Home > Workflow collections > Publication Charges > Coordinating Anions “to the Rescue” of the Lithium Ion Mobility in Ternary Solid Polymer Electrolytes Plasticized With Ionic Liquids > print |
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037 | _ | _ | |a FZJ-2023-01300 |
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100 | 1 | _ | |a Hoffknecht, Jan-Philipp |0 P:(DE-HGF)0 |b 0 |
245 | _ | _ | |a Coordinating Anions “to the Rescue” of the Lithium Ion Mobility in Ternary Solid Polymer Electrolytes Plasticized With Ionic Liquids |
260 | _ | _ | |a Weinheim |c 2023 |b Wiley-VCH |
336 | 7 | _ | |a article |2 DRIVER |
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520 | _ | _ | |a Lithium salts with low coordinating anions such as bis(trifluoromethanesulfonyl)imide (TFSI) have been the state-of-the-art for polyethylene oxide (PEO)-based “dry” polymer electrolytes for 3 decades. Plasticizing PEO with TFSI-based ionic liquids (ILs) to form ternary solid polymer electrolytes (TSPEs) increases conductivity and Li+ diffusivity. However, the Li+ transport mechanism is unaffected compared to their “dry” counterparts and is essentially coupled to the dynamics of the polymer host matrix, which limits Li+ transport improvement. Thus, a paradigm shift is hereby suggested: the utilization of more coordinating anions such as trifluoromethanesulfonyl-N-cyanoamide (TFSAM), able to compete with PEO for Li+ solvation, to accelerate the Li+ transport and reach a higher Li+ transference number. The Li–TFSAM interaction in binary and ternary TFSAM-based electrolytes is probed by experimental methods and discussed in the context of recent computational results. In PEO-based TSPEs, TFSAM drastically accelerates the Li+ transport (increases Li+ transference number by a factor 6 and the Li+ conductivity by 2–3) and computer simulations reveal that lithium dynamics are effectively re-coupled from polymer to anion dynamics. Last, this concept of coordinating anions in TSPEs is successfully applied in LFP||Li metal cells leading to enhanced capacity retention (86% after 300 cycles) and an improved rate performance at 2C. |
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700 | 1 | _ | |a Wettstein, Alina |0 0000-0003-2693-3653 |b 1 |
700 | 1 | _ | |a Atik, Jaschar |0 P:(DE-Juel1)174235 |b 2 |
700 | 1 | _ | |a Krause, Christian |b 3 |
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700 | 1 | _ | |a Brunklaus, Gunther |0 P:(DE-Juel1)172047 |b 5 |
700 | 1 | _ | |a Winter, Martin |0 P:(DE-Juel1)166130 |b 6 |
700 | 1 | _ | |a Diddens, Diddo |0 P:(DE-Juel1)169877 |b 7 |e Corresponding author |
700 | 1 | _ | |a Heuer, Andreas |0 P:(DE-Juel1)176646 |b 8 |e Corresponding author |
700 | 1 | _ | |a Paillard, Elie |0 P:(DE-Juel1)166311 |b 9 |
773 | _ | _ | |a 10.1002/aenm.202202789 |g Vol. 13, no. 1, p. 2202789 - |0 PERI:(DE-600)2594556-7 |n 1 |p 2202789 - |t Advanced energy materials |v 13 |y 2023 |x 1614-6832 |
856 | 4 | _ | |u https://juser.fz-juelich.de/record/1005101/files/Advanced%20Energy%20Materials%20-%202022%20-%20Hoffknecht%20-%20Coordinating%20Anions%20to%20the%20Rescue%20of%20the%20Lithium%20Ion%20Mobility%20in%20Ternary.pdf |y OpenAccess |
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