Interfacial Analysis of Surface-Coated LiMn2O4 Epitaxial Thin Film Electrode for Lithium Batteries

被引：12
作者：
Suzuki, Kota [1 ]
Hirayama, Masaaki [1 ]
Kim, KyungSu [1 ]
Taminato, Sou [1 ]
Tamura, Kazuhisa [2 ]
Son, Jin-Young [3 ,4 ]
Mizuki, Jun'ichiro [5 ]
Kanno, Ryoji [1 ]
机构：
[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan
[2] Japan Atom Energy Agcy, Synchrotron Radiat Res Ctr, Kansai Res Estab, Mikazuki, Hyogo 6795148, Japan
[3] Japan Synchrotron Radiat Res Inst, SPring 8, Ind Applicat Div, Sayo, Hyogo 6795198, Japan
[4] SPring 8 Serv Co Ltd, Kamigori, Hyogo 6781205, Japan
[5] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Phys, Sanda, Hyogo 6691337, Japan
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2015年 / 162卷 / 13期
基金：
日本学术振兴会;
关键词：
X-RAY REFLECTOMETRY; ENHANCED ELECTROCHEMICAL PROPERTIES; ELECTRODE/ELECTROLYTE INTERFACE; MANGANESE-DIOXIDE; CATHODE MATERIAL; LONG-LIFE; SPINEL; CAPACITY; DEPOSITION; LINI0.8CO0.2O2;
D O I：
10.1149/2.0111513jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The effects of surface coatings on LiMn2O4 were investigated using LiMn2O4 epitaxial thin films with a thickness of 30 nm. Bare and surface-coated LiMn2O4 epitaxial thin films were synthesized on SrTiO3 (111) substrates using a pulsed laser deposition method. The surface coating, which was formed using the solid electrolyte Li3PO4 and had a thickness of 3 nm, improved the reversibility of the electrochemical reactions undergone by the LiMn2O4 epitaxial thin films. The modified surface structure provided a stable field for reversible reactions at the electrode surface, resulting in superior battery performance. The changes induced in the surface structure were maintained during battery operation; in contrast, the bare LiMn2O4 thin film exhibited structural degradation and Mn dissolution. The structural changes induced in the coated electrode and the increase in its surface stability were intrinsic effects of the Li3PO4 coating and improved the electrochemical performance of the LiMn2O4 thin-film electrode. (C) 2015 The Electrochemical Society. All rights reserved.
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收藏
页码：A7083 / A7090
页数：8
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