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

Heng Zhang; Fangfang Chen; Oier Lakuntza; Uxue Oteo; Lixin Qiao; Maria Martinez-Ibañez; Haijin Zhu; Javier Carrasco; Maria Forsyth; Michel Armand

doi:10.1002/anie.201905794

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

Heng Zhang^*, Fangfang Chen, Oier Lakuntza, Uxue Oteo, Lixin Qiao, Maria Martinez-Ibañez, Haijin Zhu, Javier Carrasco, Maria Forsyth, Michel Armand

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

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 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).

Original language	English
Pages (from-to)	12070-12075
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	35
DOIs	https://doi.org/10.1002/anie.201905794
State	Published - 26 Aug 2019
Externally published	Yes

Keywords

batteries
electrolytes
ether-functionalized anions
negative charge mobility

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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 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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AU - Zhang, Heng

AU - Chen, Fangfang

AU - Lakuntza, Oier

AU - Oteo, Uxue

AU - Qiao, Lixin

AU - Martinez-Ibañez, Maria

AU - Zhu, Haijin

AU - Carrasco, Javier

AU - Forsyth, Maria

AU - Armand, Michel

PY - 2019/8/26

Y1 - 2019/8/26

N2 - 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).

AB - 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).

KW - batteries

KW - electrolytes

KW - ether-functionalized anions

KW - negative charge mobility

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

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