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Suppressed mobility of negative charges in polymer electrolytes with an ether-functionalized anion

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journal contribution
posted on 26.08.2019, 00:00 authored by H Zhang, Fangfang ChenFangfang Chen, O Lakuntza, U Oteo, L Qiao, M Martinez-Ibañez, Haijin Zhu, J Carrasco, Maria ForsythMaria Forsyth, M Armand
© 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. 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).

History

Journal

Angewandte chemie - international edition

Volume

58

Issue

35

Pagination

12070 - 12075

Publisher

Wiley

Location

Chichester, Eng.

ISSN

1433-7851

eISSN

1521-3773

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, The Authors