Cobalt-free composite-structured cathodes with lithium-stoichiometry control for sustainable lithium-ion batteries
In: Nature Communications ; volume 15, issue 1 ; ISSN 2041-1723, 2024
Online
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Zugriff:
Lithium-ion batteries play a crucial role in decarbonizing transportation and power grids, but their reliance on high-cost, earth-scarce cobalt in the commonly employed high-energy layered Li(NiMnCo)O 2 cathodes raises supply-chain and sustainability concerns. Despite numerous attempts to address this challenge, eliminating Co from Li(NiMnCo)O 2 remains elusive, as doing so detrimentally affects its layering and cycling stability. Here, we report on the rational stoichiometry control in synthesizing Li-deficient composite-structured LiNi 0.95 Mn 0.05 O 2 , comprising intergrown layered and rocksalt phases, which outperforms traditional layered counterparts. Through multiscale-correlated experimental characterization and computational modeling on the calcination process, we unveil the role of Li-deficiency in suppressing the rocksalt-to-layered phase transformation and crystal growth, leading to small-sized composites with the desired low anisotropic lattice expansion/contraction during charging and discharging. As a consequence, Li-deficient LiNi 0.95 Mn 0.05 O 2 delivers 90% first-cycle Coulombic efficiency, 90% capacity retention, and close-to-zero voltage fade for 100 deep cycles, showing its potential as a Co-free cathode for sustainable Li-ion batteries.
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Cobalt-free composite-structured cathodes with lithium-stoichiometry control for sustainable lithium-ion batteries
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Autor/in / Beteiligte Person: | Chen, Ke ; Barai, Pallab ; Kahvecioglu, Ozgenur ; Wu, Lijun ; Pupek, Krzysztof Z. ; Ge, Mingyuan ; Ma, Lu ; Ehrlich, Steven N. ; Zhong, Hui ; Zhu, Yimei ; Srinivasan, Venkat ; Bai, Jianming ; Wang, Feng ; DOE | Office of Energy Efficiency & Renewable Energy | Wind Energy Technologies Office (U.S. Department of Energy's |
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Zeitschrift: | Nature Communications ; volume 15, issue 1 ; ISSN 2041-1723, 2024 |
Veröffentlichung: | Springer Science and Business Media LLC, 2024 |
Medientyp: | academicJournal |
DOI: | 10.1038/s41467-023-44583-3 |
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