Title: Real-time investigation of the structural evolution of electrodes in a commercial lithium-ion battery containing a V-added LiFePO4 cathode using in-situ neutron powder diffraction
Authors: Hu, Chih-Wei
Sharma, Neeraj
Chiang, Ching-Yu
Su, Hui-Chia
Peterson, Vanessa K.
Hsieh, Han-Wei
Lin, Yu-Fang
Chou, Wu-Ching
Shew, Bor-Yuan
Lee, Chih-Hao
Department of Electrophysics
Keywords: Lithium-ion battery;Vanadium-addition;Lithium iron phosphate;Neutron powder diffraction;In-situ experimentation
Issue Date: 15-Dec-2013
Abstract: In-situ neutron powder diffraction was employed to investigate the structural evolution of the electrode materials in a commercial lithium-ion battery used for electric buses in Taiwan. The battery, containing a vanadium-added LiFePO4 cathode, does not exhibit a delayed phase transition between LiFePO4 (triphylite) and FePO4 (heterosite) suggesting that the delayed phase transition can be suppressed through the use of vanadium-added LiFePO4 cathodes, which also enhances the capacity and prolongs the cycle life of these batteries. Furthermore, we characterize the readily reversible structural change of the anode (LixC6 where 0 < x <= 1) and correlate this to battery voltage. (C) 2013 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jpowsour.2013.02.074
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2013.02.074
Volume: 244
Begin Page: 158
End Page: 163
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