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Stabilizing Lithium Metal Anodes by Fiber Clustering. | LitMetric

Stabilizing Lithium Metal Anodes by Fiber Clustering.

Inorg Chem

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.

Published: December 2024

AI Article Synopsis

Article Abstract

Lithium metal anodes generally suffer from uncontrolled dendrite growth and large volume change, while traditional skeletons such as LiIn and LiSn are too heavy and discontinuous to offer highly efficient structural supportability for composite Li anodes. In this work, lightweight and stable fiber-clustered skeletons, which are composed of LiB fibers and jointed LiSi nanoparticles, can be obtained by smelting SiB powder and Li ingots. In addition to serving as both ionic and electronic conductors for composite Li anodes, the stable skeletons reduced volumetric fluctuation by offering uniform, heterogeneous, and continuous architectures while suppressing lithium dendrites with low nucleation overpotential and diffusion energy barrier. As a result, the Li-SiB|Li-SiB symmetrical cells achieve an ultralong lifespan over 2000 h cycling at 1 mA cm and 1 mA h cm. Eventually, the Li-SiB|LiFePO full cells exhibit a long-term cyclability of 400 cycles with a high-capacity retention of 94.5% at 2 C, and the Li-SiB|LiCoO pouch cells exhibit an impressive 85% capacity retention after 350 cycles. This work develops a new strategy to strengthen the stability of fibrous skeletons and minimize volume changes for dendrite-free Li metal anodes.

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Source
http://dx.doi.org/10.1021/acs.inorgchem.4c03719DOI Listing

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