RECENT ADVANCEMENTS IN QUANTITATIVE MODELING OF COMPOSITE METAL LITHIUM ANODES
Keywords:
Lithium metal battery, Composite metal lithium anode, Theoretical simulation, Mass transfer process, Morphology evolutionAbstract
Lithium metal has extremely high specific capacity and extremely low redox electrode potential, and is one of the core energy Materials in the field of secondary batteries. However, metallic lithium anodes face challenges such as volume expansion and uneven lithium deposition. Introducing a three-dimensional skeleton into the metallic lithium anode to construct a composite lithium anode is an effective method to alleviate volume expansion and regulate lithium deposition. The composite metal lithium anode has complex composition and structure, and the factors affecting the electrochemical reaction are strongly coupled. With the advancement of physical and chemical models and the large-scale improvement of computing levels, numerical model analysis can effectively study the physical and chemical mechanisms in composite lithium anodes. This article first sumMarizes the core process mechanisms that occur in composite metal lithium anodes and reviews the development of physical and chemical models. Then the quantitative model of the electrochemical Mass transfer process such as the surface electric field and ion field of the composite lithium anode was introduced, and the progress of the analysis and control strategies of the dynamic evolution mechanism of lithium deposition morphology based on the phase field model or finite element model was reviewed. The structural stability of the composite lithium anode during cycling was analyzed from the perspective of the electrochemical field. These quantitative model works reveal the electrochemical principles of lithium anodes and promote the efficient screening and optimized design of composite lithium anodes.References
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