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This document summarizes research on aging mechanisms in Li-ion batteries. It outlines a multi-scale characterization plan to understand aging effects at different length scales and as a function of aging progress. Testing included cell cycling to age batteries, thermography to map degradation, SEM to examine particle coarsening, and AFM to measure increased surface resistance with aging. Particle coarsening was found to decrease porosity and surface area, increasing thermal diffusivity and resistance.

Author

Justyou Xu

Language

EN