Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes

Maria Martinez-Ibañez; Eduardo Sanchez-Diez; Lixin Qiao; Leire Meabe; Alexander Santiago; Haijin Zhu; Luke A. O'Dell; Javier Carrasco; Maria Forsyth; Michel Armand; Heng Zhang

doi:10.1002/batt.202000045

Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes

Maria Martinez-Ibañez, Eduardo Sanchez-Diez, Lixin Qiao, Leire Meabe, Alexander Santiago, Haijin Zhu, Luke A. O'Dell, Javier Carrasco, Maria Forsyth, Michel Armand, Heng Zhang^*

^*Corresponding author for this work

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

15 Scopus citations

Abstract

A novel single lithium-ion conducting (SLIC) polymer electrolyte containing a weakly coordinating fluorine-free polysalt is presented. The polysalt, lithium poly(4-styrenesulfonyl)(dicyano)methide (LiPSDM), is conceived on the basis of a fluorine-free green chemistry, and motivated by the highly performing non-fluorinated lithium tricyanomethanide (LiTCM) salt. The electrolyte comprising LiPSDM and poly(ethylene oxide) (PEO) shows good thermal stability, decent ionic conductivity, and high lithium transference number. In stark contrast to other fluorine-free polysalts, such as, poly(4-styrenesulfonate) (LiPSS), the replacement of −SO₃⁻ moiety by −SO₂C⁽⁻⁾(CN)₂ improves the flexibility of the anion and the charge delocalization, leading to an improved amorphization of PEO and an overall better performance. Moreover, solid-state nuclear magnetic resonance (NMR) measurements are performed to unravel the role of anion chemistry on the fundamental transport properties of SLICs. The present work is believed to facilitate the design of high-performance fluorine-free polymer electrolytes which are important building blocks for safe, green, and sustainable battery technologies.

Original language	English
Pages (from-to)	738-746
Number of pages	9
Journal	Batteries and Supercaps
Volume	3
Issue number	8
DOIs	https://doi.org/10.1002/batt.202000045
State	Published - 1 Aug 2020
Externally published	Yes

Keywords

lithium batteries
lithium poly(4-styrenesulfonyl)(dicyano)methide
single lithium-ion conductor
solid polymer electrolytes

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10.1002/batt.202000045

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title = "Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes",

abstract = "A novel single lithium-ion conducting (SLIC) polymer electrolyte containing a weakly coordinating fluorine-free polysalt is presented. The polysalt, lithium poly(4-styrenesulfonyl)(dicyano)methide (LiPSDM), is conceived on the basis of a fluorine-free green chemistry, and motivated by the highly performing non-fluorinated lithium tricyanomethanide (LiTCM) salt. The electrolyte comprising LiPSDM and poly(ethylene oxide) (PEO) shows good thermal stability, decent ionic conductivity, and high lithium transference number. In stark contrast to other fluorine-free polysalts, such as, poly(4-styrenesulfonate) (LiPSS), the replacement of −SO3− moiety by −SO2C(−)(CN)2 improves the flexibility of the anion and the charge delocalization, leading to an improved amorphization of PEO and an overall better performance. Moreover, solid-state nuclear magnetic resonance (NMR) measurements are performed to unravel the role of anion chemistry on the fundamental transport properties of SLICs. The present work is believed to facilitate the design of high-performance fluorine-free polymer electrolytes which are important building blocks for safe, green, and sustainable battery technologies.",

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author = "Maria Martinez-Iba{\~n}ez and Eduardo Sanchez-Diez and Lixin Qiao and Leire Meabe and Alexander Santiago and Haijin Zhu and O'Dell, {Luke A.} and Javier Carrasco and Maria Forsyth and Michel Armand and Heng Zhang",

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T1 - Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes

AU - Martinez-Ibañez, Maria

AU - Sanchez-Diez, Eduardo

AU - Qiao, Lixin

AU - Meabe, Leire

AU - Santiago, Alexander

AU - Zhu, Haijin

AU - O'Dell, Luke A.

AU - Carrasco, Javier

AU - Forsyth, Maria

AU - Armand, Michel

AU - Zhang, Heng

PY - 2020/8/1

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N2 - A novel single lithium-ion conducting (SLIC) polymer electrolyte containing a weakly coordinating fluorine-free polysalt is presented. The polysalt, lithium poly(4-styrenesulfonyl)(dicyano)methide (LiPSDM), is conceived on the basis of a fluorine-free green chemistry, and motivated by the highly performing non-fluorinated lithium tricyanomethanide (LiTCM) salt. The electrolyte comprising LiPSDM and poly(ethylene oxide) (PEO) shows good thermal stability, decent ionic conductivity, and high lithium transference number. In stark contrast to other fluorine-free polysalts, such as, poly(4-styrenesulfonate) (LiPSS), the replacement of −SO3− moiety by −SO2C(−)(CN)2 improves the flexibility of the anion and the charge delocalization, leading to an improved amorphization of PEO and an overall better performance. Moreover, solid-state nuclear magnetic resonance (NMR) measurements are performed to unravel the role of anion chemistry on the fundamental transport properties of SLICs. The present work is believed to facilitate the design of high-performance fluorine-free polymer electrolytes which are important building blocks for safe, green, and sustainable battery technologies.

AB - A novel single lithium-ion conducting (SLIC) polymer electrolyte containing a weakly coordinating fluorine-free polysalt is presented. The polysalt, lithium poly(4-styrenesulfonyl)(dicyano)methide (LiPSDM), is conceived on the basis of a fluorine-free green chemistry, and motivated by the highly performing non-fluorinated lithium tricyanomethanide (LiTCM) salt. The electrolyte comprising LiPSDM and poly(ethylene oxide) (PEO) shows good thermal stability, decent ionic conductivity, and high lithium transference number. In stark contrast to other fluorine-free polysalts, such as, poly(4-styrenesulfonate) (LiPSS), the replacement of −SO3− moiety by −SO2C(−)(CN)2 improves the flexibility of the anion and the charge delocalization, leading to an improved amorphization of PEO and an overall better performance. Moreover, solid-state nuclear magnetic resonance (NMR) measurements are performed to unravel the role of anion chemistry on the fundamental transport properties of SLICs. The present work is believed to facilitate the design of high-performance fluorine-free polymer electrolytes which are important building blocks for safe, green, and sustainable battery technologies.

KW - lithium batteries

KW - lithium poly(4-styrenesulfonyl)(dicyano)methide

KW - single lithium-ion conductor

KW - solid polymer electrolytes

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Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes

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