Mechanochemical Synthesis of Li2MnO3 Shell/LiMO2 (M = Ni, Co, Mn) Core-Structured Nanocomposites for Lithium-Ion Batteries

Core/shell-like nanostructured xLi 2 MnO 3 ·(1−x)LiMO 2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO 2 core is designed to have a high-content of Ni, which increases the specific...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2014-05, Vol.4 (1), p.4847-4847, Article 4847
Main Authors: Noh, Jae-Kyo, Kim, Soo, Kim, Haesik, Choi, Wonchang, Chang, Wonyoung, Byun, Dongjin, Cho, Byung-Won, Chung, Kyung Yoon
Format: Article
Language:English
Subjects:
147/135
147/143
639/301/299/891
639/638/549
Batteries
Calorimetry
Composite materials
Differential scanning calorimetry
Electrochemistry
High temperature
Humanities and Social Sciences
Lithium
multidisciplinary
Nanocomposites
Nanoparticles
Science
Specific capacity
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Core/shell-like nanostructured xLi 2 MnO 3 ·(1−x)LiMO 2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO 2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li 2 MnO 3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO 2 . In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi 2 MnO 3 ·(1−x)LiMO 2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li 2 MnO 3 shell is effective in stabilizing the LiMO 2 core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep04847