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Instability of lithium bis(fluorosulfonyl)imide (LiFSI)–potassium bis(fluorosulfonyl)imide (KFSI) system with LiCoO2 at high voltage
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Zhang Shu a), Li Wen-Jun a), Ling Shi-Gang a), Li Hong† a) , Zhou Zhi-Bin b), Chen Li-Quan a) |
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| TEM images of (a) pristine LiCoO2 particle, (b) LiCoO2 particle after 20 charge-discharge cycles for Li/LiFSI–KFSI ( χ LiFSI: χ KFSI = 0.41: 0.59)/LiCoO2 cell at a charge/discharge rate of 0.2/0.2 C at 80 °C, (c) pristine LiFePO4 particle, and (d) LiFePO4 particle after 20 charge-discharge cycles for Li/LiFSI–KFSI ( χ LiFSI: χ KFSI = 0.41: 0.59)/LiFePO4 cell at a charge/discharge rate of 0.2/0.2 C at 80 °C. |
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