Work

A step towards sustainable bio-based solid polymer electrolytes for batteries: Terpene-based block copolymer-nanostructured self-assembly

Year: 2025

Type: article

Abstract: • Novel partially bio-based solid polymer electrolytes B2SPE are elaborated. • Sustainable block copolymers with 40 vol% in a thermoplastic PolyThymylAcrylate block derived from biomass are synthesized • Impacts of Li, Na, and K/TFSI salts on the thermal and ionic conductive properties are investigated. • Nanostructured materials based on the BCP self-assembly with high ionic conductivity • This concept paves the way as a sustainable approach towards bio-based solid polymer electrolyte B2SPE for battery innovation. Herein, novel partially Bio-Based Solid Polymer Electrolytes B2SPE were elaborated by synthesizing block copolymers BCP with a thermoplastic PolyThymylAcrylate (PTA) block derived from biomass and an elastomeric ion conductive Poly(PentaFluoroStyrene- graft -Ethylene Glycol) (PPFS- graft -PEG) block. The copolymers were obtained via Nitroxide Mediated Polymerization NMP of TA and PFS monomers successively, followed by a para -thiol modification of the PPFS block using a PEG-thiol containing 6 ethylene oxide (EO) units. We investigated the effect of different PPFS-PEG proportions in the BCP as well as the used of various bis(trifluoromethanesulfonyl)imide (TFSI) conductive salts (Li, Na, and K) on the thermal and ionic conductive properties of the B2SPEs related to their morphology. Indeed, the evaporative drying induced the self-assembly of the raw Bio-Based Block CoPolymers B2BCPs and their conductive homologues B2SPEs. The B2BCP self-assembly is slightly modified by the addition of TFSI conductive salts whatever the salts nature and content. The Li filled thermoplastic/elastomeric PTA- block -(PPFS- graft -PEG), as LiTFSI-based B2BCP, ionic conductivity was improved significantly by tuning the composition of the copolymer and salt ratio, demonstrating the potential of such nanostructured B2SPEs. This concept paves the way as a sustainable approach towards bio-based solid polymer electrolyte B2SPE with lower carbon footprint for battery innovation.

Source: European Polymer Journal

DOI: 10.1016/j.eurpolymj.2025.113788

Authors: Antoine Aynard, Laurent Billon

Institutions: Centre National de la Recherche Scientifique, Université de Pau et des Pays de l'Adour, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $4,330