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- W4293255773 abstract "Different lithium salt (lithium bis(fluorosulfonyl) imide (LiFSI)/LiPF6 9/1 mol ratio) concentrations in carbonate electrolyte were studied on the fast charging performance of LiNi0.6Mn0.2Co0.2O2 (NMC622)/graphite pouch cells. The cells with electrolyte concentration from 0.75 M to 1.50 M showed similar fast charging capabilities. Further increase of the concentration to 1.75 M and 2.00 M decreased the attainable capacity in fast charging. In the long-term cycling test, the capacity retention after 200 fast charging cycles increased with the increase of salt concentration in electrolyte. Cells with 1.5 M electrolyte showed the best overall performance in fast charging capacity and long-term cycling. Li platings were observed in the cells with 0.75 M, 1.00 M and 1.25 M electrolyte. It was improved with greatly reduced Li plating area in 1.50 M, and no Li plating at all in 1.75 M and 2.00 M electrolyte. Post-mortem analysis such as neutron powder diffraction (NPD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the electrode after cycling. It suggests that electrolyte concentration needs to be optimized for a given cell configuration with specific electrode and loading." @default.
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- W4293255773 date "2022-10-01" @default.
- W4293255773 modified "2023-10-06" @default.
- W4293255773 title "Understanding the effect of salt concentrations on fast charging performance of Li-ion cells" @default.
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- W4293255773 doi "https://doi.org/10.1016/j.jpowsour.2022.231863" @default.
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