微波处理对掺氟Li_(1+x)V_3O_8的电化学性能的影响  

Microwave Influence on the Electrochemical Performance of Fluorin Lon Doped Li_(1+x)V_3O_8

作　　者：刘永梅[1] 薛惠桑[1] 童庆松[1] 连锦明[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2005年第1期49-52,共4页Journal of Fujian Normal University：Natural Science Edition

基　　金：教育部重点基金资助项目(03065);福建省教育厅基金资助项目(JA02159);福建省自然科学基金资助项目(E0110021)

摘　　要：对在400℃至600℃固相合成的掺氟Li1+xV3O8进行微波后处理,用合成的材料组装成纽扣电池.通过充放电循环实验、XRD、IR和SEM研究了微波如何改善样品的电化学性能.结果发现,微波后处理可以改善材料的结晶度,提高材料的比容量和循环性能.经过微波处理的500℃烧结的掺氟Li1+xV3O8样品的第一循环的放电容量为238mAh/g,第40次循环的放电容量为142mAh/g.均比未经过微波处理的样品的容量提高了12%.微波处理延长了2.8V区的放电平台.The flourin ion doped Li_(1+x)V_3O_8 samples were synthesized in the temperature range of 400 to 680℃,then they were treated with microwave. The samples were studied how microwave improve the electrochemical performance by applied modern techniques , i.e., charge-discharge experiment, XRD , IR and SEM .The experimental results show that the rechargeability of the samples treated with microwave is improved and the discharge capacity is increased .The sample sintered at 500℃ and post-treated with microwave possesses a discharge capacity of 238 mAh/g at the 1st cycle and a discharge capacity of 142 mAh/g at the 40^(th) cycle , which is respectively higher 12% over those of solid phase sintered samples.

关 键 词：正极材料 掺氟锂钒氧化物 微波后处理 

分 类 号：O611.4[理学—无机化学]