Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion

Heng Zhang; Uxue Oteo; Haijin Zhu; Xabier Judez; Maria Martinez-Ibañez; Itziar Aldalur; Eduardo Sanchez-Diez; Chunmei Li; Javier Carrasco; Maria Forsyth; Michel Armand

doi:10.1002/anie.201813700

Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion

Heng Zhang^*, Uxue Oteo, Haijin Zhu, Xabier Judez, Maria Martinez-Ibañez, Itziar Aldalur, Eduardo Sanchez-Diez, Chunmei Li, Javier Carrasco, Maria Forsyth, Michel Armand

^*Corresponding author for this work

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

60 Scopus citations

Abstract

The anion chemistry of lithium salts plays a pivotal role in dictating the physicochemical and electrochemical performance of solid polymer electrolytes (SPEs), thus affecting the cyclability of all-solid-state lithium metal batteries (ASSLMBs). The bis(trifluoromethanesulfonyl)imide anion (TFSI⁻) has long been studied as the most promising candidate for SPEs; however, the Li-ion conductivities of the TFSI-based SPEs still remain low (Li-ion transference number: ca. 0.2). In this work, we report new hydrogen-containing anions, conceived based on theoretical considerations, as an electrolyte salt for SPEs. SPEs comprising hydrogen-containing anions achieve higher Li-ion conductivities than TFSI-based ones, and those anions are electrochemically stable for various kinds of ASSLMBs (Li–LiFePO₄, Li–S, and Li–O₂ batteries). This opens up a new avenue for designing safe and high-performance ASSLMBs in the future.

Original language	English
Pages (from-to)	7829-7834
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	23
DOIs	https://doi.org/10.1002/anie.201813700
State	Published - 3 Jun 2019
Externally published	Yes

Keywords

Li-ion conductivity
batteries
electrolytes
hydrogen-containing anions
sulfonimide

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10.1002/anie.201813700

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title = "Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion",

abstract = "The anion chemistry of lithium salts plays a pivotal role in dictating the physicochemical and electrochemical performance of solid polymer electrolytes (SPEs), thus affecting the cyclability of all-solid-state lithium metal batteries (ASSLMBs). The bis(trifluoromethanesulfonyl)imide anion (TFSI−) has long been studied as the most promising candidate for SPEs; however, the Li-ion conductivities of the TFSI-based SPEs still remain low (Li-ion transference number: ca. 0.2). In this work, we report new hydrogen-containing anions, conceived based on theoretical considerations, as an electrolyte salt for SPEs. SPEs comprising hydrogen-containing anions achieve higher Li-ion conductivities than TFSI-based ones, and those anions are electrochemically stable for various kinds of ASSLMBs (Li–LiFePO4, Li–S, and Li–O2 batteries). This opens up a new avenue for designing safe and high-performance ASSLMBs in the future.",

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AU - Zhang, Heng

AU - Oteo, Uxue

AU - Zhu, Haijin

AU - Judez, Xabier

AU - Martinez-Ibañez, Maria

AU - Aldalur, Itziar

AU - Sanchez-Diez, Eduardo

AU - Li, Chunmei

AU - Carrasco, Javier

AU - Forsyth, Maria

AU - Armand, Michel

PY - 2019/6/3

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N2 - The anion chemistry of lithium salts plays a pivotal role in dictating the physicochemical and electrochemical performance of solid polymer electrolytes (SPEs), thus affecting the cyclability of all-solid-state lithium metal batteries (ASSLMBs). The bis(trifluoromethanesulfonyl)imide anion (TFSI−) has long been studied as the most promising candidate for SPEs; however, the Li-ion conductivities of the TFSI-based SPEs still remain low (Li-ion transference number: ca. 0.2). In this work, we report new hydrogen-containing anions, conceived based on theoretical considerations, as an electrolyte salt for SPEs. SPEs comprising hydrogen-containing anions achieve higher Li-ion conductivities than TFSI-based ones, and those anions are electrochemically stable for various kinds of ASSLMBs (Li–LiFePO4, Li–S, and Li–O2 batteries). This opens up a new avenue for designing safe and high-performance ASSLMBs in the future.

AB - The anion chemistry of lithium salts plays a pivotal role in dictating the physicochemical and electrochemical performance of solid polymer electrolytes (SPEs), thus affecting the cyclability of all-solid-state lithium metal batteries (ASSLMBs). The bis(trifluoromethanesulfonyl)imide anion (TFSI−) has long been studied as the most promising candidate for SPEs; however, the Li-ion conductivities of the TFSI-based SPEs still remain low (Li-ion transference number: ca. 0.2). In this work, we report new hydrogen-containing anions, conceived based on theoretical considerations, as an electrolyte salt for SPEs. SPEs comprising hydrogen-containing anions achieve higher Li-ion conductivities than TFSI-based ones, and those anions are electrochemically stable for various kinds of ASSLMBs (Li–LiFePO4, Li–S, and Li–O2 batteries). This opens up a new avenue for designing safe and high-performance ASSLMBs in the future.

KW - Li-ion conductivity

KW - batteries

KW - electrolytes

KW - hydrogen-containing anions

KW - sulfonimide

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U2 - 10.1002/anie.201813700

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M3 - 文章

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JO - Angewandte Chemie - International Edition

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ER -

Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion

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