Characterization of LiNi0.5Mn1.5O4 spinel electrode in the presence

被引：27
作者：
Perea, Alexis [1 ]
Zaghib, Karim [2 ]
Belanger, Daniel [1 ]
机构：
[1] Univ Quebec Montreal, Montreal, PQ H3C 3P8, Canada
[2] Inst Rech Hydroquebec, Varennes, PQ J3X 1S, Canada
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 06期
关键词：
LITHIUM-ION BATTERIES; HIGH-VOLTAGE; COATED LINI0.5MN1.5O4; ELECTROCHEMICAL PERFORMANCE; ELEVATED-TEMPERATURE; CATHODE MATERIALS; SURFACE MODIFICATION; SECONDARY BATTERIES; SELF-DISCHARGE; OXIDE CATHODE;
D O I：
10.1039/c4ta05767h
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 effect of adding 1,3,5-trihydroxybenzene (THB) to the electrolyte [1.0 M LiPF6 in ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) (1 : 1 : 1)] on the performance and nature of the surface species on a LiNi0.5Mn1.5O4 cathode in a lithium battery was investigated. The THB additive (0.1 wt%) improved the capacity retention during cycling between 3.5 and 5.0 V (vs. Li+/ Li) at room temperature. Surface analysis of LiNi0.5Mn1.5O4 before and after cycling by ex situ X-ray photoelectron spectroscopy revealed that THB inhibited electrolyte decomposition on the cathode surface. The improved cyclability of the LiNi0.5Mn1.5O4 cathode is attributed to better stability of the electrode/ electrolyte interface, presumably due to the presence of a THB-derived film.
引用
收藏
页码：2776 / 2783
页数：8
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