ABSTRACT High mechanical strength and ionic conductivity of solid-state electrolyte (SSE) are currently conflicting targets that are very difficult to achieve. Polyethylene oxide (PEO) is one of the most common polymers adopted for SSE because of its very high ionic conductivity, but its mechanical strength is very low. This work discusses the manufacturing and testing of PEO blends using polysulfone (PSf) and Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to assess the mechanical response under microtensile testing and the ionic conductivity with electrochemical impedance spectroscopy (EIS). Mechanical tests demonstrated a beneficial effect of LiTFSI with significant increase in maximum stress and ductility measured as strain at failure. The blending of PEO and PSf showed promising conductivity values at room temperature with the 90–10 PEO-PSf composition achieving the highest value (1.06 × 10−6 S/cm) and for the 70–30 composition achieving the highest maximum stress (3.5 MPa) with a conductivity of 3.12 × 10−7 S/cm.

https://doi.org/10.1080/25740881.2023.2180391

PEO-based polymer blend electrolyte for composite structural battery

Abstract In this work, Lithium-ion conducting polymer gel electrolytes (PGE) based on heat resistant polymethylmethacrylate (PMMA), succinonitrile (SN) solvent and Lithium perchlorate (LiClO 4 ) salt in different molarities have been prepared using solution casting technique. The effect of varying LiClO 4 salt within the heat resistant PMMA matrix containing SN solvent is investigated. The PGE with PMMA/SN matrix and 1.5 M LiClO 4 salt demonstrated a maximum ionic conductivity of 4.9 × 10 -5 S cm -1 at room temperature. The dielectric constant and dielectric loss values for each PGEs is found to be more towards high frequency side due to prevalent polarising effects. The ion-dynamics using electroanalytical studies reveals that PGE with PMMA/SN/1.5 M LiClO 4 salt not only possesses good ionic conductivity but also have good diffusivity (D), mobility (μ) and Nµ values as compared to the other electrolyte specimens of this report. The thermogravimetric studies and electrochemical stability window measurement reveal that this optimized electrolyte also offers a relatively lower weight loss of &lt; 7 % on varying the temperature from room temperature to 100° C while the working voltage range offered by each PGEs is found to be &gt; 4 V. 

Electroanalytical studies on polymer gel electrolytes containing heat resistant polymethyl methacrylate, succinonitrile solvent and Lithium perchlorate salt

Solid polymer electrolyte (SPE) as a key battery component promises the advances in solid state lithium (Li) metal batteries (SSLMBs). Biomass with naturally designed structure, composition and physical/chemical properties exhibits...

D. Joice Sheeba

Papers

Study on the electrical properties of gum tragacanth - LiClO4 natural polymer electrolyte

Influence of plasticizer on conductivity and dielectric properties of guar gum-based sodium ion conducting polymer electrolyte

Polymer electrolyte based on guar gum and ammonium thiocyanate for proton battery application