Uniform lithium electrodeposition for stable lithium-metal batteries

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Abstract

A lithium-metal composite is proposed, which includes a carbon-nitrogen modified stainless steel mesh (CNSSM) favoring homogeneous lithium-metal nucleation and growth of fresh and dense lithium deposits when employed as anode for lithium-metal batteries. This novel approach is able to overcome the usual drawbacks linked to the preexisting passivation layer at the surface of lithium. Instead, a favorable interphase with low resistivity is formed with the electrolyte, and the CNSSM modified lithium-metal composite (CNSSM-Li) results in low-voltage hysteresis (±24 mV) and allows stable and dendrite-free lithium electrodeposition. The performance of lithium-metal batteries demonstrates the outstanding capabilities of the novel CNSSM-Li electrode in promoting cell energy density and cycling stability. In addition, advanced X-ray nano-tomography is employed to characterize the composition and morphology changes of this electrode upon plating.

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He, X., Yang, Y., Cristian, M. S., Wang, J., Hou, X., Yan, B., … Li, J. (2020). Uniform lithium electrodeposition for stable lithium-metal batteries. Nano Energy, 67. https://doi.org/10.1016/j.nanoen.2019.104172

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