Suppressed Mobility of Negative Charges in Polymer Electrolytes with an Ether-Functionalized Anion.

ABSTRACT: Suppressing the mobility of anionic species in polymer electrolytes (PEs) is essential for mitigating the concentration gradient and internal cell polarization, and thereby improving the stability and cycle life of rechargeable alkali metal batteries. Now, an ether-functionalized anion (EFA) is used as a counter-charge in a lithium salt. As the salt component in PEs, it achieves low anionic diffusivity but sufficient Li-ion conductivity. The ethylene oxide unit in EFA endows nanosized self-agglomeration of anions and trapping interactions between the anions and its structurally homologous matrix, poly(ethylene oxide), thus suppressing the mobility of negative charges. In contrast to previous strategies of using anion traps or tethering anions to a polymer/inorganic backbone, this work offe

SUBMITTER: Zhang H 

PROVIDER: S-EPMC6771960 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature