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- W3025704850 endingPage "104889" @default.
- W3025704850 startingPage "104889" @default.
- W3025704850 abstract "Solid electrolyte interphases (SEI) plays a vital role in stabilizing lithium (Li) metal anodes for rechargeable batteries. However, forming robust SEI layers is challenging in the state-of-the-art electrolytes. Herein, we report a long-lasting and dual-function additive (potassium nonafluoro-1-butanesulfonate or KPBS) for dual-salt LiFSI-LiTFSI ether electrolyte. Our work suggests that the electrostatic shield effect from potassium ion (K+) and the F-rich PBS− anions with a middle lowest unoccupied molecular orbital (LUMO) level together promote the formation of a LiF-rich SEI during the Li plating/striping process, which effectively restricts Li dendrite growth and suppresses electrolyte consumption. As a consequence, the designed electrolyte endows small nucleation overpotential, highly reversible Li plating/stripping, and excellent cycling stability. Specifically, with such an electrolyte, Li–Cu cells can maintain stable cycling during 400 cycles at 1 mA cm−2 for 1 mA h cm−2 with a high coulombic efficiency (CE) of 99.1%. Li–LiFePO4 full cells displayed dramatically improved cycling stability after 100 cycles with high CE of 99.6% under relatively lean electrolyte condition (7.5 μL mA h−1), limited Li supply (N/P = 1.2) and high areal capacity (4.1 mA h cm−2)." @default.
- W3025704850 created "2020-05-21" @default.
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- W3025704850 date "2020-09-01" @default.
- W3025704850 modified "2023-10-16" @default.
- W3025704850 title "A long-lasting dual-function electrolyte additive for stable lithium metal batteries" @default.
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- W3025704850 doi "https://doi.org/10.1016/j.nanoen.2020.104889" @default.
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