Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Communications
Dependence of Li Content on Crystal Structure during the Charge-Discharge Process of LiMn1.5Ni0.5O4 as a CathodeMaterial for 5 V Class Lithium Secondary Battery
Yasushi IDEMOTOHiroshi SEKINEKoichi UINobuyuki KOURA
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JOURNALS OPEN ACCESS

2003 Volume 71 Issue 12 Pages 1142-1144

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Abstract

We investigated the crystal structure change during the charge-discharge process of LiMn1.5Ni0.5O4 as a 5 V class cathode active material, which was prepared by the sol-gel method. The lithium content of Li1−xMn1.5Ni0.5O4 (x = 0.5, 0.7, 1.0) was controlled by electrochemical lithium extraction. The crystal structure was determined by Rietveld analysis using powder neutron diffraction. As a result, all samples consisted of three phases (space group: P4332) of different lattice constant and Ni valences. The each phase showed a different distortion of the Mn,Ni (12d)-O octahedral site and the Madelung energy.

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© 2003 The Electrochemical Society of Japan
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