Rechargeable-battery chemistry based on lithium oxide growth through nitrate anion redox
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21752_4_art_0_pw1pcz.pdf
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Accepted version
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184.47 KB
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Author(s)
Gallant, Betar M. (Betar Maurkah)
Date Issued
October 2019
Journal
Nature Chemistry
Publisher
Springer Science and Business Media LLC
Citation
Giordani, Vincent et al. “Rechargeable-battery chemistry based on lithium oxide growth through nitrate anion redox.” Nature Chemistry, 11, 12 (October 2019): 1133–1138 © 2019 The Author(s)
Version
Author's final manuscript
Abstract
Next-generation lithium-battery cathodes often involve the growth of lithium-rich phases, which enable specific capacities that are 2−3 times higher than insertion cathode materials, such as lithium cobalt oxide. Here, we investigated battery chemistry previously deemed irreversible in which lithium oxide, a lithium-rich phase, grows through the reduction of the nitrate anion in a lithium nitrate-based molten salt at 150 °C. Using a suite of independent characterization techniques, we demonstrated that a Ni nanoparticle catalyst enables the reversible growth and dissolution of micrometre-sized lithium oxide crystals through the effective catalysis of nitrate reduction and nitrite oxidation, which results in high cathode areal capacities (~12 mAh cm–2). These results enable a rechargeable battery system that has a full-cell theoretical specific energy of 1,579 Wh kg–1, in which a molten nitrate salt serves as both an active material and the electrolyte.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/S41557-019-0342-6
