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DOE OSTI · 1767140

Ion-Conducting Dynamic Solid Polymer Electrolyte Adhesives

Kato, Ryo·Mirmira, Priyadarshini·Sookezian, Arvin·Grocke, Garrett L.·Patel, Shrayesh N.·Rowan, Stuart J.
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Abstract

Cross-linked polymer electrolytes containing structurally dynamic disulfide bonds have been synthesized to investigate their combined ion transport and adhesive properties. Dynamic network polymers of varying cross-link densities are synthesized via thiol oxidation of a bisthiol monomer, 2,2'-(ethylenedioxy)diethanethiol, and tetrathiol cross-linker, pentaerythritol tetrakis(3-mercaptopropionate). At optimal loading of lithium bis(trifluoromethane-sulfonyl-imide) (LiTFSI) salt, the ionic conductivities (σ) at 90 °C are about 1 × 10–4 and 1 × 10–5 S/cm at the lowest and highest cross-linking, respectively. Notably, in comparison to the equivalent nondynamic network, the dynamic network shows a positive deviation in σ above 90 °C, which suggests the enhancement of ion transport occurs from the difference in structural relaxation on account of the dissociation of disulfide bonds. Lap shear adhesion and conductivity tests on ITO-coated glass substrates reveal the dynamic network exhibits a higher adhesive shear strength of 0.2 MPa (vs 0.03 MPa for the nondynamic network) and higher σ after the application of external stimulus (UV light or heat). The adhesive strength and σ are stable over multiple debonding/rebonding cycles and, thus, demonstrating the utility of these structurally dynamic networks as solid polymer electrolyte adhesives.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYadhesivesdisulfidesdynamic covalent polymersion-conductionlithium-ion-conductionnetworkpolymer-electrolytepolymerssaltsstimulus-responsive

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Kato, Ryo, Mirmira, Priyadarshini, Sookezian, Arvin, Grocke, Garrett L., Patel, Shrayesh N., Rowan, Stuart J.. 2020-03-19. Ion-Conducting Dynamic Solid Polymer Electrolyte Adhesives. https://doi.org/10.1021/acsmacrolett.0c00142

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