电池
電池
전지
BATTERY BIMONTHLY
2010年
2期
103-105
,共3页
负极材料%尖晶石%晶体结构%电化学性能%Li4-xAlxTi5O12
負極材料%尖晶石%晶體結構%電化學性能%Li4-xAlxTi5O12
부겁재료%첨정석%정체결구%전화학성능%Li4-xAlxTi5O12
cathode material%spinel%crystal structure%electrochemical performance%Li4-xAlxTi5O12
采用高温固相法合成了锂离子电池负极材料Li4-xAlxTi5O12(x=0、0.05、0.10、0.15或0.20).用XRD、SEM、循环伏安、电化学阻抗谱和恒流充放电测试,研究了产物的晶体结构和电化学性能.制备的Li4-xAlxTi5O12具有良好的尖晶石结构,其中Li3.90Al0.10Ti5O12的电化学性能较好,以0.5 C循环的首次放电比容量为162.21 mAh/g,第50次循环的放电比容量为151.91 mAh/g,容量保持率为93.65%.
採用高溫固相法閤成瞭鋰離子電池負極材料Li4-xAlxTi5O12(x=0、0.05、0.10、0.15或0.20).用XRD、SEM、循環伏安、電化學阻抗譜和恆流充放電測試,研究瞭產物的晶體結構和電化學性能.製備的Li4-xAlxTi5O12具有良好的尖晶石結構,其中Li3.90Al0.10Ti5O12的電化學性能較好,以0.5 C循環的首次放電比容量為162.21 mAh/g,第50次循環的放電比容量為151.91 mAh/g,容量保持率為93.65%.
채용고온고상법합성료리리자전지부겁재료Li4-xAlxTi5O12(x=0、0.05、0.10、0.15혹0.20).용XRD、SEM、순배복안、전화학조항보화항류충방전측시,연구료산물적정체결구화전화학성능.제비적Li4-xAlxTi5O12구유량호적첨정석결구,기중Li3.90Al0.10Ti5O12적전화학성능교호,이0.5 C순배적수차방전비용량위162.21 mAh/g,제50차순배적방전비용량위151.91 mAh/g,용량보지솔위93.65%.
Li-ion battery cathode materials Li4-xAlxTi5O12(x=0,0.05,0.10,0.15 or 0.20)were synthesized by high temperature solid-state method.The crystal structure and electrochemical performance of the products were studied by XRD,SEM,cyclic voltammetry ,electrochemical impedance spectroecopy and galvanostatic charge-discharge tests.The prepared Li4-xAlxTi5O12 had fine spinel structure ,Li3.90Al0.10Ti5O12 had better electrochemical performance, its initial specific discharge capacity of 0.5 C cycle was 162.21 mAh/g,the specific discharge capacity at the 50th cycle was 151.91 mAh/g,the capacity retention was 93.65%.
