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LiMnO2, Orthorhombic, Cathode, Li-ion Battery, Emulsion1. Introduction

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2005, 15(2), pp.51-56
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Chung Hoon TaeK 1 김정민 1

1동신대학교

Accredited

ABSTRACT

We prepared orthorhombic LiMnO2 by emulsion drying method. The thermo-gravimetric measurement and X-ray diffraction studies indicated that the orthorhombic LiMnO2 phase was formed above 800oC by oxygen evaporation process from LiMn2O4 and Li2MnO3. In this process, we could control the ordering of LiMnO2 with heating rate. It was observed that electrochemical properties depended on the ordering of this material; the ordered one exhibited good capacity retention, whereas the disordered one suffered capacity fading upon cycling, especially in the 3 V region. Transmission electron microscopic (TEM) study showed that this difference is related with difference in the stress relieving effects in the samples.

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