期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 35, 页码 12070-12075出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201905794
关键词
batteries; electrolytes; ether-functionalized anions; negative charge mobility
资金
- Ministerio de Economia y Competitividad (MINECO) of the Spanish Government through Proyectos I + D Retos program [ENE2015-64907C2-1-R, ENE2016-81020-R]
- European Union [769929]
- Basque Government through the GVELKARTEK-2016 program
- Basque Government [1-AFW-2017-2]
- Chinese Scholarship Council [201808370162]
- Australian Government
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 offers a facile and elegant methodology on accessing selective and efficient Li-ion transport in PEs and related electrolyte materials (for example, composites and hybrid electrolytes).
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