001     894582
005     20240712113122.0
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100 1 _ |a Li, Jie
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245 _ _ |a Stabilizing the solid‐electrolyte interphase with polyacrylamide for high‐voltage aqueous lithium‐ion batteries
260 _ _ |a Weinheim
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520 _ _ |a The introduction of “water-in-salt” electrolyte (WiSE) concept opens a new horizon to aqueous electrochemistry that is benefited from the formation of a solid-electrolyte interphase (SEI). However, such SEI still faces multiple challenges, including dissolution, mechanical damaging, and incessant reforming, which result in poor cycling stability. Here, we report a polymeric additive, polyacrylamide (PAM) that effectively stabilizes the interphase in WiSE. With the addition of 5 molar % PAM to 21 mol kg-1 LiTFSI electrolyte, a LiMn2O4L-TiO2 full cell exhibits enhanced cycling stability with 86% capacity retention after 100 cycles at 1 C. The formation mechanism and evolution of PAM-assisted SEI was investigated using operando small angle neutron scattering and density functional theory (DFT) calculations, which reveal that PAM minimizes the presence of free water molecules at the anode/electrolyte interface, accelerates the TFSI- anion decomposition, and densifies the SEI.
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700 1 _ |a Hou, Xu
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700 1 _ |a Wang, Rui
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700 1 _ |a He, Xin
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700 1 _ |a Pollard, Travis P
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700 1 _ |a Ju, Xiaokang
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700 1 _ |a Du, Leilei
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700 1 _ |a Paillard, Elie
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700 1 _ |a Frielinghaus, Henrich
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700 1 _ |a Barnsley, Lester C.
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700 1 _ |a Borodin, Oleg
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700 1 _ |a Xu, Kang
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700 1 _ |a Winter, Martin
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773 _ _ |a 10.1002/anie.202107252
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856 4 _ |u https://juser.fz-juelich.de/record/894582/files/Angew%20chemie_Manuscript_WiSE-PAM-20210727.pdf
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