Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 160, Issue 3, Pages A444-A448Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.036303jes
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Funding
- Fundamental R&D Program for Technology of World Premier Materials
- Ministry of Knowledge Economy, Republic of Korea
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant
- Korea government Ministry of Knowledge Economy [20114010203120]
- Energy Efficiency and Resources R&D program under the Ministry of Knowledge Economy, Republic of Korea [20112020100070]
- Industrial Strategic Technology Development Program [10038617]
- Ministry of Knowledge Economy (MKE, KOREA)
- National Research Foundation of Korea Grant
- Korean Government (MEST) [NRF-2009-0094219]
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The structural evolution of multi-component olivines upon delithiation and lithiation was investigated by ex-situ X-ray diffraction. We found that one-phase de/lithiation occurs for multi-component olivines for a fairly large compositional range of transition metal species given that two-phase de/lithiation is generally accepted for olivine cathodes. We discuss the driving force that determines the phase behavior (two-phase reaction vs. one-phase reaction) of olivines in terms of enthalpy of mixing presumably dominated from the electrostatic interaction among cations and the elastic strain stored in the crystal due to the volume change of redox active element. We believe that this fundamental study on the phase behavior of olivines will provide insight into the intrinsic electrochemical properties of olivine electrodes for rechargeable lithium batteries. (C) 2013 The Electrochemical Society. [DOI: 10.114912.036303jes] All rights reserved.
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