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<p>Li-ion batteries employing graphite anodes have already reached their theoretical limit due to the low capacity of graphite. Nevertheless, alternate anodes using Li metal have gained rapid attention due to its high specific capacity though drawbacks include dendrite formation and surface passivation of the metal anodes. Herein, unlithiated graphite membranes have been employed as protective layers on the Li metal anodes to overcome the surface reaction on the Li metal in a Li/S cell. The diffusion of Li<sup>+</sup> ions through the graphite protective layer has been studied using in situ and ex situ XRD and solid-state NMR technique to understand the feasibility of this concept and the diffusion mechanism in such systems.</p>

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A short insight into the Li-ion diffusion mechanism in graphite protective layers for Li metal batteries

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Marya Baloch,
  • Juan Miguel López del Amo,
  • Cristina Botas,
  • Teofilo Rojo,
  • Michel Armand,
  • Shanmukaraj Devaraj

摘要

Li-ion batteries employing graphite anodes have already reached their theoretical limit due to the low capacity of graphite. Nevertheless, alternate anodes using Li metal have gained rapid attention due to its high specific capacity though drawbacks include dendrite formation and surface passivation of the metal anodes. Herein, unlithiated graphite membranes have been employed as protective layers on the Li metal anodes to overcome the surface reaction on the Li metal in a Li/S cell. The diffusion of Li+ ions through the graphite protective layer has been studied using in situ and ex situ XRD and solid-state NMR technique to understand the feasibility of this concept and the diffusion mechanism in such systems.