A layered nonstoichiometric lepidocrocite-type sodium titanate anode material for sodium-ion batteries
Date Published |
09/2021
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Publication Type | Journal Article
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Authors | |
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DOI |
10.1557/s43581-021-00008-6
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Abstract |
A lepidocrocite-structured sodium titanate prepared by ion-exchange of a Cs-containing precursor shows promise as an anode material for sodium ion batteries, with a discharge capacity of up to 229 mAh g−1 at an average potential of about 0.6 V vs. Na+/Na. Titanium vacancies in the metal oxide layers provide additional sites for sodium intercalation in addition to interlayer sites, which accounts for the higher capacity compared to other previously reported lepidocrocite-structured titanates. By screening a series of electrolyte formulations and binders, we were able to improve the first-cycle coulombic efficiency to 81.8% and 94.7% respectively using CMC/SBR-based and binder-free electrodes in ether electrolytes. The electrochemical consequences of short-term air-exposure on the electrodes are also discussed. |
Journal |
MRS Energy & Sustainability
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Volume |
8
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Year of Publication |
2021
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Issue |
2
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Pagination |
88 - 97
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ISSN Number |
2329-2229
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URL | |
Short Title |
MRS Energy & Sustainability
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Refereed Designation |
Refereed
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Organizations | |
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