Electrochemical performance and thermal stability of LiCoO2 cathodes surface-modified with a sputtered thin film of lithium phosphorus oxynitride

被引：41
|
作者：
Choi, Kwan-Ho [1 ]
Jeon, Jun-Hong [1 ]
Park, Hong-Kyu [2 ]
Lee, Sung-Man [1 ]
机构：
[1] Kangwon Natl Univ, Dept Adv Mat Sci & Engn, Chunchon 200701, Kangwon Do, South Korea
[2] LG Chem Ltd, Battery Res Inst, Taejon 305380, South Korea
来源：
JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 24期
关键词：
Lithium cobalt oxide; Cathode; Thin film; Thermal stability; Lithium-ion battery; Lithium phosphorus; oxynitride; COMMERCIAL LICOO2; ION BATTERIES; IMPROVEMENT; BEHAVIOR; ELECTROLYTE;
D O I：
10.1016/j.jpowsour.2010.06.102
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：
A lithium phosphorus oxynitride (LiPON) glass-electrolyte thin film is coated on a lithium cobalt oxide (LiCoO2) composite cathode by means of a radio frequency (RF) magnetron sputtering method. The effect of the LiPON coating layer on the electrochemical performance and thermal stability of the LiCoO2 cathode is investigated. The thermal stability of the delithiated LiCoO2 cathode in the presence of liquid electrolyte is examined by differential scanning calorimetry (DSC). It is found that the LiPON coating, improves the rate capability and the thermal stability of the charged LiCoO2 cathode. The LiPON film appears to suppress impedance growth during cycling and inhibits side-reactions between delithiated LiCoO2 and the electrolyte. (c) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：8317 / 8321
页数：5
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