Electrochemical properties of 0.6Li2MnO3-0.4Li(Ni1/3Mn1/3Co1/3)O2 composite cathode powders with spherical shape and fine size

Mun Yeong Son, Jung Hyun Kim, Yun Chan Kang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

0.6Li2MnO3-0.4Li(Ni1/3Mn1/3Co1/3)O2 composite cathode powders are prepared by spray pyrolysis. The spherical shape of the precursor powders are maintained after post-treatment at temperatures between 600 and 900°C. The grain growth in the powders increases with increasing post-treatment temperatures. The BET surface area of the composite cathode powderspost-treated at 800°C is 7 mg2 g-1. The discharge capacity of the cathode powders post-treated at 800°C decreases from 274 mAh gg-1 to 242 mAh gg-1 by the 50th cycle, the capacity retention being 88.3%. However, the discharge capacity of the powders post-treated at 700°C decreases from 247 mAh g-1 to 201 mAh gg-1 by the 9th cycle. A high amount of Li2MnO2 in composite powders post-treated at high temperatures improves their cycle properties even at a high cutoff voltage of 4.8 V.

Original languageEnglish
Pages (from-to)2417-2429
Number of pages13
JournalInternational Journal of Electrochemical Science
Volume8
Issue number2
Publication statusPublished - 2013 Feb 1
Externally publishedYes

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Keywords

  • Chemical synthesis
  • Composite materials
  • Electrochemical properties
  • Nanostructures

ASJC Scopus subject areas

  • Electrochemistry

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