The design of flexible composite electrodes has become the top priority in energy storage devices for the development of future wearable intelligent electronics.However,searching for fully integrated,ultrathin flexible composite electrodes with satisfying electrochemical per-formance is still a major challenge.Herein,we introduce a nanoporous gold metallic glass(MG)ribbon-based com-posite electrode with excellent electric conductivity,mechanical flexibility,and extra capacitance by integrating polypyrrole(PPy)into wrinkled nanoporous ribbon(NPG@MG).The"freestanding,ultrathin,highly con-ductive and flexible"nature of the composite electrode prevents the conducting polymer from structural instability resulting from the volume swell and shrink during the charging/discharging circulation,and the packed PPy pro-vides protection for the wrinkled topology on the surface of the MG ribbon.The capacitance of pure NPG@MG-PPy composite electrode reached 393 mF·cm-2.The ultra-thin all-solid-state flexible supercapacitor demonstrates an excellent capacitance of 172 mF·cm-2(14.8 F·cm-3),accompanied by a superior cycling capability after 8000 charge/discharge cycles attributed to mechanical flexibility.The areal energy density also reached 0.74 mWh·cm-3(9μWh·cm-2)at a power density of 1 μW·cm-2.This work provides valuable concepts on the design of PPy-based hybrid materials for flexible energy storage systems with greatly enhanced electrochemical performances.

Yi Xu;Pak Man Yiu;Yu-Kun Wang;Xiao-Meng Qin;Tamaki Shibayama;Seiichi Watanabe;Masato Ohnuma;Da-Zhu Chen;Hua Cheng;Chan-Hung Shek;Zhou-Guang Lu;Chen Liu

Guangdong Research Center for Interfacial Engineering of Functional Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong 999077,China;Division of Quantum Science and Engineering,Faculty of Engineering,Centre for Advanced Research of Energy and Materials,Hokkaido University,Sapporo 0608628,Japan;Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518060,China

稀有金属（英文版）

[1]Yi Xu;Pak Man Yiu;Yu-Kun Wang;Xiao-Meng Qin;Tamaki Shibayama;Seiichi Watanabe;Masato Ohnuma;Da-Zhu Chen;Hua Cheng;Chan-Hung Shek;Zhou-Guang Lu;Chen Liu-.Highly flexible,mechanically strengthened metallic glass-based composite electrode with enhanced capacitance and cyclic stability)[J].稀有金属（英文版）,2022(11):3717-3728

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