Fast Li-Ion Insertion into Nanosized LiMn2O4 without Domain Boundaries

被引：201

作者：

Okubo, Masashi ^{[1
]}

Mizuno, Yoshifumi ^{[1
]}

Yamada, Hirotoshi ^{[2
]}

Kim, Jedeok ^{[3
]}

Hosono, Eiji ^{[1
]}

Zhou, Haoshen ^{[1
]}

Kudo, Tetsuichi ^{[1
]}

Honma, Itaru ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058578, Japan

[2] Nagasaki Univ, Grad Sch Sci & Technol, Fac Engn, Nagasaki 8528521, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

来源：

ACS NANO | 2010年 / 4卷 / 02期

关键词：

Li-ion rechargeable battery; cathode; LiMn2O4; nanosize effect; domain boundary; LITHIUM MANGANESE OXIDES; PHASE-TRANSFORMATIONS; HIGH-POWER; INTERCALATION SYSTEMS; CATHODE MATERIALS; LOCAL-STRUCTURE; SPINEL; ENERGY; STABILITY; CAPACITY;

D O I：

10.1021/nn9012065

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of crystallite size on Li-ion insertion in electrode materials is of great interest recently because of the need for nanoelectrodes in higher-power Li-ion rechargeable batteries. We present a systematic study of the effect of size on the electrochemical properties of LiMn2O4, Accurate size control of nanocrystalline LiMn2O4, which is realized by a hydrothermal method, significantly alters the phase diagram as well as Li-ion insertion voltage. Nanocrystalline LiMn2O4 With extremely small crystallite size of 15 nm cannot accommodate domain boundaries between Li-rich and Li-poor phases due to interface energy, and therefore lithiation proceeds via solid solution state without domain boundaries, enabling fast Li-ion insertion during the entire discharge process.

引用

页码：741 / 752

页数：12

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