期刊
ACS NANO
卷 4, 期 2, 页码 741-752出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn9012065
关键词
Li-ion rechargeable battery; cathode; LiMn2O4; nanosize effect; domain boundary
类别
资金
- New Energy and Industrial Technology Development Organization, Japan (NEDO)
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Tokuyama Science Foundation
- Mitsubishi Chemical Corporation Fund
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.
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