High-performance aqueous asymmetric supercapacitors based on the cathode of one-step electrodeposited cracked bark-shaped nickel manganese sulfides on activated carbon cloth  

作　　者：ADIL Emin XIE WenLu LONG Xiao WANG Xiao SONG XiaoQiang CHEN Yue FU YuJun LI JunShuai LI YaLi HE DeYan 

机构地区：[1]Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education,and School of Materials&Energy,Lanzhou University,Lanzhou 730000,China

出　　处：《Science China(Technological Sciences)》2022年第2期293-301,共9页中国科学（技术科学英文版）

基　　金：supported by the Natural Science Foundation of Gansu,China(Grant No.20JR10RA611)。

摘　　要：In this work,we report a high-performance self-standing supercapacitor electrode of mixed nickel manganese sulfides (NMSs)with a cracked-bark shape grown by one-step electrochemical deposition on activated carbon cloth (ACC).The electrode possesses outstanding electrochemical properties,including a high specific capacitance of up to 3142.8 F g^(-1)at 1.0 A g^(-1),the high-rate performance (~1206.8 F g^(-1)at 60.0 A g^(-1)),and cycle stability (~92.3%capacitance retention after 8000 cycles at8 A g^(-1)).An asymmetric supercapacitor assembled using NMSs on ACC as the cathode,activated carbon on carbon cloth as the anode and 1.0 mol L;KOH as the electrolyte delivers a high energy density of 111.2 W h kg^(-1)at 800.0 W kg^(-1)and the prominent cycling performance of~93.2%capacitance retention after 10000 cycles at 5 A g^(-1)with the Columbic efficiency of around 100%during these 10000 cycles.The high performance and facile preparation indicate that the NMSs on ACC hold a huge potential as the electrode for supercapacitors.

关 键 词：aqueous asymmetric supercapacitors nickel manganese sulphides high specific capacitance high energy density long cycle stability 

分 类 号：TQ153.3[化学工程—电化学工业] TM53[电气工程—电器]