Acetylene/argon mixture plasma to build ultrathin carbon bridge of CF_(x)/C/MnO_(2) for high-rate lithium primary battery  

作　　者：Da-Wei Zou Xing-Guang Fu Gao-Bang Chen Yi-Fan Liu Bao-Shan Wu Xian Jian 

机构地区：[1]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China [2]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 31300l,China

出　　处：《Rare Metals》2024年第6期2574-2584,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51972045);the Fundamental Research Funds for the Chinese Central Universities,China(No.ZYGX2019J025)。

摘　　要：Forming an ultrathin conducting layer on a fluorinated carbon(CFx)surface for reducing severe electrochemical polarization in lithium/fluorinated carbon primary batteries(Li/CF_(x))remains a considerable challenge for achieving batteries with excellent rate capability.Herein,CFxwas modified by using acetylene/argon mixture plasma combined with MnO_(2)particles.The CF_(x)/C/MnO_(2)composite effectively reduced the voltage hysteresis and improved the electrochemical performance of Li/CF_(x).The excellent rate performance of CF_(x)/C/MnO_(2)was due to the high electrochemical activity provided by the atomicscale conductive carbon layer and ultrafine MnO_(2)particles.Compared with pristine CF_(x),the charge transfer resistance of the optimized CF_(x)/C/MnO_(2)decreased from 218.5 to 48.2Ω,the discharge rate increased from 2C to 10C,and the power density increased from 3.11 to 13.44 kW·g^(-1),The intrinsic reason for the enhanced rate performance was attributed to the fact that the ultrathin carbon layer acted as a conductive bridge to reduce the voltage hysteresis at the initial stage of the Li/CF_(x)discharge,and the high electrochemical activity of the ultrafine MnO_(2)particles provided a faster lithium-ion diffusion rate.

关 键 词：C_(2)H_(2)/Ar plasma Fluorinated carbon Lithium primary battery MnO_(2) 

分 类 号：TM912[电气工程—电力电子与电力传动]