摘要
采用Pechini法制成作为锂离子正极材料的氧化锂锰．通过对不同温度下制得样中Mn和Li的含量及价态分析，综合XRD数据，提出了非计量氧化模锰的缺陷模型，即缺金属模型［Li1－x□x］8a［Mn（Ⅲ）pMn（Ⅳ）q□y］16dO4并探讨了该结构与其电化学性能的关系，当Li的空位缺陷量x≈0．3且Mn的空位缺陷量y≈0．1时，制得材料的比容量达127．8mA·h·g－1．
Spinel lithium manganese oxide was prepared by Pechini process under different calcining temperatures. Combined with the content of metals, valence of Mn in the compound and XRD data of the species, a metal deficient model [Li,-x□x]8a[Mn(Ⅲ)pMn(Ⅳ),q□y]16dO4, has been put up. The relationshipbetween structure and electrochemical properties of the material has been discussed and the specific capacity has been measured to be 127.8 mA·h·g-1 as x ≈0.3, y≈0.1 in the model.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第7期773-776,共4页
Acta Metallurgica Sinica
基金
湖南省自然科学基金!98JJY2060
关键词
氧化锂锰
锂离子电池
缺陷模型
正极材料
lithium manganese oxide
metal deficient model
nonstoichiometric compound
electrochemical property
