Local structural change in Li2FeSiO4 polyanion cathode material during initial cycling

被引：10

作者：

Masese, Titus ^{[1
]}

Orikasa, Yuki ^{[1
]}

Mori, Takuya ^{[1
]}

Yamamoto, Kentaro p ^{[1
]}

Ina, Toshiaki ^{[1
]}

Minato, Taketoshi ^{[2
]}

Nakanishi, Koji ^{[2
]}

Ohta, Toshiaki ^{[3
]}

Tassel, Cedric ^{[4
]}

Kobayashi, Yoji ^{[4
]}

Kageyama, Hiroshi ^{[4
]}

Arai, Hajime ^{[2
]}

Ogumi, Zempachi ^{[2
]}

Uchimoto, Yoshiharu ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Human & Environm Studies, Sakyo Ku, Kyoto 6068501, Japan

[2] Kyoto Univ, Off Soc Acad Collaborat Innovat, Uji, Kyoto 6110011, Japan

[3] Ritsumeikan Univ, SR Ctr, Kusatsu, Shiga 5258577, Japan

[4] Kyoto Univ, Grad Sch Engn, Nishikyo Ku, Kyoto 6158510, Japan

来源：

SOLID STATE IONICS | 2014年 / 262卷

关键词：

Lithium-ion battery; Li2FeSiO4; X-ray absorption spectroscopy (XAS); BATTERIES; MN; FE; CO;

D O I：

10.1016/j.ssi.2013.11.018

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：

To elucidate the Li+ extraction and insertion mechanism for Li2FeSiO4 nanoparticles, at the atomic scale, X-ray absorption spectroscopy (XAS) measurements at Fe and Si K-edges were performed. Fe K-edge XAS spectra suggest irreversible changes occurring in the local and electronic environment of iron which can be attributable to the characteristic shift in potential plateau during initial cycling of Li2 - xFeSiO4 system. While the local environment around Fe atoms significantly changes upon initial cycling, the local Si-O environment is mostly maintained. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：110 / 114

页数：5

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