zhu-weaklycoordinating-2020.pdf (4.38 MB)
Weakly Coordinating Fluorine-Free Polysalt for Single Lithium-Ion Conductive Solid Polymer Electrolytes
journal contribution
posted on 2020-05-13, 00:00 authored by Maria Martinez-Ibanez, Eduardo Sanchez-Diez, Lixin Qiao, Leire Meabe, Alexander Santiago, Haijin Zhu, Luke O'DellLuke O'Dell, Javier Carrasco, Maria ForsythMaria Forsyth, Michel Armand, Heng ZhangA 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.
History
Journal
Batteries & SupercapsVolume
3Pagination
1 - 10Publisher
WileyLocation
Weinheim, GermanyPublisher DOI
Link to full text
eISSN
2566-6223Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2020, Wiley‐VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
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