Performance improvement of Li-rich layer-structured Li1.2Mn0.54Ni0.13Co0.13O2 by integration with spinel LiNi0.5Mn1.5O4

被引：78

作者：

Feng, Xin ^{[1
]}

Yang, Zhenzhong ^{[1
]}

Tang, Daichun ^{[1
]}

Kong, Qingyu ^{[2
]}

Gu, Lin ^{[1
]}

Wang, Zhaoxiang ^{[1
]}

Chen, Liquan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ION BATTERY CATHODE; SURFACE MODIFICATION; COMPOSITE CATHODE; OXIDE ELECTRODES; CAPACITY FADE; LITHIUM; PHASE; LI(LI0.17NI0.25MN0.58)O-2;

D O I：

10.1039/c4cp04087b

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：

Li-rich layered Li1+xMnyM1-x-yO2 (or denoted xLi(2)MnO(3)center dot(1-x)LiMO2, M = Ni, Co, Mn, etc.) are promising cathode materials for high energy-density Li-ion batteries. However, their commercial applications suffer from problems such as a drop in the capacity and discharge voltage during cycling. In this work, the cycling performance of a layered oxide Li1.2Ni0.13Co0.13Mn0.54O2 is improved by integration with spinel LiNi0.5Mn1.5O4 to obtain a layered-spinel composite. Characterization by powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) as well as cyclic voltammetry (CV) indicates that delayed degradation of layered Li2MnO3 and the suppressed growth of LiMn2O4-like spinel are responsible for the performance improvement.

引用

页码：1257 / 1264

页数：8

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