摘要
在锂离子电池中通过固相反应合成WS_(2)/C复合负极材料。实验结果证实,WS_(2)/C复合负极材料呈片层状结构,负极材料的比表面积较高,有利于锂离子在片层间的脱出和嵌入。碳复合后,二硫化钨纳米片的层间距保持0.63 nm不变。复合的碳材料附着在硫化钨纳米片层交接处,起到良好的导电作用,有利于提高材料的导电性。复合10%C的负极材料性能最好,整体放电比容量高于未添加碳的负极材料,在100 mA/g的电流密度下循环30次,材料的放电比容量达到876 mAh/g,高于未复合碳的材料的805 mAh/g。
WS_(2)/C composite anode material was synthesized by solid-phase reaction in lithium ion battery.The test result demonstrated that the WS_(2)/C composite anode material is the lamellar structure,the specific surface area of negative electrode material is high,it is easy to eject and embed among layers of lithium ion.The layer-to-layer spacing of nanosheets of tungsten(Ⅳ)sulfide keeps 0.63 nm after carbon composite.The composited carbon material attached on nanosheets'junction of tungsten sulfide,it plays a good conductive role,it is benefit to improve the conductivity of materials.The negative electrode material composite of 10% carbon has the best performance,the overall discharge specific capacity is higher than the negative electrode material without carbon addition,the discharge specific capacity of the material reach to 876 mAh/g,it is higher than the material without composited carbon(805 mAh/g).
作者
周娴
范苏晓
包崇军
ZHOU Xian;FAN Su-xiao;BAO Cong-jun(Kunming Metallurgical Research Institute Co.,Ltd.,Kunming,Yunnan 650031,China;Kunming University of Science and Technology,Kunming,Yunnan 650093,China)
出处
《云南冶金》
2022年第5期84-88,共5页
Yunnan Metallurgy
基金
中央引导地方科技发展项目202207AA110002
国家重点实验室开放课题CNMRCUKF20。
关键词
锂离子电池
二硫化钨
负极材料
碳复合
充放电
ithium ion battery
tungsten(Ⅳ)sulfide
negative electrode material
carbon composite
charge-discharge
