Synthesis of layered-layered xLi 2MnO 3·(1-x) LiMO 2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process

Soo Kim, Chunjoong Kim, Jae Kyo Noh, Seungho Yu, Su Jin Kim, Wonyoung Chang, Won Chang Choi, Kyung Yoon Chung, Byung Won Cho

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A strategy of facile route to prepare the Li 2MnO 3-stabilized LiMO 2 (M = Mn, Ni, Co) electrode materials, cathode materials for Lithium secondary batteries that can be operated at the high voltage greater than 4.5 V, is proposed using the method of mechanochemical process. Li 2MnO 3 was synthesized at 400 °C, followed by the mechanochemical process with LiMO 2 to form nanocomposite with the layered-layered structure. Structures and morphologies of xLi 2MnO 3·(1-x)LiMO 2 are investigated to confirm the layered-layered structural integration. Various mole ratios of our xLi 2MnO 3·(1-x)LiMO 2 electrode materials exhibit a large discharge capacity about 200 mAh g -1 at the room temperature. The cycle performances and the specific discharge capacities are improved by the secondary heat treatment for the xLi 2MnO 3·(1-x)LiMO 2 composite electrodes where x ≤ 0.5. Our experimental results suggest the mechanochemical process is an easy and effective tool to form the nanocomposite of two components with controlled composition, especially, for the layered-layered integrated structure of xLi 2MnO 3·(1-x)LiMO 2 system.

Original languageEnglish
Pages (from-to)422-429
Number of pages8
JournalJournal of Power Sources
Volume220
DOIs
Publication statusPublished - 2012 Dec 15
Externally publishedYes

Keywords

  • Cathodes
  • Lithium secondary battery
  • Mechanochemical process
  • Nanocomposite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Synthesis of layered-layered xLi <sub>2</sub>MnO <sub>3</sub>·(1-x) LiMO <sub>2</sub> (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process'. Together they form a unique fingerprint.

Cite this