TY  - JOUR
AU  - Rudolf, Katharina
AU  - Voigt, Linus
AU  - Muench, Simon
AU  - Frankenstein, Lars
AU  - Landsmann, Justin
AU  - Schubert, Ulrich S.
AU  - Winter, Martin
AU  - Placke, Tobias
AU  - Kasnatscheew, Johannes
TI  - Radical Polymer‐based Positive Electrodes for Dual‐Ion Batteries: Enhancing Performance with γ‐Butyrolactone‐based Electrolytes
JO  - ChemSusChem
VL  - 17
IS  - 17
SN  - 1864-5631
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2024-05232
SP  - e202400626
PY  - 2024
N1  - The authors acknowledge the German research foundation (DFG) for funding within the priority program SPP 2248 “Polymer-based Batteries.
AB  - Dual-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.
LB  - PUB:(DE-HGF)16
C6  - 38747027
UR  - <Go to ISI:>//WOS:001248815400001
DO  - DOI:10.1002/cssc.202400626
UR  - https://juser.fz-juelich.de/record/1030122
ER  -