LiV3O8材料的固相配位法合成及机理研究

Synthesis and Mechanism of LiV3O8 Material by Solid Phase Coordination

采用固相配位法合成出了层状锂钒氧化物LiV3O8,并借助TG-DTA与XRD对其反应机理进行了研究。结果表明:热处理温度550℃,烧结24 h可得到单一相产物LiV3O8,材料首次放电量达到了180 mAh/g,表现出较优的容量储存性能。采用Coats-Redfern积分法和Anderson-Freeman微分法得出合成过程最概然机理为随机成核和随后增长,并推出反应方程及反应动力学方程。

Layered lithium vanadium oxide LiV3O8 was synthesized by solid phase coordination method,and the reaction mechanism was studied by TG-DTA and XRD.The results show that LiV3O8 with a single phase can be obtained at 550℃of heat treatment temperature for 24 h.The initial discharge capacity of the material reaches 180 mAh/g,showing better capacity storage performance.Using Coats-Redfern integral method and Anderson-Freeman differential method,the most probable mechanism of the synthesis process is random nucleation and subsequent growth,and the reaction equation and kinetics equation are derived.