Size and shape controlled LiMnPO4 nanocrystals by a supercritical ethanol process and their electrochemical properties

被引：74

作者：

Rangappa, Dinesh ^{[1
,2
]}

Sone, Koji ^{[2
]}

Zhou, Ying ^{[2
]}

Kudo, Tetsuichi ^{[2
]}

Honma, Itaru ^{[1
,2
]}

机构：

[1] Tohoku Univ, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058568, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 39期

关键词：

HYDROTHERMAL SYNTHESIS; ELECTRODE MATERIALS; LIFEPO4; TEMPERATURE; PERFORMANCE;

D O I：

10.1039/c1jm12208h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we report the preparation of systematically size and shape controlled LiMnPO4 nanocrystals under supercritical fluid conditions. The effect of different reaction conditions such as the reaction time, temperature, surfactant and precursor concentration on the size and shape of the LiMnPO4 nanocrystals was studied in detail. It was noticed that shorter reaction time and lower reaction temperature facilitated the formation of crystalline LiMnPO4 nanocrystals with size similar to 10 nm. The nanocrystals ranging from 7 to 24 nm were obtained by controlling different reaction conditions. The formation mechanism for the LiMnPO4 nanocrystals is proposed based on the obtained results. The effect of nanosize on the electrochemical properties of LiMnPO4 nanocrystals was studied. Improved electrochemical performance was observed for similar to 20 nm sized LiMnPO4 after conductive carbon coating. This study indicates the importance of LiMnPO4 nanocrystals below 50 nm size in improving the electrochemical performance of LiMnPO4 cathodes.

引用

页码：15813 / 15818

页数：6

共 26 条

[1] Hydrothermal synthesis of metal oxide fine particles at supercritical conditions [J].