Lithium metal anode interface thermal distribution evolution mechanism
Lithium metal batteries are considered to be a favorable choice for high energy density batteries due to its high theoretical compared capacity.However,the interface instability has always been the biggest challenge for the commercial development of lithium metal batteries.The evolution mechanism of the thermal field is a key factor affecting the cyclic life during the evolution of lithium metal interfaces.Here,the heat distribution evolution mechanism of the lithium metal anode interface is revealed and quantified through the solid electrolyte interface(SEI)heat distribution evolution model.The three influencing factors are as follows:the ratio of SEI to the diffusion capacity of electrolytes,the electrolyte properties,the anisotropy in the SEI.The results show that the maximum temperature gradient at an appropriate proportion is relatively small.The concentration of the electrolyte affects the performance of the electrolyte,which will affect the thermal distribution of the lithium metal anode interface.The SEI anisotropy can induce lateral growth of lithium dendrites,which is conducive to uniform distribution of interfacial heat.This work provides certain theoretical guidance for the interface design of lithium metal batteries.
lithium metal anodethermal distributionSEIlithium dendrites
国家科技期刊平台
NSTL
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