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https://hdl.handle.net/2440/130246
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Type: | Journal article |
Title: | Direct evidence of concurrent solid-solution and two-phase reactions and the nonequilibrium structural evolution of LiFePO₄ |
Other Titles: | Direct evidence of concurrent solid-solution and two-phase reactions and the nonequilibrium structural evolution of LiFePO(4) |
Author: | Sharma, N. Guo, X. Du, G. Guo, Z. Wang, J. Wang, Z. Peterson, V.K. |
Citation: | Journal of the American Chemical Society, 2012; 134(18):7867-7873 |
Publisher: | American Chemical Society |
Issue Date: | 2012 |
ISSN: | 0002-7863 1520-5126 |
Statement of Responsibility: | Neeraj Sharma, Xianwei Guo, Guodong Du, Zaiping Guo, Jiazhou Wang, Zhaoxiang Wang, and Vanessa K. Peterson |
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. |
Rights: | © 2012 American Chemical Society. |
DOI: | 10.1021/ja301187u |
Grant ID: | http://purl.org/au-research/grants/arc/DP1094261 |
Published version: | http://dx.doi.org/10.1021/ja301187u |
Appears in Collections: | Aurora harvest 4 Chemistry publications |
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