材料科学与工程学报
材料科學與工程學報
재료과학여공정학보
MATERIALS SCIENCE AND ENGINEERING
2008年
1期
83-85,109
,共4页
正极材料%Li1+xV3O8%层间距离%电导率
正極材料%Li1+xV3O8%層間距離%電導率
정겁재료%Li1+xV3O8%층간거리%전도솔
cathode material%Li1+xV3O8%interlayer distance%electronic conductivity
采用高温固相法合成了Al2O3修饰的Li1+xV3O8自正极材料,用X射线衍射、恒电流充放电实验、循环伏安法等对材料的结构和电化学性能进行了表征.结果表明Al2O3修饰使得Li1+xV3O8材料的层间距离增大,材料的导电性能和电化学反应的可逆性提高.当Al2O3含量为6mol%时,Li1+xV3O8表现出良好的循环性能,首次放电容量达到219mAh/g,10次循环后容量保持率为92.3%.
採用高溫固相法閤成瞭Al2O3脩飾的Li1+xV3O8自正極材料,用X射線衍射、恆電流充放電實驗、循環伏安法等對材料的結構和電化學性能進行瞭錶徵.結果錶明Al2O3脩飾使得Li1+xV3O8材料的層間距離增大,材料的導電性能和電化學反應的可逆性提高.噹Al2O3含量為6mol%時,Li1+xV3O8錶現齣良好的循環性能,首次放電容量達到219mAh/g,10次循環後容量保持率為92.3%.
채용고온고상법합성료Al2O3수식적Li1+xV3O8자정겁재료,용X사선연사、항전류충방전실험、순배복안법등대재료적결구화전화학성능진행료표정.결과표명Al2O3수식사득Li1+xV3O8재료적층간거리증대,재료적도전성능화전화학반응적가역성제고.당Al2O3함량위6mol%시,Li1+xV3O8표현출량호적순배성능,수차방전용량체도219mAh/g,10차순배후용량보지솔위92.3%.
The cathode material Li1+x V3O8 modified by Al2O3 has been synthesized by solid-state reaction. The structure and electrochemical properties were characterized by X-ray diffraction, galvanostatic charge/discharge experiments and cyclic voltammetry. The results reveal that interlayer distance and electronic conductivity of Li1+xV3O8 has been improved by Al2O3 modification. Li1+x V3O8 contained 6mol % Al2O3 showed excellent cyclic performance. The first discharge capacity was 219mAh/g and the capacity retention rate was 92.3% up to 10 cycles.
