Due to the limited oxidation stability ( 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.
Revised: December 3, 2019 |
Published: November 6, 2019
Citation
Wu H., Y. Xu, X. Ren, B. Liu, M.H. Engelhard, M.S. Ding, and P.Z. El-Khoury, et al. 2019.Polymer-in-"quasi-ionic liquid electrolytes for high-voltage lithium metal batteries." Advanced Energy Materials 9, no. 41:1902108.PNNL-SA-144443.doi:10.1002/aenm.201902108