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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/5425

Title: Direct Evidence of Concurrent Solid-Solution and Two-Phase Reactions and the Nonequilibrium Structural Evolution of LiFePO(4)
Authors: Sharma, N
Guo, XW
Du, GD
Guo, ZP
Wang, JZ
Wang, ZX
Peterson, VK
Keywords: LITHIUM
ELECTRIC BATTERIES
NEUTRON DIFFRACTION
ELECTRODES
AMBIENT TEMPERATURE
X-RAY LASERS
Issue Date: 9-May-2012
Publisher: AMERICAN CHEMICAL SOCIETY
Citation: Sharma, N., Guo, X. W., Du, G. D., Guo, Z. P., Wang. J. Z., Wang, Z. X., & Peterson, V. K. (2012). Direct Evidence of Concurrent Solid-Solution and Two-Phase Reactions and the Nonequilibrium Structural Evolution of LiFePO(4). Journal of the American Chemical Society, 134(18), 7867-7873.
Abstract: Lithium-ion batteries power many portable devices and in the future are likely to play a significant role in sustainable-energy systems for transportation and the electrical grid. LiFePO(4) is a candidate cathode material for second-generation lithium-ion batteries, bringing a high rate capability to this technology. LiFePO(4) functions as a cathode where delithiation occurs via either a solid-solution or a two-phase mechanism, the pathway taken being influenced by sample preparation and electrochemical conditions. The details of the delithiation pathway and the relationship between the two-phase and solid-solution reactions remain controversial. Here we report, using real-time in situ neutron powder diffraction, the simultaneous occurrence of solid-solution and two-phase reactions after deep discharge in nonequilibrium conditions. This work is an example of the experimental investigation of nonequilibrium states in a commercially available LiFePO(4) cathode and reveals the concurrent occurrence of and transition between the solid-solution and two-phase reactions. © 2012, American Chemical Society.
URI: http://dx.doi.org/10.1021/ja301187u
http://apo.ansto.gov.au/dspace/handle/10238/5425
ISSN: 0002-7863
Appears in Collections:Journal Articles

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