Abstract/Description

This dataset comprises 76 Powerstream LiR 2032 lithium cobalt oxide/graphite (LCO/Gr) coin cells used to study Coulombic efficiency and long-term degradation under fast charging conditions. The dataset includes 40 cells tested using SOC-sweep experiments and 36 cells evaluated using benchmark fast charging protocols. SOC-sweep experiments were conducted at four target SOH levels (100%, 90%, 80%, and 70%) and across multiple charging C-rates (1.5C–3.5C) to characterize the dependence of Coulombic efficiency on SOC, C-rate, and SOH. Benchmark tests were designed to assess protocol-dependent degradation and consisted of repeated blocks of charge-discharge cycling followed by reference performance tests (RPTs) to measure capacity. Each benchmark block contains four full charge-discharge cycles, and testing was continued until an end-of-life criterion of 70% remaining capacity. All experiments were performed under controlled ambient conditions (~25 °C). Additional details on the protocols are provided in Navidi et al. (DOI to be added soon) and the “README.txt” file attached.

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