Nano-sized La0.8Sr0.2MnO3 as oxygen reduction catalyst in nonaqueous Li/O2 batteries

被引：57

作者：

Fu, Zhenghao ^{[1
]}

Lin, Xiujing ^{[1
]}

Huang, Tao ^{[1
]}

Yu, Aishui ^{[1
]}

机构：

[1] Fudan Univ, Dept Chem, Inst New Energy, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200438, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2012年 / 16卷 / 04期

关键词：

Sol-gel; Solid-state reaction; Li/O-2; Catalytic activity; RECHARGEABLE LITHIUM BATTERIES; ELECTRODE; CATHODE;

D O I：

10.1007/s10008-011-1467-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nano-sized La0.8Sr0.2MnO3 prepared by the polyethylene glycol assisting sol-gel method was applied as oxygen reduction catalyst in nonaqueous Li/O-2 batteries. The as-synthesized La0.8Sr0.2MnO3 was characterized by X-ray diffraction (XRD), scanning electron microscopy, and Brunauer-Emmet-Teller measurements. The XRD results indicate that the sample possesses a pure perovskite-type crystal structure, even sintered at a temperature as low as 600 A degrees C, whereas for solid-state reaction method it can only be synthesized above 1,200 A degrees C. The as-prepared nano-sized La0.8Sr0.2MnO3 has a specific surface area of 32 m(2) g(-1), which is much larger than the solid-state one (1 m(2) g(-1)), and smaller particle size of about 100 nm. Electrochemical results show that the nano-sized La0.8Sr0.2MnO3 has better catalytic activity for oxygen reduction, higher discharge plateau and specific capacity.

引用

页码：1447 / 1452

页数：6

共 24 条

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