Abstract：Solid-state lithium-metal batteries are the most promising next-generation high-energy-density energy storage technology, but one of the most pressing problems they face is the inhomogeneous growth of lithium dendrites. At present, the mechanism of inhibiting the growth of lithium dendrites by low-modulus composite solid-state electrolytes, especially low-modulus multiphase composite solid-state electrolytes, has not been fully clarified. Therefore, in this paper, a force-chemistry model is constructed by the phase field method to investigate the effect of different elastic moduli of three-phase composite solid-state electrolytes on the growth of lithium dendrites, and the results show that the higher the modulus of the electrolyte, the higher the stress on the Li metal, which s the plastic deformation of lithium dendrites, and therefore inhibits the growth of lithium dendrites. The study in this paper deepens the understanding of the mechanism of inhibition of lithium dendrites by low-modulus multiphase composite solid-state electrolytes, and provides guidance for the design of composite solid-state electrolytes.
2024, Vol. 45 
