对氟/硫醇点击二嵌段共聚物自组装的高导电固体聚合物电解质：为锂离子导电纳米结构材料铺平道路《ACS Applied Energy Materials》

Highly Conductive Solid Polymer Electrolytes by para-Fluoro/Thiol Clicked Diblock Copolymer Self-Assembly: Paving the Way for Nanostructured Materials for Lithium-Ion Conductivity

Prithwiraj Mandal, Pierre Marcasuzaa, and Laurent Billon*

Universite de Pau et Pays de l'Adour, E2S UPPA, CNRS, Institut des Sciences Analytiques & de Physico-Chimie pour l'Environnement & les Matériaux, UMR5254, 64000Pau, France

Bio-inspired Materials Group: Functionalities & Self-assembly, E2S UPPA, Pau64000, France

ACS Appl. Energy Mater. 2022, XXXX, XXX, XXX-XXX

Publication Date: November 17, 2022

https://doi.org/10.1021/acsaem.2c03089

Abstract

A new class of amorphous solid polymer electrolytes (SPEs) based on polystyrene-b-poly(pentafluorostyrene) (PS-b-PPFS) was prepared via nitroxide-mediated polymerization (NMP) followed by introduction of oligomeric polyethylene glycol (PEG) using para-fluoro/thiol click chemistry. Block copolymers (BCPs) with different combinations of PPFS fractions and degrees of PPFS substitution were synthesized, and the morphologies were studied neat and with Li salt using atomic force microscopy (AFM). Among the various block copolymer electrolytes (BCEs) studied, the electrolyte with a 0.69 volume fraction of PPFS-PEG fully substituted with r = [Li/EO] = 0.08 was the best performing solid electrolyte and exhibited ionic conductivity (σ) from 3.3 × 10–5 to 4.0 × 10–4 S cm–1 at 30 and 70 °C, respectively. The results indicate that well-designed and nanostructured PPFS-PEG-based SPEs can be excellent materials for the construction of all-solid-state Li-ion batteries.

KEYWORDS:

• nitroxide-mediated polymerization

• pentafluorostyrene

• para-fluoro/thiol click chemistry

• nanostructuration

• solid polymer electrolyte

• Li-ion battery

SUBJECTS:

• Copolymers,

• Electrical conductivity,

• Electrolytes,

• Polymers,

• Salts