Tuning the properties of a UV-polymerized, cross-linked solid polymer electrolyte for lithium batteries

Preston Sutton; Martino Airoldi; Luca Porcarelli; Jorge L. Olmedo-Martínez; Clément Mugemana; Nico Bruns; David Mecerreyes; Ullrich Steiner; Ilja Gunkel

doi:10.3390/polym12030595

Tuning the properties of a UV-polymerized, cross-linked solid polymer electrolyte for lithium batteries

Preston Sutton^*, Martino Airoldi, Luca Porcarelli, Jorge L. Olmedo-Martínez, Clément Mugemana, Nico Bruns, David Mecerreyes, Ullrich Steiner, Ilja Gunkel

^*Corresponding author for this work

Pure And Applied Chemistry

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

27 Citations (Scopus)

13 Downloads (Pure)

Abstract

Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.

Original language	English
Article number	595
Number of pages	16
Journal	Polymers
Volume	12
Issue number	3
DOIs	https://doi.org/10.3390/polym12030595
Publication status	Published - 5 Mar 2020

Funding

This research was funded by Swiss National Science Foundation through the NRP70 program (153764), and the Adolphe Merkle Foundation (P.S., U.S. and I.G.). L.P. has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sk?odowska-Curie Grant Agreement No. 797295. N.B. and C.M. acknowledge financial support by the Swiss National Science Foundation (projects PP00P2_144697, PP00P2_172927) and by the KTI/CTI (project 18619.1 PFNM-NM).

Keywords

dual-ion and single-ion conductor
lithium batteries
scalable cross-linked polymer
solid polymer electrolytes
tunable matrix
UV polymerization
polymer networks

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10.3390/polym12030595Licence: CC BY 4.0

Sutton-etal-Polymers-2020-Tuning-the-properties-of-a-UV-polymerized-cross-linked-solid-polymer-electrolyteFinal published version, 4.08 MBLicence: CC BY 4.0

Cite this

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abstract = "Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.",

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AU - Mugemana, Clément

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N2 - Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.

AB - Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.

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KW - solid polymer electrolytes

KW - tunable matrix

KW - UV polymerization

KW - polymer networks

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Tuning the properties of a UV-polymerized, cross-linked solid polymer electrolyte for lithium batteries

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