首页|A stretchable, asymmetric, coaxial fiber-shaped supercapacitor for wearable electronics

A stretchable, asymmetric, coaxial fiber-shaped supercapacitor for wearable electronics

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Fiber-shaped supercapacitors (FSCs),owing to their high-power density and feasibility to be integrated into woven clothes,have drawn tremendous attentions as a key device for flexible energy storage.However,how to store more energy while withstanding various types of mechanical deformation is still a challenge for FSCs.Here,based on a magnetron sputtering method,different pseudocapacitive materials are conformally coated on self-supported carbon nanotube aligned films.This fabrication approach enables a stretchable,asymmetric,coaxial fiber-shaped supercapacitors with high performance.The asymmetric electrode configuration that consists of CNT@NiO@MnOx cathode and CNT@Fe2O3 anode successfully extends the FSC's electrochemical window to 1.8 V in an aqueous electrolyte.As a result,a high specific capacitance of 10.4 F.cm-3 is achieved at a current density of 30 mA.cm-3 corresponding to a high energy density of 4.7 mWh·cm-3.The mechanical stability of the stretchable FSC is demonstrated with a sustainable performance under strains up to 75％ and a capacitance retention of 95％ after 2,000 cycles under 75％ strain.

fibersupercapacitorasymmetric configurationcoaxialmagnetron sputteringpseudocapacitive material

Hua Yuan、Guang Wang、Yuxing Zhao、Yang Liu、Yang Wu、Yuegang Zhang

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State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China

Tsinghua-Foxconn Nanotechnology Research Center, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

This work was financially supported by the National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

2016YFB0100100Nos.21433013U183221821975140

2020

纳米研究(英文版)

纳米研究(英文版)

CSTPCDCSCDSCIEI
ISSN：
年,卷(期)：2020.13(6)
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