中山大学学报(自然科学版)
中山大學學報(自然科學版)
중산대학학보(자연과학판)
ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI
2007年
z1期
13-14
,共2页
陈笑婷%涂江平%吴惠明%相佳媛
陳笑婷%塗江平%吳惠明%相佳媛
진소정%도강평%오혜명%상가원
LiMn1-xCoxO2%离子交换法%锂离子电池%层状结构%电化学性能
LiMn1-xCoxO2%離子交換法%鋰離子電池%層狀結構%電化學性能
LiMn1-xCoxO2%리자교환법%리리자전지%층상결구%전화학성능
LiMn1-xCoxO2%ion exchange method%lithium ion batteries%layered structure%electrochemical characteristics
采用离子交换法制备出层状结构锂离子电池正极材料LiMn1-xCoxO2(0.1≤x≤0.5).X射线衍射和扫描电镜进行分析表明材料具有明显的层状结构和良好的结晶性.电化学性能研究表明,LiMn0.5Co0.5O2的最高放电容量为175 mAh/g,并且具有良好的循环性能,在3.0～4.5V的冲放电电压范围内,经过20次循环,可逆容量达95%.对实验结果的研究表明,随着Co含量的增加,材料具有更明显的层状性能和更优的循环性能.
採用離子交換法製備齣層狀結構鋰離子電池正極材料LiMn1-xCoxO2(0.1≤x≤0.5).X射線衍射和掃描電鏡進行分析錶明材料具有明顯的層狀結構和良好的結晶性.電化學性能研究錶明,LiMn0.5Co0.5O2的最高放電容量為175 mAh/g,併且具有良好的循環性能,在3.0～4.5V的遲放電電壓範圍內,經過20次循環,可逆容量達95%.對實驗結果的研究錶明,隨著Co含量的增加,材料具有更明顯的層狀性能和更優的循環性能.
채용리자교환법제비출층상결구리리자전지정겁재료LiMn1-xCoxO2(0.1≤x≤0.5).X사선연사화소묘전경진행분석표명재료구유명현적층상결구화량호적결정성.전화학성능연구표명,LiMn0.5Co0.5O2적최고방전용량위175 mAh/g,병차구유량호적순배성능,재3.0～4.5V적충방전전압범위내,경과20차순배,가역용량체95%.대실험결과적연구표명,수착Co함량적증가,재료구유경명현적층상성능화경우적순배성능.
Layered structure LiMn1-xCoxO2 (0.1≤x≤0.5) cathode materials were prepared by ion exchange method. The samples have an ordered layered structure and well-crystallized. LiMn0.5Co0.5O2 delivered the highest discharge capacity of 175 mAh/g and the charge retention was higher than 95% after 20 cycles. By analysis of the results, as more amount of cobalt is introduced into the LiMn1-xCoxO2 system, the more obvious layered structure and better cycle ability are obtained.
