Photo-Cross-Linked Single-Ion Conducting Polymer Electrolyte for Lithium-Metal Batteries.
Macromol Rapid Commun
; 43(12): e2100820, 2022 Jun.
Article
en En
| MEDLINE
| ID: mdl-35048466
ABSTRACT
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||LiFePO4 and Li||LiNi0.6 Mn0.2 Co0.2 O2 cells. These results render this polymer electrolyte as potential alternative to liquid electrolytes for high-energy lithium-metal batteries.
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MEDLINE
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Macromol Rapid Commun
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2022
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Article