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Cobalt-free composite-structured cathodes with lithium-stoichiometry control for sustainable lithium-ion batteries

Chemistry

Cobalt-free composite-structured cathodes with lithium-stoichiometry control for sustainable lithium-ion batteries

K. Chen, P. Barai, et al.

Discover how researchers from Brookhaven National Laboratory and Argonne National Laboratory have synthesized a novel Li-deficient composite-structured cathode, LiNi₀.₉₅Mn₀.₀₅O₂, potentially eliminating cobalt reliance in lithium-ion batteries. This breakthrough exhibits exceptional performance metrics, such as 90% capacity retention across 100 cycles, paving the way for sustainable battery technology.

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Playback language: English
Abstract
Lithium-ion batteries are crucial for decarbonizing transportation and power grids, but their reliance on cobalt raises sustainability concerns. This paper reports on stoichiometry control in synthesizing Li-deficient composite-structured LiNi<sub>0.95</sub>Mn<sub>0.05</sub>O₂, which outperforms traditional layered counterparts. Li-deficiency suppresses phase transformation and crystal growth, leading to small composites with low anisotropic lattice expansion/contraction. The Li-deficient LiNi<sub>0.95</sub>Mn<sub>0.05</sub>O₂ shows 90% first-cycle Coulombic efficiency, 90% capacity retention, and minimal voltage fade over 100 deep cycles, suggesting its potential as a cobalt-free cathode.
Publisher
Nature Communications
Published On
Jan 10, 2024
Authors
Ke Chen, Pallab Barai, Ozgenur Kahvecioglu, Lijun Wu, Krzysztof Z. Pupek, Mingyuan Ge, Lu Ma, Steven N. Ehrlich, Hui Zhong, Yimei Zhu, Venkat Srinivasan, Jianming Bai, Feng Wang
Tags
Lithium-ion batteries
cobalt-free
Li-deficient
cathode materials
energy storage
sustainability
phase transformation

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