Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.139
Publication date: 11th July 2022
Solid polymer electrolytes based on poly(ethylene oxide) (PEO) are of considerable interest in lithium metal batteries. Electrolytes with high modulus are essential for enabling high specific energy batteries with lithium metal anodes [1]. One approach for obtaining high modulus electrolytes is through the use of microphase separated block copolymers comprising a structural block to provide mechanical rigidity (block A) and a soft conducting block to provide avenues for ion transport (block B) [2]. Block copolymers self-assembly into different morphologies such as lamellae, bicontinuous gyroid networks, cylinders arranged on a hexagonal lattice, and spheres arranged on a body-centered-cubic lattice. The ionic conductivity of a block copolymer electrolyte should increase with the volume fraction of the conducting phase. Herein, we explore the impact of several polymers (PS, PMA-POSS, etc.), lithium salts (LiTFSI, POSS-LiTFSI, etc.) and volume fractions of the conducting phase on morphology, mechanical and electrochemical properties of nanostructured block copolymer electrolytes [3,4].
References
1 Soo, P.P; Huang, B.; Jang, Y.; Chiang, Y.M.; Sadoway, D.R.; Mayes. A.M. Rubbery block copolymer electrolytes for solid‐state rechargeable lithium batteries. J. Electrochem. Soc. 1999, 146, 32.
2 Hallinan, D.T.; Villaluenga I.; Balsara N.P. Polymer and Composite Electrolytes. MRS Bulletin, 2018, 43, 759.
3 Sethi, G.; Jiang, X.; Chakraborty, R.D.; Villaluenga, I.; Balsara, N.P. Anomalous Self-Assembly and Ion Transport in Organic-Inorganic Block Copolymer Electrolytes. ACS Macro Letters, 2018, 7, 1056.
4 Villaluenga, I.; Inceoglu, S.; Jiang, X.; Chen,X.C.; Chintapalli, M.; Wang, D.R.; Devaux, D.; Balsara, N.P. Nanostructured Single-Ion-Conducting Hybrid Electrolytes based on Salty Nanoparticles and Block Copolymers. Macromolecules, 2017, 50, 1998.
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