Hierarchically Structured Three-Dimensional Carbon-Based Integrated Electrodes with Enhanced Pseudocapacitance and Deformability  

作　　者：Bo-Hao Xiao Wei-Jie Cai Pei-Yuan Wu Kang Xiao Zhao-Qing Liu 

机构地区：[1]Guangzhou Key Laboratory for Clean Energy and Materials,Institute of Clean Energy and Materials,School of Chemistry and Chemical Engineering,Guangzhou 510006

出　　处：《Renewables》2023年第2期227-238,共12页可再生能源（英文）

基　　金：National Natural Science Foundation of China(grant nos.21805051 and 21875048);Outstanding Youth Project of Guangdong Natural Science Foundation(grant no.2020B1515020028);University Innovation Team Scientific Research Project of Guangzhou Education Bureau(grant no.202235246);Science and Technology Research Project of Guangzhou(grant nos.202102020376 and 202201020214);Guangdong University Student Science and Technology Innovation Climbing Program(grant no.pdjh2022b0415);2022 Innovation Training Program for College Students(grant no.s202211078133).

摘　　要：Compressible supercapacitors play an increasingly significant role in flexible sensors and wearable electronic devices.However,the integration of mechanical compressibility and excellent electrochemical performance into a single device remains a challenge.Herein,we demonstrate a compressible and high-performance supercapacitor based on an N-doped carbon foam elastomer with hierarchical carbon nanotubes.Hierarchically structured Fe3C@N-doped carbon nanotubes/N-doped carbon foam and Ni@N-doped carbon nanotubes/N-doped carbon foam have been synthesized via a simple and universal self-catalytic strategy.The hierarchical structural features of self-catalytic N-doped carbon nanotubes serve as a cushion when the composite is subjected to an external force,exhibiting excellent mechanical properties with a maximum compressive strain of 80%and fatigue resistance of 1000 cycles.Moreover,the different electroactive potentials of the transition-metal species in the composites provide the assembly with a maximum operating voltage of 1.4 V,which shows a maximum energy density of∼10.74 Wh kg^(−1)(0.084 mWh cm^(−3))at the power density of∼179.2 W kg^(−1)(1.4 mWh cm^(−3)),and retains 88.4%of the original capacitance after 20,000 charge–discharge cycles,even at a strain of 80%.This work paves the way for controllable fabrication of compressible electrodes and supercapacitors.

关 键 词：compressible supercapacitors hierarchical structure self-catalytic N-doped carbon nanotubes N-doped carbon foam PSEUDOCAPACITANCE 

分 类 号：TM53[电气工程—电器]