Polymer-in-"quasi-ionic liquid" electrolytes for high-voltage lithium metal batteries
Journal Article
·
· Advanced Energy Materials
- BATTELLE (PACIFIC NW LAB)
- U.S. Army Research Laboratory
- UNIVERSITY PROGRAMS
- U. S. Army Research Laboratory
Due to the limited oxidation stability (< 4 V) of ether oxygen, PEO-based polymer electrolytes are not compatible with high-voltage (> 4 V) cathodes, restricting the energy density of lithium (Li) metal batteries. Here, we design a new type of polymer in quasi-ionic liquid electrolyte (PQILE) that reduces the lone electron pairs of ether oxygens from PEO and ether solvent, induces the formation of stable interfacial layers on both surfaces of LiNi1/3Mn1/3Co1/3O2 cathode and Li metal anode, resulting in a capacity retention of 88.4%, 86.7% and 79.2% after 300 cycles with the charge cutoff voltage of 4.2, 4.3 and 4.4 V, respectively. It’s promising to use quasi-ionic liquids to design new polymer electrolytes for high-voltage and high-specific-energy Li metal batteries.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1576774
- Report Number(s):
- PNNL-SA-144443
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 41 Vol. 9
- Country of Publication:
- United States
- Language:
- English
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