Improved electrochemical properties of BiOF-coated 5 V spinel Li[Ni0.5Mni1.5]O4 for rechargeable lithium batteries

被引：97

作者：

Kang, Han-Byeol ^{[1
]}

Myung, Seung-Taek ^{[2
]}

Amine, Khalil ^{[3
]}

Lee, Sung-Man ^{[4
]}

Sun, Yang-Kook ^{[1
]}

机构：

[1] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

[2] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan

[3] Argonne Natl Lab, Chem Sci & Engn Div, Electrochem Technol Program, Argonne, IL 60439 USA

[4] Kangwon Natl Univ, Dept Adv Mat Sci & Engn, Chunchon 200701, Kangwon Do, South Korea

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 07期

关键词：

5 V spinel; BiOF coating; Cathode; HF scavenger; Lithium batteries; CATHODE MATERIAL; LINI0.5MN1.5O4; SPINEL; LI; NI; POTENTIALS; OXIDES; METAL; ME; AL; CO;

D O I：

10.1016/j.jpowsour.2009.10.068

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：

The electrochemical properties of BiOF-coated 5 V spinel Li[Ni0.5Mn1.5]O-4 were investigated at elevated temperatures (55 degrees C). As observed by scanning and transmission electron microscopy, BiOF nanolayers with similar to 10 nm thickness were coated on the surface of Li[Ni0.5Mn1.5]O-4. The BiOF coating layer protected the surface of the active materials from HF generated by the decomposition of LiPFG in the electrolyte during electrochemical cycling. The dissolution of transition metal elements was also suppressed upon cycling. Therefore, the capacity retention of the BiOF-coated Li[Ni0.5Mn1.5]O-4 was obviously improved compared to the pristine Li[Ni0.5Mn1.5]O-4 at 55 degrees C. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2023 / 2028

页数：6

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