Abstract:High‐resolution computed tomography (micro‐CT) was used in this paper to visualize the inner structure of lithium nickel cobalt aluminum oxide 18 650 form‐factor batteries non‐destructively after and during a heat endurance test. Open circuit relaxation and electrochemical impedance spectroscopy were also conducted. We tested the different heat‐aged cells with micro‐CT and charge‐discharge and electrochemical impedance spectroscopy measurements to find the observable physical changes in the cell and connect th… Show more
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