skip to main content

Title: Performance improvement of Li-rich layer-structured Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 by integration with spinel LiNi 0.5 Mn 1.5 O 4

Li-rich layered Li 1+xMnyM 1-x-yO 2 (or denoted xLi 2MnO 3center dot 1-xLiMO 2, 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 Li 1.2Ni 0.13Co 0.13Mn 0.54O 2 is improved by integration with spinel LiNi 0.5Mn 1.5O 4 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 Li 2MnO 3 and the suppressed growth of LiMn 2O 4-like spinel are responsible for the performance improvement.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
OSTI Identifier:
1247156
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 17; Journal Issue: 2
Publisher:
Royal Society of Chemistry
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE