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Photo‐Cross‐Linked Single‐Ion Conducting Polymer Electrolyte for Lithium‐Metal Batteries
Author(s) -
Liang HaiPeng,
Chen Zhen,
Dong Xu,
Zinkevich Tatiana,
Indris Sylvio,
Passerini Stefano,
Bresser Dominic
Publication year - 2022
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202100820
Subject(s) - electrolyte , materials science , propylene carbonate , electrochemical window , ionic conductivity , electrochemistry , lithium (medication) , polymer , ionic liquid , chemical engineering , inorganic chemistry , electrode , chemistry , organic chemistry , composite material , medicine , engineering , endocrinology , catalysis
Polymer electrolytes are considered potential key enablers for lithium‐metal batteries due to their compatibility with the lithium‐metal negative electrode. Herein, cross‐linked self‐standing single‐ion conducting polymer electrolytes are obtained via a facile UV‐initiated radical polymerization using pentaerythritol tetraacrylate as the cross‐linker and lithium (3‐methacryloyloxypropylsulfonyl)‐(trifluoromethylsulfonyl)imide as the ionic functional group. Incorporating propylene carbonate as charge‐transport supporting additive allowed for achieving single‐ion conductivities of 0.21 mS cm −1 at 20 °C and 0.40 mS cm −1 at 40 °C, while maintaining a suitable electrochemical stability window for 4 V‐class positive electrodes (cathodes). As a result, this single‐ion polymer electrolyte featured good cycling stability and rate capability in Li||LiFePO 4 and Li||LiNi 0.6 Mn 0.2 Co 0.2 O 2 cells. These results render this polymer electrolyte as potential alternative to liquid electrolytes for high‐energy lithium‐metal batteries.