Facile Template Method Research Articles

Multi-shell bowl-like carbon microspheres for lightweight and broadband microwave absorption

Carbon materials have made significant progress in the field of microwave absorption (MA), but achieving wide effective absorption bandwidth (EAB) at low filler content still remains a great challenge. In this work, we design multi-shell bowl-like mesoporous carbon microspheres (MBMCs) by a facile hard template method for efficient MA. It is demonstrated that the spacing between inner and outer shell and second shell thickness play a vital role on the configuration of carbon microspheres. By controlling the second addition of silica template, the microstructure of carbon microsphere evolves from spherical to bowl shape geometry. Expanded shell spacing is beneficial for forming bowl-like microsphere. The dielectric loss and MA properties are highly associated with the configuration of MBMCs. Well-proportioned MBMCs with appropriate shell spacing present wide EAB of 7.3 GHz under a low filling ratio of 12 wt.%. This work paves a new way to broaden EAB and lower filling content of carbon materials via asymmetric multilayer microstructure design.

Lightweight, high-strength and fireproof borax-crosslinked graphene/hydroxyethyl cellulose hybrid aerogels fabricated via ice template method

In recent years, there has been a growing interest in fireproof nanomaterials due to their broad applications in fire-safety and environmental preservation. In this study, one kind of lightweight fireproof hybrid aerogel with low thermal conductivity (0.039 W/m•K) was prepared through a facile ice template method, where the graphene nanosheets and hydroxyethyl cellulose (HEC) are combined with borax crosslinkers. It was found that this aerogel can be not only recyclable and repairable, but also possesses excellent compressive strength and stiffness, owing to the interfacial van der Waals adsorption, ionic crosslinking and hydrogen bonding interactions. Remarkably, it has excellent flame retardancy performance (an extremely low peak heat release rate (PHRR) was measured to be 37.44 kW/m2, reduced by 88.6 % comparing to that of graphene/HEC aerogel). To further explore the fire resistance mechanism of this aerogel, the molecular dynamics simulation was performed. It reveals that the borax can effectively wrap and hinder the graphene and HEC molecules from decomposition. Besides, the borax can compact graphene and HEC closer, thereby further isolating heat and oxygen, realizing the fireproof property. This study offers valuable insights for designing advanced fireproof nanomaterials and applications in shipbuilding or construction.

The tune of shell numbers of multi-shell hollow mesoporous carbon microspheres for enhanced microwave absorption

The morphology of carbon nanomaterials plays significant effect on the complex permittivity and microwave absorption (MA) capability. Elaborate morphology design would bring about efficient MA performance. In this work, we develop a hollow mesoporous carbon microspheres with different shells (from single to quadruple shells) through a facile template method and layer-by-layer etching process. This multi-shell hollow mesoporous carbon microspheres (MS-HMCMs) can be regarded as a complex composite morphology consisting of hollow, mesoporous and yolk-shell structure, which presents the tunable number of shells for optimal impedance matching, multiple interfacial polarization and the extended microwave transmission path from internal spaces. Thus, the MS-HMCMs demonstrates wide effective absorption bandwidth (EAB) of 6.4 GHz and 5.96 GHz at the thicknesses of 2.5 mm and 3.0 mm. Besides, the complex permittivity and MA properties can be effectively tuned via regulating the shell numbers. This MS-HMCMs with controllable shells may be a promising wideband and lightweight microwave absorber.

Preparation of three-dimensionally interconnected sulfur-deficient MoS2/nitrogen-doped carbon composite via salt template method for separator modification in lithium–Sulfur batteries

Separator modification is a promising strategy with regard to lithium–sulfur batteries for trapping polysulfides and suppressing the involved shuttle effect. Herein, a sulfur-deficient molybdenum disulfide/nitrogen-doped carbon composite with an open and interconnected structure (IMoS2-x) was synthesized through facile salt template method using recrystallized salt powder. Unlike the two-dimensional sheet structure obtained through conventional salt template method, an effective three-dimensional IMoS2-x composite design can be achieved using small salt powder as a template. The prepared IMoS2-x-coated polypropylene separator (referred to as IMoS2-x/PP) exhibited remarkable electrochemical performances such as high initial discharge capacity of 1405.1 mAh/g and rate capability of 754.16 mAh/g at 0.1 and 3C, respectively. Furthermore, IMoS2-x/PP exhibited robust cycling performance of 911.18 mAh/g after 80 cycles at 0.2C under high sulfur loading and lean electrolyte conditions, with the electrolyte-to-sulfur ratio (E/S ratio) of 7.5 μL mg−1.

Biomimetic Electronic Skin for Robots Aiming at Superior Dynamic-Static Perception and Material Cognition Based on Triboelectric-Piezoresistive Effects.

Empowering robots with tactile perception and even thinking as well as judgment capabilities similar to those of humans is an inevitable path for the development of future robots. Here, we propose a biomimetic electronic skin (BES) that truly serves and applies to robots to achieve superior dynamic-static perception and material cognition functionalities. First, the microstructured triboelectric and piezoresistive layers are fabricated by a facile template method followed by selected self-polymerization treatment, enabling BES with high sensitivity and a wide detection range. Further, through laminated-independent triboelectric and piezoresistive parts for perceiving dynamic and static pressures simultaneously, the BES is capable of supporting the robot hand to monitor the entire process during object grasping. Most importantly, by further combining a neural network model, an intelligent cognition system is constructed for real-time cognition of the object material species via one touch of the robot hand under arbitrary pressures, which goes beyond the human cognition ability.

Lanthanide‐Containing Heteropolyoxomolybdate as Precursor to Porous Complex Oxides via Polymeric Micelle Assembly and Its Heterostructure with Carbon Dots for Anticounterfeiting Application

AbstractThe fabrication of porous complex oxides with intriguing opto‐functional properties remains a challenge that requires innovative synthetic strategies. In this work, a facile soft template method is developed based on stable micellar solutions formed with lanthanide‐containing heteropolyoxomolybdate and alkaline earth citrates as metal salt precursors and block copolymer as templates. The resulting structures exhibit an effective interfacial Förster resonance energy transfer (IFRET) between the porous CaMoO4:Eu3+ (CEMO) host and the embedded surface‐active carbon dots through the conjugated bonds between Ca2+/Mo6+ cations and the C═O functional groups. Such IFRET process extends of Eu3+ absorption band toward the UV and blue regions, enabling the proof‐of‐concept demonstration of multiresponsive anticounterfeiting codes. The study not only presents a new strategy to prepare porous lanthanide‐doped complex oxides but also provides a feasible way to achieve spectral regulation through interfacial interaction for multifunctional luminescent materials.

Dynamically assisted electrodeposition by hydrogen bubbles on carbonized wood: A NiFeCo nanoflower electrocatalyst for efficient hydrogen evolution

The development of cost-effective, simple, and highly active catalysts for electrochemical water splitting in alkaline electrolytes to produce renewable source H2 is critical to solve the environmental pollution and energy crisis. In this study, a series of nanoflower-like NiFeCo/CW catalytic electrodes were prepared by a facile one-step dynamic hydrogen bubble template (DHBT) method for electrodeposition on carbonized wood (CW), which have excellent HER performance. By reasonably investigating the effects of H+ concentration and time, a catalyst with ideal deposition results was obtained. In 1 M KOH solution, the prepared NiFeCo/CW-450 catalyst exhibits a small overpotential of 37 mV to achieve a current density of 10 mA cm−2, and still possess a satisfactory low overpotential when a larger current density is reached (η400 = 238 mV, η1000 = 298 mV). Furthermore, NiFeCo/CW can keep structure and catalytic performance stable after long-term test. The remarkable HER performance results from the unique nanoflower electrode structure that is uniformly dispersed on CW to fully expose the active site. As a result, this work will provide new inspiration and strategy for the preparation of novel simple, inexpensive and efficient electrocatalytic hydrogen evolution electrodes using earth-abundant resources.

Development of topology-optimized structural cavities macro-encapsulating chloride salt by gel-casting for high-temperature thermal energy storage

The thermal energy storage (TES) technology based on high-temperature molten salt is playing an increasingly important role in advanced solar energy utilization and waste heat recovery. However, the high corrosivity and low thermal conductivity of molten salt have limited the efficient application of TES systems. This work reports a facile and novel sacrificial paraffin template method, aiming to create Al2O3 ceramic macrocapsules with topology-optimized structural cavities by paraffin blocks with a reverse-designed structure for macro-encapsulating molten salt. The objective function of the maximum thermal conductivity of the design domain is calculated by a topology-optimized method to optimize the layout of high conductive ceramics. Among them, the optimized macrocapsules with a volume ratio of 25 % ceramic (S25) have a 62.8 % reduction in charging time and a 101.5 % increase in charging rate. Furthermore, after being filled with eutectic chloride salt, S25 could present a satisfactory heat storage density of 272.58 J∙g−1 and 748.3 J∙cm−3 at the temperature range of 550–750 °C. The macrocapsules also show good thermal cycling stability without degradation of thermophysical properties after hundred cycles. These improved results demonstrate the potential application of the macrocapsule in high-temperature TES systems.

Cobalt-nickel carbonate hydroxide composites achieving excellent electromagnetic absorption and wide bandwidth through incorporation with polypyrrole nanotubes

Electromagnetic absorption composite with prominent absorption properties and wider absorption bandwidth are in urgent desire. Polypyrrole-based composite is a prosperous candidate due to its easiness in synthesis, morphological diversity and controllable conductivity. In the present work, cobalt-nickel carbonate hydroxide (CCH) microwave absorption materials incorporating polypyrrole nanotubes (PNTs) in different loadings (CCH/PNTs) were prepared via a facile template method next to a hydrothermal treatment. The CCH is revealed in a sea-urchin-like morphology and PNTs are dispersed on the surface of the CCH. In light of the unique morphology, large specific surface area and interfaces, the CCH/PNTs composites exhibit excellent electromagnetic wave (EMW) absorption performance and extensive bandwidth of absorption. With a 180 mg loading of PNTs, the composite delivers a minimum reflection loss (RLmin) of − 57.4 dB with an effective absorption bandwidth (EAB) of 5.44 GHz. By tuning the matching thickness, a wide EAB larger than 7 GHz can be obtained in the X-band and Ku-band. The prominent EMW absorption properties can be ascribed to the dielectric loss, the polarization loss and multiple scattering attenuation from the large surfaces and interfaces from PNTs, and the optimization of impedance matching via CCH. The present research can offer an intuitive guide for the conception of microwave absorbers with wide absorption bandwidth.

Preparation, characterization, and magnetic resonance imaging of Fe nanowires

A facile template method was employed to synthesize Fe nanowires of different sizes, dimensions. Comprehensive analyses were conducted to explore their morphology, structure, composition, and magnetic properties. The surface of as-prepared Fe nanowires was modified with SiO2 by sol–gel method to improve the dispersion of as-prepared Fe nanowires in aqueous solution. Furthermore, the relaxation properties, biocompatibility and in vivo imaging abilities of the Fe@SiO2 nanowires were evaluated. The study revealed that the SiO2-coated Fe nanowires functioned effectively as transverse relaxation time (T2) contrast agents (CAs). Notably, as the length of the Fe@SiO2 nanowires increased, their diameter decreased, leading to a higher the transverse relaxivity (r2) value. Our study identified that among the Fe nanowires synthesized, the Fe3@SiO2 nanowires, characterized by a diameter of around 30 nm and a length of approximately 500 nm, exhibited the highest r2 value of 59.3 mM−1 s−1. These nanowires demonstrated good biocompatibility and non-toxicity. Notably, upon conducting small animal imaging a 1.5 T with Sprague–Dawley rats, we observed a discernible negative enhancement effect in the liver. These findings indicate the promising potential of Fe@SiO2 nanowires as T2 CAs, with the possibility of tuning their size for optimized results.

Efficient Self-Assembly Preparation of 3D Carbon-Supported Ti3 C2 Tx Hollow Spheres for High-Performance Potassium Ion Batteries.

MXenes are considered a promising negative electrode material for potassium ion batteries (PIBs) in view of their low potassium ion diffusion barrier and excellent electrical conductivity. However, the stacking phenomenon in practical applications severely reduces their active surface and leads to slow K+ diffusion. Herein, a facile composite template method is proposed to construct stacking-resistance 3D carbon-supported Ti3 C2 Tx (3D-C@Ti3 C2 Tx ) hollow spheres. Due to the unique structure, when used as a negative electrode material, as-prepared 3D-C@Ti3 C2 Tx hollow spheres show not only improved rate capability with 160.4 mAh g-1 at 100mA g-1 and 133.7 mAh g-1 at 500mA g-1 , but also stable cycling performance with 142.5 mAh g-1 specific capacity remained at 2 A g-1 after 4200 cycles. Furthermore, the full cells with 3D-C@Ti3 C2 Tx anode can operate stably for 1000 cycles at 100mA g-1 . Moreover, the linear fit analysis demonstrates that 3D-C@Ti3 C2 Tx hollow spheres have a fast and stable capacitive potassium storage mechanism. This method is simple and easy to implement, which provide a feasible path to solve the stacking problem of 2D materials.

Dual-functional single-atomic Mo/Fe clusters–decorated C3N5 via three electron-pathway in oxygen reduction reaction for tandemly removing contaminants from water

Inspired by the development of single-atom catalysts (SACs), the fabrication of multimetallic SACs can be a promising technical approach for the in situ electro-Fenton (EF) process. Herein, dual-functional atomically dispersed Mo-Fe sites embedded in carbon nitride (C3N5) (i.e., MoFe/C3N5) were synthesized via a facile SiO2 template method. The atomically isolated bimetallic configuration in MoFe/C3N5 was identified by combining the microscopic and spectroscopic techniques. The MoFe/C3N5 catalyst on the cathode exhibited a remarkable catalytic activity toward the three electron-dominated oxygen reduction reaction in sodium sulfate, leading to a highly effective EF reaction with a low overpotential for the removal of organic contaminants from wastewater. The new catalyst showed a superior performance over its conventional counterparts, owing to the dual functions of the dual-metal active sites. Density functional theory (DFT) analysis revealed that the dual-functional 50-MoFe/C3N5 catalyst enabled a synergistic action of the Mo-Fe dual single atomic centers, which can alter the adsorption/dissociation behavior and decrease the overall reaction barriers for effective organic oxidation during the EF process. This study not only sheds light on the controlled synthesis of atomically isolated catalyst materials but also provides deeper understanding of the structure-performance relationship of the nanocatalysts with dual active sites for the catalytic EF process. Additionally, the findings will promote the advanced catalysis for the treatment of emerging organic contaminants in water and wastewater.

Nitrogen/phosphorus co-doped carbon decorated with metallic zinc for high-performance potassium-ion batteries

Carbonaceous anodes of potassium-ion batteries (PIBs) hold sluggish adsorption and diffusion kinetics due to the large radius of K+, leading to poor cyclic stability and low specific capacity. Herein, an amorphous carbon material composed of N/P-doped active sites and trace amount of metallic zinc (Zn-NPC) is prepared through a facile self-sacrificing template method. Both experimental data and theoretical calculations indicate the co-doping of metallic zinc, and N/P atoms contribute to the low charge transfer impedance, high electronic conductivity, significant adsorption behavior, and remarkable diffusion kinetics of K+ ions. As a result, Zn-NPC anode delivers high capacity of 300.1 mA h g−1 at 50 mA g−1, and superior cycle performance with a reversible capacity of 196.1 mA h g−1 after 1400 cycles at 200 mA g−1. This work will open window for the doping strategy of carbon material and facilitate the practical application of PIBs in the energy storage field.

Bioinspired polydopamine nanosheets for the enhancement in anti-corrosion performance of water-borne epoxy coatings

The utilization of two-dimensional (2D) inorganic nanomaterials as nanofillers in the anticorrosion fields has garnered significant attention due to their exceptional barrier properties. However, uniform dispersion of nanofillers and good interfacial compatibility with organic coatings still remain a substantial challenge. Consequently, there is a need to explore novel and eco-friendly 2D nanomaterials for anticorrosive applications. In this study, two-dimensional polydopamine nanosheets (PDANS) were synthesized through a facile template method, and incorporated into water-borne epoxy (WEP) coating as green anticorrosive additives. Compared to WEP coating, the prepared PDANS/WEP coatings exhibited significantly enhanced corrosion protection performance, with a nearly 50% reduction in water uptake and a 22-fold increase in the |Z|f=0.01Hz value at a 0.5 wt% PDANS loading. These improvements can be attributed to the favorable interfacial compatibility between PDANS and WEP matrix, as well as the superior barrier properties of PDANS. Furthermore, local electrochemical impedance spectroscopy (LEIS) results demonstrated that the damaged PDANS/WEP coating provided enhanced corrosion protection by inhibiting steel corrosion through the chelating interaction between PDANS and steel, thereby reducing the coating delamination. Based on these findings, it can be inferred that PDANS hold great promise for the development of innovative anticorrosive coatings.

Facile In-Situ photocatalytic reduction of AuNPs on multilayer Core-Shell Fe3O4@SiO2@PDA magnetic nanostructures and their SERS application

Surface-enhanced Raman scattering (SERS) is a promising analytical technique for the rapid, sensitive, and repeatable detection in various SERS application fields. Herein, a new type of potential magnetically recyclable SERS substrate was designed and rapidly synthesized via a facile three-step template method. First, the magnetic ferroferric oxide (Fe3O4) cores were prepared by a convenient solvothermal approach, and coated with a thin layer of silica by a sol–gel process in order to improve their stability in complicated environments. Next, the negatively charged polydopamine (PDA)/K6[SiW11VIVO40]·7H2O (PDA/SiW11V) outer shell was assembled upon the magnetic Fe3O4@SiO2 core–shell nanoparticles via a layer-by-layer sequential adsorption process using the stickiness of PDA. The SiW11V multilayer shell can be used as the subsequent photocatalytic reduction precursors for the in-situ loading of high-density gold nanoparticles (AuNPs), without any other organic additives. The AuNPs decorated multilayer core–shell Fe3O4@SiO2@PDA magnetic nanostructures were employed as a potential magnetically recyclable SERS substrate, and showed excellent SERS performance. Using crystal violet (CV) as a model target, the as-fabricated AuNPs modified multilayer core–shell Fe3O4@SiO2@PDA magnetic nanostructures SERS substrates exhibited significant enhancement, and pushed the detection limit down to 10-12 M. Aside from the ultrahigh sensitivity, these SERS substrates also possess an excellent reproducibility (relative standard deviation (RSD) ∼ 8.3%), long-term stability (75 days), and unique chemical stability capability in different organic solvents and different environments with pH ≤ 10. Furthermore, a real-life application is also performed by the detection of melamine in spiked milk solution using the as-prepared magnetic nanostructures SERS-active substrates (limit of detection (LOD), 10-8 M). These results highlight that the rational design and controllable synthesis of multifunctional magnetic SERS substrates is a promising strategy in many different application fields such as biosensing, photoelectrocatalysis, and medical diagnosis.

Amine functionalized lignin-based mesoporous cellular carbons for CO2 capture

Amine-impregnated mesoporous carbon sorbents have been considered one of the most promising sorbents for CO2 capture from streams with low CO2 concentrations. In this work, a series of novel solid amine adsorbents were prepared by impregnating polyethyleneimine (PEI) on mesoporous carbons using low-cost bio-waste material “lignin” as a carbon precursor via a facile templating method. Our results demonstrated that the mesoporous carbon with 3D interconnected porous structure and large pore size and pore volume exhibited excellent CO2 adsorption capture of 2.90–3.13 mmol/g at a temperature operating window of 75–90 °C under CO2 partial pressure of 0.15 bar, being significantly higher than PEI impregnated sorbents prepared by using mesoporous carbon with 2D porous structures and also many amine-impregnated carbon-based sorbents reported in previous studies. The well-developed 3D interconnected mesoporous structure, high pore volume (up to 1.80 cm3/g), and large pore size permit the facile dispersion and immobilization of PEI within their pores and high availability of amine groups, which significantly improves both the CO2 adsorption capacity and kinetics. In addition, the cyclic adsorption–desorption test showed that the PEI-impregnated sorbents exhibit superior thermo-stability. These results indicate that the PEI-impregnated mesoporous adsorbents are promising ideal candidates for post-combustion CO2 capture. This work provide a potential strategy to prepare advancved amine impregnanted mesoporous carbons from lignin for efficient carbon capture.

Design of double-shelled NiS-FeS@NC hollow nanocubes for high-performance sodium-ion batteries

Mixed metal sulfides (MMSs) are highly noticeable as prospective materials for sodium storage due to their prominent electrochemical reversibility and excellent redox activity. Nevertheless, the fast capacity decay and poor rate capability hinder their application in sodium-ion batteries (SIBs). In this work, a facile template method, using Prussian blue analogue as the precursor, was employed to fabricate the double-shelled hollow structure with nitrogen (N)-doped carbon layer coated on the outer shell of NiS-FeS hollow nanocubes (NiS-FeS@NC). Specifically, the NiS-FeS@NC composite provides a glorious reversible capacity (395.8 mAh g−1 after 200 cycles at 1.0 A g−1) and superior rate capability (322.2 mAh g−1 at 5.0 A g−1) when employed as electrode material for SIBs. In addition, the designed NiS-FeS@NC= |Na3V2(PO4)2 @C full battery can maintain an excellent reversible capacity (68.7 mAh g−1 after 200 cycles at 1.0 A g−1) as well as robust cycling stability. The improvement of the sodium storage performance can be mainly attributed to the synergistic coupling of the N-doped carbon coating layer and the hollow nanostructure, which can effectively maintain the integrity of the nanocube structure and accelerate the transportation of electrons/ions, thus contributing to improving the electrochemical sodium storage performance. Importantly, the unique modification strategy reported in this paper, combining with the mechanism and kinetics revealing, is expected to provide insights for facilitating high-performance electrodes for SIBs.

A unique, flexible, and porous pressure sensor with enhanced sensitivity and durability by synergy of surface microstructure and supercritical fluid foaming

Flexible thermoplastic polyurethane (TPU)/multi-walled carbon nanotube (MWCNT) nanocomposite piezoresistive sensor with microsphere surface and internal porous structure were prepared using a facile glass template method combining with supercritical carbon dioxide (Sc-CO2) foaming process. Effects of surface microstructure and cell structure on the piezoresistive sensing performance of TPU/MWCNT nanocomposite foam had been investigated in detail: the novel hybrid structure significantly improved the sensing performance with a fast response time (≤100 ms), a wide operating range (0 ∼ 80 kPa) and a stability of over 1000 cycles. In addition, the prepared piezoresistive sensor can be used to monitor a wide range of human physiological signals (facial activity, small arm muscle contraction and arterial pulse, etc.) due to its excellent integrated sensing performance. This work provides a route for the design of advanced piezoresistive sensors that show great potential for applications in human motion detection, artificial intelligence devices, and medical detection, etc.

Lignin derived porous carbon with favorable mesoporous contributions for highly efficient ionic liquid-based supercapacitors

Lignin and its derivatives hold great potential in developing high performance porous carbon materials for supercapacitors due to the versatile features of high carbon content, abundant multifunctional groups, low cost, and environmental benefits. Unfortunately, their derived porous carbon generally has the features of unfavorable microporous-dominated morphologies and low specific surface area (SSA) attributed from the highly-branched structure of lignin, which are hardly suitable for the supercapacitors with ionic liquid (IL) electrolyte, leading to poor energy density and rate capability. Herein, porous carbon materials with desirable mesoporous contributions from sodium lignosulphonate are designed via a facile template method. Such rich mesoporisity carbon materials not only possess with three-dimensional interconnected network, large SSA, as well as favorable pore size distribution for accelerated ion and electron mass transfer, but also feature low heteroatom content for high electrochemical stability. Consequently, the optimal electrode exhibits a high capacitance of 166 F/g at 0.5 A/g, superior rate performance (59 Wh/kg at 59 kW/kg), as well as impressive cycle life with good capacitance retention of 93.1% in EMIBF4 electrolytes. The present work opens a new avenue to design porous carbon materials with high mesopore properties from lignin for effective compatibility with IL electrolyte in high-performance supercapacitors.

Constructing Carbon Nanobubbles with Boron Doping as Advanced Anode for Realizing Unprecedently Ultrafast Potassium Ion Storage

Carbonaceous material with favorable K+ intercalation feature is considered as a compelling anode for potassium‐ion batteries (PIBs). However, the inferior rate performance and cycling stability impede their large‐scale application. Here, a facile template method is utilized to synthesize boron doping carbon nanobubbles (BCNBs). The incorporation of boron into the carbon structure introduces abundant defective sites and improves conductivity, facilitating both the intercalation‐controlled and capacitive‐controlled capacities. Moreover, theoretical calculation proves that boron doping can effectively improve the conductivity and facilitate electrochemical reversibility in PIBs. Correspondingly, the designed BCNBs anode delivers a high specific capacity (464 mAh g−1 at 0.05 A g−1) with an extraordinary rate performance (85.7 mAh g−1 at 50 A g−1), and retains a considerable capacity retention (95.2% relative to the 100th charge after 2000 cycles). Besides, the strategy of pre‐forming stable artificial inorganic solid electrolyte interface effectively realizes high initial coulombic efficiency of 79.0% for BCNBs. Impressively, a dual‐carbon potassium‐ion capacitor coupling BCNBs anode displays a high energy density (177.8 Wh kg−1). This work not only shows great potential for utilizing heteroatom‐doping strategy to boost the potassium ion storage but also paves the way for designing high‐energy/power storage devices.