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Insights into the distinct lithiation/sodiation of porous cobalt oxide by in operando synchrotron x-ray techniques and ab initio molecular dynamics simulations [electronic resource].

Published
Washington, D.C. : United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 953-962 : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Sodium-ion batteries (SIBs) have been considered as one of the promising power source candidates for the stationary storage industries owing to the much lower cost of sodium than lithium. It is well-known that the electrode materials largely determine the energy density of the battery systems. However, recent discoveries on the electrode materials showed that most of them present distinct lithium and sodium storage performance, which is not yet well understood. In this work, we performed a comparative understanding on the structural changes of porous cobalt oxide during its electrochemical lithiation and sodiation process by in operando synchrotron small angel X-ray scattering, X-ray diffraction, and X-ray absorption spectroscopy. It was found that compared to the lithiation process, the porous cobalt oxide undergoes less pore structure changes, oxidation state, and local structure changes as well as crystal structure evolution during its sodiation process, which is attributed to the intrinsic low sodiation activity of cobalt oxide as evidenced by ab initio molecular dynamics simulations. Moreover, it was indicated that the sodiation activity of metal sulfides is higher than that of metal oxides, indicating a better candidate for SIBs. Furthermore, such understanding is crucial for future design and improvement of high-performance electrode materials for SIBs.
Report Numbers
E 1.99:1373413
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Note
Published through SciTech Connect.
01/10/2017.
"132297"
Nano Letters 17 2 ISSN 1530-6984 AM
Gui -Liang Xu; Tian Sheng; Lina Chong; Tianyuan Ma; Cheng -Jun Sun; Xiaobing Zuo; Di -Jia Liu; Yang Ren; Xiaoyi Zhang; Yuzi Liu; Steve M. Heald; Shi -Gang Sun; Zonghai Chen; Khalil Amine.
Funding Information
AC02-06CH11357
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