气氛对 LiMn_2O_4中氧脱出和嵌入的影响  

The Effects of Atmosphere on the Extraction and Insertion of Oxygen in LiMn_2O_4

作　　者：文衍宣[1] 周开文[2] 周震涛[1] 

机构地区：[1]华南理工大学材料学院,广州510641 [2]广西大学材料科学研究所,南宁530004

出　　处：《材料导报》2004年第6期96-98,104,共4页Materials Reports

摘　　要：用热重(TG)和 X 射线衍射(XRD)对比研究了气氛对 LiMn_2O_4 中氧脱出和嵌入的影响。TG 和 XRD 说 {明在氧气和空气气氛下 LiMn_2O_4 中的氧能可逆地脱出和嵌入,而在氩气中却不能。提高气氛的含氧量有利于抑制加热中 LiMn_2O_4氧的脱出,促进冷却中氧的嵌入。气氛对氧脱嵌过程的相变有显著的影响。A comparative investigation was carried out to study the intercalation and extraction of oxygen inLiMn_2O_4 in oxygen,air and argon by using TG and XRD.The results of TG and XRD show the reversible oxygen in-sertion and extraction upon heating or cooling in oxygen and air is possible,but impossible in argon.By increasing oxy-gen content in atmosphere,it is propitious to restrain the oxygen extraction,and to accelerate the oxygen intercala-tion.The atmosphere has notable effect on the phase transition of the oxygen extraction and on the oxygen intercala-tion.

关 键 词：锂离子电池 正极材料 锰酸锂 热重分析 X射线衍射 氧脱出 氧嵌入 

分 类 号：TM912[电气工程—电力电子与电力传动]