Solvent-mediated oxide hydrogenation in layered cathodes.
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| Title: | Solvent-mediated oxide hydrogenation in layered cathodes. |
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| Authors: | Gang Wan (AUTHOR), Pollard, Travis P. (AUTHOR), Lin Ma (AUTHOR), Schroeder, Marshall A. (AUTHOR), Chia-Chin Chen (AUTHOR), Zihua Zhu (AUTHOR), Zhan Zhang (AUTHOR), Cheng-Jun Sun (AUTHOR), Jiyu Cai (AUTHOR), Thaman, Harry L. (AUTHOR), Vailionis, Arturas (AUTHOR), Haoyuan Li (AUTHOR), Kelly, Shelly (AUTHOR), Zhenxing Feng (AUTHOR), Franklin, Joseph (AUTHOR), Harvey, Steven P. (AUTHOR), Ye Zhang (AUTHOR), Yingge Du (AUTHOR), Zonghai Chen (AUTHOR), Tassone, Christopher J. (AUTHOR) |
| Source: | Science (pre-March 2025). 9/13/2024, Vol. 385 Issue 6714, p1230-1236. 7p. 4 Diagrams. |
| Subjects: | Transition metal oxides, Lithium ions, Energy storage, Concentration gradient, Lithium-ion batteries |
| Abstract: | Self-discharge and chemically induced mechanical effects degrade calendar and cycle life in intercalation-based electrochromic and electrochemical energy storage devices. In rechargeable lithium-ion batteries, self-discharge in cathodes causes voltage and capacity loss over time. The prevailing self-discharge model centers on the diffusion of lithium ions from the electrolyte into the cathode. We demonstrate an alternative pathway, where hydrogenation of layered transition metal oxide cathodes induces self-discharge through hydrogen transfer from carbonate solvents to delithiated oxides. In self-discharged cathodes, we further observe opposing proton and lithium ion concentration gradients, which contribute to chemical and structural heterogeneities within delithiated cathodes, accelerating degradation. Hydrogenation occurring in delithiated cathodes may affect the chemo-mechanical coupling of layered cathodes as well as the calendar life of lithium-ion batteries. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Self-discharge and chemically induced mechanical effects degrade calendar and cycle life in intercalation-based electrochromic and electrochemical energy storage devices. In rechargeable lithium-ion batteries, self-discharge in cathodes causes voltage and capacity loss over time. The prevailing self-discharge model centers on the diffusion of lithium ions from the electrolyte into the cathode. We demonstrate an alternative pathway, where hydrogenation of layered transition metal oxide cathodes induces self-discharge through hydrogen transfer from carbonate solvents to delithiated oxides. In self-discharged cathodes, we further observe opposing proton and lithium ion concentration gradients, which contribute to chemical and structural heterogeneities within delithiated cathodes, accelerating degradation. Hydrogenation occurring in delithiated cathodes may affect the chemo-mechanical coupling of layered cathodes as well as the calendar life of lithium-ion batteries. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adg4687 |
