The studies of structural stability of LiNi0.5 Mn1.5O4 spinel

Sung Bin Park, Yool Koo Kim, Wan Gyu Lee, Won Il Cho, Ho Jang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The stability of the cathode materials for Li secondary battery is an important factor for its cyclability. The present paper focuses on the structural stability of LiNi0.5 Mn1.5O4 during lithiation/delithiation of Li ions and compared to that of LiMn2O4. LiMn2O4 and LiNi0.5 Mn1.5O4 powders are synthesized using a solgel method and their structural and electrochemical properties are investigated by XRD, SEM, and charge-discharge tests. LixMn2O4 and LixNi1.5 Mn1.5O4 (x=0.9,0.5,0.1) specimens are obtained after charge/discharge tests by controlling the cut-off voltage for XRD and TEM investigation. The charge-discharge tests shows that initial capacity of LiNi0.5 Mn1.5O4 is 125 mAh/g and that of LiMn2O4 is around 100 mAh/g. The capacity of LiNi0.5 Mn1.5O4 is maintained 95% of its initial capacity whereas the capacity of LiMn2O4 is maintained 65% of its initial capacity.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalJournal of Korean Institute of Metals and Materials
Volume46
Issue number3
Publication statusPublished - 2008 Mar

Keywords

  • Capacity fading
  • LiNi MnO
  • Lithium batteries
  • TEM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys

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