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

作　　者：刘进 王丽[1] 孙瑞敏[1] 师兆忠[1] 赵辉[1] 罗京 Liu Jin;Wang Li;Sun Ruimin;Shi Zhaozhong;Zhao Hui;Luo Jing(Henan Key Laboratory for Advanced Silicon Carbide Materials,Kaifeng Key Laboratory of Clean Production Technology of Chemical Industry,Kaifeng University,Kaifeng 475004,Henan,China)

机构地区：[1]河南省先进碳化硅材料重点实验室,开封市化工清洁生产技术重点实验室,开封大学,河南开封475004

出　　处：《钢铁钒钛》2020年第2期1-5,共5页Iron Steel Vanadium Titanium

基　　金：河南省高等学校重点科研项目(18B480001);开封市科技发展计划项目(1808008);开封大学校级科研基金项目博士基金项目(KDBS-2017-001);开封大学大学生创新基金项目(锂离子电池磷酸铁锂材料的改性研究)。

摘　　要：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.

关 键 词：锂离子电池 LIV3O8 固相配位法 合成动力学 

分 类 号：TF841.3[冶金工程—有色金属冶金]