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Open Access Publications from the University of California

Uniform lithium electrodeposition for stable lithium-metal batteries

  • Author(s): He, X;
  • Yang, Y;
  • Cristian, MS;
  • Wang, J;
  • Hou, X;
  • Yan, B;
  • Li, J;
  • Zhang, T;
  • Paillard, E;
  • Swietoslawski, M;
  • Kostecki, R;
  • Winter, M;
  • Li, J
  • et al.
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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