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Tao Gao1 William C. Chueh2 Martin Bazant1

1, Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
2, Material Science, Stanford University, Palo Alto, California, United States

Li plating in graphite anode has been identified as a major hurdle preventing fast charging and long cycling Li ion battery. The competition between the desired Li intercalation and the undesired Li plating in graphite anode during battery charging at high rate or low temperature is a complex process subject to material dynamics (solid diffusion, interfacial charge transfer reaction) as well as porous electrode dynamics (electrolyte transport, population dynamics etc.) . To establish a systematic understanding, perspectives at both the single particle scale as well as the porous electrode scale are important. This works focuses on look at Li plating at single partilce scale, aiming to understand material response under various electrical and thermal stimulus, and clarifying the interplay of solid diffusion and interfacial charge transfer reaction in determining the competition between Li plating and intercalation.

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