摘要
用LiOH、Li2 CO3 和V2 O5作原材料分别通过凝胶法和高温反应 ,合成了锂离子电池正极材料LiV3 O8。利用XRD、SEM对合成材料进行表征 ,通过恒流充放电和交流阻抗技术进行电化学性能研究。结果表明 :采用凝胶法合成的LiV3 O8具有较高的嵌锂容量和良好的循环可逆性 ,在 0 1C倍率和 1 8～ 3 6V的电压范围内具有 2 60mAh/ g的首次放电容量。
Li-ion battery cathode material LiV_3O_8 was synthesized by gel method and high temperature reaction with LiOH, Li_2CO_3 and V_2O_5 as raw materials. The synthesized samples were characterized by XRD, SEM. Its electrochemical behavior was studied by galvanostatic charge-discharge and AC impedance technique. The results showed LiV_3O_8 prepared by gel method had higher capacity than that of high temperature method for lithium insertion and better cyclic reversibility,its initial discharge capacity was 260mAh/g at 0.1 C rate and the voltage range of 1.8～3.6V.
出处
《电池》
CAS
CSCD
北大核心
2004年第3期164-165,共2页
Battery Bimonthly
