Properties and Structure of Spinel Li-Mn-O-F Compounds for Cathode Materials of Secondary Lithium-ion Battery

• 来源期刊: 中国化学（英文版）
• 学科: 化学
• 年，卷（期）: 2001,（4）
• 所属期刊栏目: ARTICLES
• 页码范围: 347-351
• 页数: 5页
• 分类号: O6
• 语种: 英文

摘要

The spinel Li-Mn-O-F compound cathode materials were syn-thesized by solid-state reaction from calculated amounts LiOH·H2O, MnO2(EMD) and LiF. The results of the elec-trochemical test demonstrated that these materials exhibited excellent electrochemical properties. It's initial capacity is ～ 115 mAh·g-1 and reversible efficiency is about 100%. After 60 cycles, its capacity is still around 110 mAh·g1 with nearly 100% reversible efficiency. The spinel Li-Mn-O-F compound possibly has two structure models: interstitial model [Li]-[Mn3+x Mn4+2-x-]O4Fδ, in which the fluorine is located on the interstice of crystal lattice, and substituted model [Li ]-[Mn3+x+Mn4+2-x]O4-δFδ, which the fluorine atom substituted the oxygen atom. The electrochemical result supports the interstitial model [Li] [Mn3+x+Mn4+2-x]O4Fδ.