Polyimide gel polymer electrolyte-nanoencapsulated LiCoO2 cathode materials for high-voltage Li-ion batteries

被引：88

作者：

Park, Jang-Hoon ^{[1
]}

Kim, Jong-Su ^{[2
]}

Shim, Eun-Gi ^{[2
]}

Park, Kyung-Won ^{[3
]}

Hong, Young Taik ^{[4
]}

Lee, Yun-Sung ^{[5
]}

Lee, Sang-Young ^{[1
]}

机构：

[1] Kangwon Natl Univ, Dept Chem Engn, Coll Engn, Chunchon 200701, Kangwondo, South Korea

[2] Tech Semichem, Yongin 446599, Gyeonggido, South Korea

[3] Soongsil Univ, Dept Chem & Environm Engn, Seoul 156743, South Korea

[4] Korea Res Inst Chem Technol, Energy Mat Res Ctr, Taejon 305600, South Korea

[5] Chonnam Natl Univ, Sch Appl Chem Engn, Kwangju 500757, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 08期

关键词：

Lithium-ion batteries; LiCoO2; High-voltage; Nanoencapsulation; Polyimide; Interfacial reaction; LITHIUM BATTERIES; 4.5; V; TEMPERATURE; PERFORMANCE; IMPROVEMENT; STORAGE;

D O I：

10.1016/j.elecom.2010.05.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We demonstrate a novel and facile approach to surface modification of high-voltage charged LiCoO2, which is based on encapsulating LiCoO2 by a polyimide (PI) gel polymer electrolyte layer. The PI is introduced onto the LiCoO2 by thermally curing 4-component (pyromellitic dianhydride/biphenyl dianhydride/phenylenediamine/oxydianiline) polyamic acid. The PI nanoencapsulating layer features the high surface coverage, nanometer thickness, and facile ion transport. These unique characteristics are expected to enable the PI coating layer to effectively suppress the undesirable interfacial reaction of the LiCoO2 with liquid electrolyte, which plays a key role in noticeably improving the 4.4 V cycle performance and mitigating the vigorous exothermic reaction between the charged LiCoO2 and liquid electrolyte. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1099 / 1102

页数：4

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