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001030122 1001_ $$aRudolf, Katharina$$b0
001030122 245__ $$aRadical Polymer‐based Positive Electrodes for Dual‐Ion Batteries: Enhancing Performance with γ‐Butyrolactone‐based Electrolytes
001030122 260__ $$aWeinheim$$bWiley-VCH$$c2024
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001030122 500__ $$aThe authors acknowledge the German research foundation (DFG) for funding within the priority program SPP 2248 “Polymer-based Batteries.
001030122 520__ $$aDual-ion batteries (DIBs) represent a promising alternative for lithium ion batteries (LIBs) for various niche applications. DIBs with polymer-based active materials, here poly(2,2,6,6-tetramethylpiperidinyl-N-oxyl methacrylate) (PTMA), are of particular interest for high power applications, though they require appropriate electrolyte formulations. As the anion mobility plays a crucial role in transport kinetics, Li salts are varied using the well-dissociating solvent γ-butyrolactone (GBL). Lithium difluoro(oxalate)borate (LiDFOB) and lithium bis(oxalate)borate (LiBOB) improve cycle life in PTMA||Li metal cells compared to other Li salts and a LiPF6- and carbonate-based reference electrolyte, even at specific currents of 1.0 A g−1 (≈10C), whereas LiDFOB reveals a superior rate performance, i. e., ≈90 % capacity even at 5.0 A g−1 (≈50C). This is attributed to faster charge-transfer/mass transport, enhanced pseudo-capacitive contributions during the de-/insertion of the anions into the PTMA electrode and to lower overpotentials at the Li metal electrode.
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001030122 7001_ $$aVoigt, Linus$$b1
001030122 7001_ $$00000-0003-3710-4682$$aMuench, Simon$$b2
001030122 7001_ $$aFrankenstein, Lars$$b3
001030122 7001_ $$aLandsmann, Justin$$b4
001030122 7001_ $$00000-0003-4978-4670$$aSchubert, Ulrich S.$$b5
001030122 7001_ $$0P:(DE-Juel1)166130$$aWinter, Martin$$b6
001030122 7001_ $$00000-0002-2097-5193$$aPlacke, Tobias$$b7
001030122 7001_ $$0P:(DE-Juel1)171865$$aKasnatscheew, Johannes$$b8$$eCorresponding author
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