Crosslinked polytetrahydrofuran-based solid-state electrolytes with improved mechanical stability and electrochemical performance
Nurgaziyeva E. Mentbayeva A. Bakenov Z. Kalybekkyzy S.
October 2024Elsevier Ltd
Applied Materials Today
2024#40
Solid-state lithium-ion batteries using polymer electrolytes are viewed as a promising approach for the next generation of high-energy-density and safe solid-state batteries. Still, solid polymer electrolytes (SPEs) face real-world application challenges due to poor room temperature performance, inadequate stability, interface contact issues, and low mechanical strength. Herein, we present a novel crosslinked polytetrahydrofuran-based solid-state electrolyte (aPTHF*) with the varying ratios of lithium bis(trifluoromethanesulfonyl)imide salt (LiTFSI), fabricated via UV-photocrosslinking process. To enhance mechanical and chemical stability, aPTHF-based SPE formulations (aPEP) were also produced by incorporating poly(ethylene glycol) diacrylate (PEGDA) and trimethylolpropane ethoxylate triacrylate (ETPTA) oligomers into the structure. The designed unique structure facilitated ion migration, and the highest value of ionic conductivity was 3.16 × 10-5 S·cm-1 at 80 °C for aPEP4 formulation. Fabricated SPEs demonstrated high mechanical strength with a tensile strength of 13 MPa and a broad electrochemical stability window of around 5 V which allowed good interfacial stability with the LFP electrode, showing cycling stability at C/10 in an all-solid-state battery. Moreover, Li|aPEP4|LFP pouch cells were assembled, and the flexible cell and remained functional even after being bent and folded over 20 times. The flexible electrolyte demonstrated in this research offers a promising system for future studies on all-solid-state batteries.
Acrylation , Lithium-ion battery , polytetrahydrofuran , Solid polymer electrolyte , UV-cross-linking
Text of the article Перейти на текст статьи
National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
National Laboratory Astana
Department of Chemical and Materials Engineering
Department of Chemistry
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026