LiNi0.5Mn1.5O4 spinel cathode using room temperature ionic liquid as electrolyte

被引：39

作者：

Gao, Xuan-Wen ^{[1
]}

Feng, Chuan-Qi ^{[2
]}

Chou, Shu-Lei ^{[1
,5
]}

Wang, Jia-Zhao ^{[1
,5
]}

Sun, Jia-Zeng ^{[3
,5
]}

Forsyth, Maria ^{[4
,5
]}

MacFarlane, Douglas R. ^{[3
,5
]}

Liu, Hua-Kun ^{[1
,5
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Hubei Univ, Coll Chem & Chem Engn, Wuhan 430062, Peoples R China

[3] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[4] Deakin Univ, Inst Technol Res & Innovat, Geelong, Vic 3217, Australia

[5] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia

来源：

ELECTROCHIMICA ACTA | 2013年 / 101卷

基金：

澳大利亚研究理事会;

关键词：

Lithium-ion battery; Ionic liquid; LiNi0.5Mn1.5O4; nanoparticles; Cathode materials; Rheological phase method; RECHARGEABLE LITHIUM BATTERIES; LI ELECTRODES; CYCLING EFFICIENCY; METAL; SURFACE; ELECTROCHEMISTRY; POTENTIALS; CHALLENGES; COMPOSITE; CELLS;

D O I：

10.1016/j.electacta.2012.10.156

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, LiNi0.5Mn1.5O4 (LNMO) nanoparticles were prepared as a 5 V cathode material via a rheological phase method and annealed at different temperatures: 680 degrees C, 750 degrees C, and 820 degrees C. The sample annealed at 750 degrees C shows the best performance. A room temperature ionic liquid (RTIL) containing 1 M lithium bis(trifluoromethanesulfonyl) imide (LiNTf2) in N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl) imide (C(4)mpyrNTf(2)) was used as novel electrolyte in conjunction with the LNMO cathodes and their electrochemical properties have been investigated. The results show that the LNMO using RTIL as electrolyte has better coulombic efficiency and comparable discharge capacities to those of the cells assembled with standard liquid electrolyte (1 M LiPF6 in ethylene carbonate/diethyl carbonate). Electrochemical impedance spectroscopy shows that the RTIL is much more stable as the electrolyte for LiNi0.5Mn1.5O4 than the conventional electrolyte. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：151 / 157

页数：7