Constructing high-performance electrodes with both wide potential window (e.g.≥ 2 V in aqueous elec-trolyte) and excellent mechanical flexibility represents a great challenge for supercapacitors.Because of the outstanding conductivity and flexibility,carbon cloth (CC) has shown unlimited prospects for con-structing flexible electrodes,but is rarely used directly as electrode material due to its electrochemical inertness and small specific surface area.To tackle these two critical limitations,we design a novel redox-etching strategy to synthesize CC-based electrode with 3D interconnecting pore structure.The sponge-like highly porous CC was further activated by strong oxidant to form abundant oxygenic groups,which occupy the interior and surface of current collector to render substantial pseudocapacitance.The as-synthesized CC electrode yielded an impressive capacitance of 4035 mF cm-2 at 3 mA cm-2 and sat-isfying cycling durability in a wide potential range of-1-1 V vs.SCE,which surpass the majority of reported CC-based electrodes.A symmetric supercapacitor with stable voltage of 2 V is assembled and delivers remarkable energy density of 6.57 mWh cm-3.Significantly,the device demonstrates an unpar-alleled flexibility with no capacitive decay after 100 bending cycles.This facile chemical etching and post-treatment processes are designed for large-scale manufacturing of the CC electrodes by providing high surface area and abundant electrochemically active sites,promising for industry application.The innova-tive synthetic strategy opens up new opportunities for high-performance flexible energy storage.

Institute of Clean Energy Chemistry,Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province,College of Chemistry,Liaoning University,Shenyang 110036,Liaoning,China;Centre for Translational Atomaterials,School of Science,Swinburne University of Technology,Hawthorn,VIC 3122,Australia

[1]Xu Han;Zi-Hang Huang;Fanjin Meng;Baohua jia;Tianyi Ma-.Redox-etching induced porous carbon cloth with pseudocapacitive oxygenic groups for flexible symmetric supercapacitor)[J].能源化学,2022(01):136-143

interconnecting,isfying,unpar,alleled

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