PTHF/LATP Composite Polymer Electrolyte for Solid State Batteries
Nurgaziyeva E. Turlybay G. Tugelbayeva A. Mentbayeva A. Kalybekkyzy S.
November 2024Multidisciplinary Digital Publishing Institute (MDPI)
Polymers
2024#16Issue 22
The novel crosslinked composite polymer electrolyte (CPE) was developed and investigated using polytetrahydrofuran (PTHF) and polyethyleneglycol diacrylate (PEGDA), incorporating lithium aluminum titanium phosphate (LATP) particles and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. Composite polymer electrolytes (CPEs) for solid-state lithium-ion batteries (LIBs) were synthesized by harnessing the synergistic effects of PTHF crosslinking and the addition of LATP ceramics, while systematically varying the film composition and LATP content. CPEs containing 15 wt% LATP (PPL15) demonstrated improved mechanical strength and electrochemical stability, achieving a high conductivity of 1.16 × 10−5 S·cm−1 at 80 °C, outperforming conventional PEO-based polymer electrolytes. The CPE system effectively addresses safety concerns and mitigates the rapid degradation typically associated with polyether electrolytes. The incorporation of PEGDA not only enhances mechanical stability but also facilitates lithium salt dissociation and ion transport, leading to a uniform microstructure free from agglomerated particles. The temperature-dependent ionic conductivity measurements indicated optimal performance at lower LATP concentrations, highlighting the impact of ceramic particle agglomeration onion transport pathways. These findings contribute to advancing solid-state battery systems toward practical application.
ceramic particles , composite polymer electrolytes , LATP , lithium-ion batteries , NASICON-type
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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
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