated that rGO was formed. The XRD test results showed a diffractogram peak at an angle of 2θ ~ 24.6635 which is typical of rGO materials.

Construction of Nitrogen-abundant Graphyne Scaffolds via Mechanochemistry-Promoted Cross-Linking of Aromatic Nitriles with Carbide Toward Enhanced Energy Storage.

The 2D graphyne-related scaffolds linked by carbon-carbon triple bonds have demonstrated promising applications in the field of catalysis and energy storage due to their unique features including high conductivity, permanent porosity, and electron-rich properties. However, the construction of related scaffolds is still mainly limited to the cross-linking of CaC2 with multiple substituted aromatic halogens and there is still a lack of efficient methodology capable of introducing high-concentration heteroatoms within the architectures. The development of alternative and facile synthesis procedures to afford nitrogen-abundant graphyne materials is highly desirable yet challenging in the field of energy storage, particularly via the facile mechanochemical procedure under neat and ambient conditions. Herein, graphyne materials with abundant nitrogen-containing species (nitrogen content of 6.9-29.3wt.%), tunable surface areas (43-865m2 g-1 ), and hierarchical porosity are produced via the mechanochemistry-driven pathway by deploying highly electron-deficient multiple substituted aromatic nitriles as the precursors, which can undergo cross-linking reaction with CaC2 to afford the desired nitrogen-doped graphyne scaffolds efficiently. Unique structural features of the as-synthesized materials contributed to promising performance in supercapacitor-related applications, delivering high capacitance of 254.5Fg-1 at 5mVs-1 , attractive rate performance, and good long-term stability.

Mechanically Robust and Highly Conductive Ionogels for Soft Ionotronics

AbstractIonogels are promising materials for flexible electronics due to their continuous conductive phase, high thermal and chemical stability. However, a large amount of ionic liquid is required to get high conductivity, resulting in a sharp decline in the mechanical properties. Therefore, it is a great challenge to prepare ionogels with both high conductivity and mechanical properties, which is important for their practical applications. Herein, ionogels with high mechanical strength and stretchability, extraordinary ionic conductivity, excellent transparency, outstanding durability, and stability are fabricated with crosslinked polymer, ionic liquid, and lithium salt. The adoption of lithium salt can significantly improve both the mechanical strength and stretchability, which is a common dilemma in material science, and simultaneously, address the conflict between mechanical strength and ionic conductivity in ionogels. It is primarily corresponding to the microphase‐separation effects induced by the lithium bonds formed between lithium ions and carbonyl groups on the polymer networks. Ionotronics including resistance‐type sensors for strain and temperature sensing and triboelectric nanogenerators with stable output performance are fabricated. Moreover, ionogel‐based microcircuit and sensing arrays with high resolution and accuracy are fabricated through digital light processing printing technology. The ionogels have great promise for various ionotronics in many fields.

Enhancing the Moisture Stability and Electrochemical Performances of Li6PS5Cl Solid Electrolytes through Ga Substitution

Sulfide solid electrolytes are attracting much attention as a next-generation electrolyte material due to their high ionic conductivity and appropriate mechanical properties. Among them, Li-argyrodite exhibits ultrahigh Li-ion conductivity and has the possibility of process expansion, so it is a material that has been extensively studied in academia and industry. However, due to the high reactivity of S and the weak P-S bond, there are electrochemical and air stability issues, such as undesirable reactions at the interface with the active material in the composite electrode during charge/discharge cycling and reacting readily with moisture in the atmosphere. Herein, we report solid-electrolyte with the composition Li6+2xGaxP1-xS5Cl (x = 0, 0.013, 0.025, 0.038, 0.05, 0.075) in which P is substituted with softer acid Ga, based on Hard and Soft Acids and Bases (HSAB) theory. In the half-cell charge/discharge experiment using synthesized electrolytes for cathode composite, the cell using Li6.1Ga0.05P0.95S5Cl shows a higher capacity retention rate after 50 cycles, and XPS analysis confirmed that lower electrolyte decomposition compared to the cell using Li6PS5Cl. This demonstrates that the electrochemical stability of the solid electrolyte is improved with Ga substitution. Further, the dry air exposure test confirms that the air stability of Li6PS5Cl is increased by Ga substitution. Finally, the Cyclic Voltammetry (CV) tests show that Ga-substitution enhanced the stability against Li-metal.

CuxCo3-xO4-δ (0≤x≤1) coatings for solid oxide fuel cell interconnect applications

In order to obtain the solid oxide fuel cell (SOFC) interconnect coatings with high electrical conductivity, satisfactory protectiveness, and well-fitting thermal expansion, a series of CuxCo3-xO4-δ (x = 0, 0.5, 0.8, and 1.0) coatings are prepared by supersonic spraying via subsequent sintering. The chemical composition, lattice and morphological structures, electrical properties, and thermal expansion are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), area-specific resistance (ASR), and coefficient of thermal expansion (CTE) measurements. The experimental results show that the formation of CuCo2O4 is a reversible and incomplete reaction at the elevated temperature, and the coexistence of CuO, Co3O4, and CuCo2O4 is inevitable in the coatings. The concentration of the chemicals mentioned above is highly related to the coatings’ Cu:Co molar ratio. The correlation between the chemical composition and the properties is comprehensively studied in this research. The CuxCo3-xO4-δ coatings exhibit good electrical conductivity when 0 ≤ x ≤ 0.8, satisfactory protectiveness when 0.5 ≤ x ≤ 1.0, and fitting CTE with remarkable robustness through the quick heating-cooling cycles when 0.8 ≤ x ≤ 1.0. In general, Cu0.8Co2.2O4-δ can be an appropriate candidate to meet the advancing interconnect coating demands with high electrical conductivity, satisfactory protectiveness, and well-fitting thermal expansion properties.

Multi-Beam Conformal Array Antenna Based on Highly Conductive Graphene Films for 5G Micro Base Station Applications.

Recently, micro base station antennas have begun to play a more important role in 5G wireless communication, with the rapid development of modern smart medical care, the Internet of things, and portable electronic devices. Meanwhile, in response to the global commitment to long-term carbon neutrality, graphene film has received significant attention in the field of antennas due to its low carbon environmental impact and high electrical conductivity properties. In this work, a conformal array antenna based on highly conductive graphene films (CGF) is proposed for 5G millimeter-wave (MMW) applications. The proposed antenna consists of three antenna arrays, with eight patch elements in each array, operating at 24 GHz, with linear polarization. Each antenna array's current amplitude distribution coefficient is constructed by synthesizing a series-feeding linear array using the Chebyshev method. The measurement results demonstrated that the proposed CGF antenna exhibits a peak realized gain higher than 8 dBi in the bandwidth of 23.0-24.7 GHz. The proposed antenna achieves three independent beams from bore-sight to ±37° in conformal installations, with a cylinder radius of 30 mm, showing excellent beam-pointing performance. These characteristics indicate that the CGF can be used for the design of MMW micro base station antennas, fulfilling the requirements of the conformal carrier platform for a lightweight and compact antenna.

Imidazolium-Type Poly(ionic liquid) Endows the Composite Polymer Electrolyte Membrane with Excellent Interface Compatibility for All-Solid-State Lithium Metal Batteries.

Developing a poly(ethylene oxide) (PEO)-based polymer electrolyte with high ionic conductivity and robust mechanical property is beneficial for real applications of all-solid-state lithium metal batteries (ASSLMBs). Herein, an excellent organic/inorganic interface compatibility of all-solid-state composite polymer electrolytes (CPEs) is achieved using a novel imidazolium-type poly(ionic liquid) with strong electrostatic interactions, providing insights into the achievement of highly stable CPEs. The key properties such as micromorphologies, thermal behavior, crystallinity, tLi+, mechanical property, lithium anode surficial morphology, and electrochemical performance are systematically investigated. The combined experimental and density functional theory (DFT) simulation results exhibit that the strong electrostatic interaction and ion-dipole interaction cooperated to improve the compatibility of the CPE, with a high ionic conductivity of 1.46 × 10-4 S cm-1 at 40 °C and an incredible mechanical strain of 2000% for dendrite-free and highly stable all-solid-state LMBs. This work affords a promising strategy to accelerate the development of PEO-based polymer electrolytes for real applications in ASSLMBs.

Electrochemical strategy based on the synergistic effect of ZIF-8 and MWCNTs for quantitation of tert-butylhydroquinone in oils and fried chips

A facile, ultra-sensitive and cost-effective electrochemical sensor was successfully prepared by combining metal–organic framework ZIF-8 with MWCNTs-COOH, which detecting of tert-butylhydroquinone (TBHQ) in edible oil and fried foods. The hydrothermally synthesized ZIF-8 material with microporous structure was demonstrated to have large specific surface area, and together with the MWCNTs-COOH with high electrical conductivity and catalytic properties, was used as a modified substrate for electrodes. Because of the synergistic effect between ZIF-8 and MWCNTs-COOH, the modified electrode exhibited significant electrocatalytic ability for TBHQ. Under the optimal experimental conditions, the ZIF-8/MWCNTs-COOH modified electrode obtained good linearity when the TBHQ concentration ranged from 0.01 to 25.0 μg mL−1 with the LOD (limit of detection) of 0.009 μg mL−1 (S/N = 3). Moreover, the constructed electrochemical sensor exhibits better anti-interference capability, reproducibility and stability, and can be used to monitor the content of TBHQ in oil and fried foods.

Absorption-polymerization method for synthesizing phase change composites with high enthalpy and thermal conductivity for efficient thermal energy storage

Phase change materials (PCMs) are extensively used in passive thermal management and heat storage owing to their high latent heats near phase change temperatures. However, low thermal conductivity and leakage are two persistent bottlenecks in applications of PCMs. In this study, a new absorption-polymerization method is proposed to prepare phase change composites (PCCs) with both high thermal conductivity, high enthalpy, high encapsulation ratio, and leakage-proof property. The PCCs are synthesized in two steps: (1) absorption: n-hexadecane (C16) and methyl methacrylate (MMA) are absorbed into expanded graphite (EG) network; (2) polymerization: the absorbed MMA is subsequently polymerized to encapsulate C16 and form core-shell microcapsules in the EG networks. The PCCs exhibit latent heats of 170–200 J/g, encapsulation ratios of 72–85%, and thermal conductivities of 0.8–3.9 W/(m·K). In addition, the PCCs exhibit good dynamic response and long-term cycle stability. The absorption-polymerization process is an efficient and cost-effective method of synthesizing high-performance PCCs, which is promising for various heat-related applications, such as heat collection for renewable energy, energy conservation in buildings, and thermal protection of electronic equipment. • An novel absorption-polymerization method is proposed to prepare EG/PMMA/C16 PCCs. • The PCCs exhibit both macroscopic and microscopic encapsulation structure. • The PCCs have high thermal conductivity, high enthalpy and leakage-proof property. • The PCCs have good dynamic response and long-term cyclic stability.

Branched polybenzimidazole / polymeric ionic liquid cross-linked membranes with high proton conductivity and mechanical properties for HT-PEM applications

Branched polymers have unique three-dimensional dendritic structures, so they have received a lot of attention in the application of high temperature proton exchange membranes. In this work, we synthesize BOPBI-X (X = 3%, 6%, 9%) membranes with different branched ratios based on the synthesis of OPBI, due to the introduction of a rigid triazine structure with a larger free volume, the membranes could absorb more phosphoric acid (PA) while maintaining sufficient mechanical strength. Among them, the BOPBI-6% membrane obtains splendid comprehensive performance, when the PA doping level (ADL) is 9.55, it achieves a proton conductivity of 99.2 mS cm−1 at 180 °C, which is 1.8 times higher than OPBI (54.8 mS cm−1), and it performs well in long-term oxidation stability test after 144 h, it still has a mass retention rate of 90%. For the sake of further boost the performance of the membrane, cross-linkable polymeric ionic liquid (PIL) is introduced to the system. Among them, BOPBI-PIL-30% membrane has sufficient mechanical properties (5.50 ± 0.8 MPa), and the proton conductivity (146.9 mS cm−1) at 180 °C is also excellent, so BOPBI-PIL-30% membrane is expected to be a promising candidate as HT-PEMs.

Flexible Actuator Based on Conductive PAM Hydrogel Electrodes with Enhanced Water Retention Capacity and Conductivity

Conductive polyacrylamide (PAM) hydrogels with salts that act as electrolytes have been used as transparent electrodes with high elasticity in flexible electronic devices. Different types and contents of raw materials will affect their performance in all aspects. We tried to introduce highly hydratable salts into PAM hydrogels to improve their water retention capacity. Different salts can improve the water retention capacity of PAM hydrogels to a certain extent. In particular, PAM hydrogels containing higher concentrations of lithium chloride (LiCl) and calcium chloride (CaCl2) showed an extremely strong water retention capacity and could retain about 90% and more than 98% of the initial water in the experimental environment at a temperature of 25 °C and a relative humidity of 60% RH, respectively. In addition, we conducted electrical conductivity tests on these PAM hydrogels with different salts. The PAM hydrogels containing LiCl also show outstanding conductivity, and the highest conductivity value can reach up to about 8 S/m. However, the PAM hydrogels containing CaCl2, which also performed well in terms of their water retention capacity, were relatively common in terms of their electrical conductivity. On this basis, we attempted to introduce single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs), and graphene (GO) electronic conductors to enhance the electrical conductivity of the PAM hydrogels containing LiCl. The conductivity of the PAM hydrogels containing LiCl was improved to a certain extent after the addition of these electronic conductors. The highest electrical conductivity was about 10 S/m after we added the SWCNTs. This experimental result indicates that these electronic conductors can indeed enhance the electrical conductivity of PAM hydrogels to a certain extent. After a maximum of 5000 repeated tensile tests, the conductive hydrogel samples could still maintain their original morphological characteristics and conductivity. This means that these conductive hydrogel samples have a certain degree of system reliability. We made the PAM conductive hydrogels with high water retention and good conductivity properties into thin electrodes and applied them to an electric response flexible actuator with dielectric elastomer as the functional material. This flexible actuator can achieve a maximum area strain of 18% under an external voltage of 10 kV. This new composite hydrogels with high water retention and excellent conductivity properties will enable more possibilities for the application of hydrogels.