Destruction behavior of carbon hybridized Li2MnSiO4 and Li2FeSiO4 nanoparticles for cathode materials

被引：17

作者：

Sasaki, Hirokazu ^{[1
]}

Nemoto, Atsushi ^{[1
]}

Moriya, Maki ^{[1
]}

Miyahara, Masahiko ^{[1
]}

Hokazono, Mana ^{[1
]}

Katayama, Shingo ^{[1
]}

Akimoto, Yuji ^{[1
]}

Nakajima, Akira ^{[2
]}

Hirano, Shin-ichi ^{[3
]}

机构：

[1] Shoei Chem Inc, Shinjuku Ku, Tokyo 1630443, Japan

[2] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

[3] Shanghai Jiao Tong Univ, Hirano Inst Mat Innovat, Shanghai 200240, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷

关键词：

Silicate; Batteries; Cathode material; Lithium ion battery; PERFORMANCE; EDGE; IRON;

D O I：

10.1016/j.ceramint.2015.03.139

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Carbon-hybridized Li2MSiO4 (M=Mn, Fe) nanoparticles were synthesized using the spray pyrolysis method subsequent to grinding and heat treatment. The carbon-hybridized Li2MnSiO4 particles exhibited excellent cycle performance up to 1.21 Li/formula-unit delithiation(charged)/lithiation(discharged) cycles. However, the discharge capacity decreased rapidly under high delithiation/lithiation conditions of more than 1.25 Li/formula-unit, although Li2FeSiO4 has better cycle stability under delithiation/lithiation of 1.5 Li/formula-unit. The local structure differences examined using XANES between Li2MnSiO4 and Li2FeSiO4 revealed that the coordination polyhedral for Mn ion changed from tetrahedron to octahedron by cycling, while that of Fe ion was maintained as a tetrahedron. Results suggest that the coordination preference of Mn ion in the structure governs the cycle performance. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：S680 / S685

页数：6

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