摘要
介绍了用商品c-V2O5作正极材料组装成扣式试验电池并对电池进行了性能测试;从理论上分析了c-V2O5电极的电化学阻抗谱(EIS)、循环伏安特性(CV)、首次恒流放电(CD)和循环性能特性线(DC)。CD和DC测试结果显示,以60mA/g的电流密度充放电,其首次放电比容量高达220mAh/g,充放电效率可达97%,循环35次后,容量保持率仍可达47%。
Electrochemical characterization was carried out on commercial cryst al vanadium pentoxide (c-V2O5) to verify its application as cathode materials f or lithium rechargeable batteries by tests of EIS,CV,constant discharge (CD) a nd discharge/charge (DC). Analysis results of CD and DC indicated the sample ach ieved a high initial discharge specific capacity of approximate 220mAh/g and a c orresponding efficiency of 97%. Its preservation ratio of capacity still kept a s high as 47%even after 35 cycles at current density of 60mA/g.
出处
《电池工业》
CAS
2005年第2期70-73,共4页
Chinese Battery Industry
关键词
可充锂电池
晶态V2O5
电化学性能
比容量
lithium rechargeable batteries
crystal vanadium pentoxide
electro chemical characterization
specific capacity
