%0 Journal Article %T Improved Solid Electrolyte Conductivity via Macromolecular Self-Assembly: From Linear to Star Comb-like P(S- co -BzMA)- b -POEGA Block Copolymers %+ Université de Pau et des Pays de l'Adour (UPPA) %+ Aalto University %+ Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) %A Aniagbaoso, Kingsley Ikenna %A Król, Monika %A Ruokolainen, Janne %A Bousquet, Antoine %A Save, Maud %A Rubatat, Laurent %< avec comité de lecture %@ 1944-8244 %J ACS Applied Materials & Interfaces %I Washington, D.C. : American Chemical Society %V 15 %N 12 %P 15998-16008 %8 2023-03-29 %D 2023 %R 10.1021/acsami.2c22766 %K Battery %K Block copolymers %K Star architecture %K Self-assembly %K Solid polymer electrolyte %K Battery Solid polymer electrolyte Block copolymers Star architecture Self-assembly %Z Chemical Sciences %Z Chemical Sciences/PolymersJournal articles %X Star block copolymer electrolyte with lithium ion conducting phase are investigated in the presentwork to assess the influence of this complex architecture compared to the linear one, on both, bulkmorphology and ionic conductivity. For that purpose, the controlled synthesis of a series ofpoly(styrene-co-benzyl methacrylate)-b-poly[oligo(ethylene glycol) methyl ether acrylate] (P(S-co-BzMA)-b-POEGA) block copolymers (BCPs) by RAFT polymerization was performed from eithera monofunctional or a tetrafunctional chain transfer agent (CTA) containing trithiocarbonate groups.We emphasized how a small amount of styrene (6 mol-%) improved drastically the control of theRAFT polymerization of benzyl methacrylate mediated by the tetrafunctional CTA. Transmissionelectron microscopy (TEM) and small angle X-ray scattering (SAXS) demonstrated a clearsegregation of the BCPs in the presence of lithium salt. Interestingly, the star BCPs gave rise to highlyordered lamellar structures compared to the linear analogue. Consequently, the reduced lamellaetortuosity of self-assembled star BCPs improved the lithium conductivity by more than 8 times at30°C for ̴ 30 wt-% of POEGA conductive phase. %G English %2 https://univ-pau.hal.science/hal-04050926/document %2 https://univ-pau.hal.science/hal-04050926/file/Rubatat%20Final_Version_Manuscript_HAL.pdf %L hal-04050926 %U https://univ-pau.hal.science/hal-04050926 %~ CNRS %~ UNIV-PAU %~ OPENAIRE %~ IPREM %~ INC-CNRS %~ IPREM-PCM %~ UPPA-OA %~ TEST2-HALCNRS