A New High-Temperature Lithium Para-Toluene Sulfonate (LIPTSA) Salt for Rechargeable Batteries

Abstract

Lithium para-toluene sulfonate [LIPTSA] was used for lithium rechargeable batteries, with poly(methyl methacrylate) [PMMA] as the base material. Tri block copolymer of PEO-PPO-PEO was used to increase the solubility of lithium salts in PMMA matrix. FTIR, TGA, XRD, impedance spectroscopy, and SEM were used for characterizations and morphological studies. LIPTSA salt is stable up to 375°C. The highest room temperature conductivity obtained was around 5 × 10⁻⁴ Scm⁻¹. The SEM picture shows clearly the heterogeneous morphology (salt-rich phases) distributed throughout the PMMA matrix. The XRD picture indicates the presence of crystalline, which increases with an increase in salt concentration.

Keywords:

• Impedance spectroscopy
• lithium para toluene sulfonate
• poly(methyl methacrylate)
• scanning electron microscopy

Acknowledgment

The authors are grateful to the Central Instrumentation Facility (CIF) at Birla Institute of Technology, Mesra, established in 2006 through the Technical Education Quality Improvement Programme (TEQIP) funded by the World Bank for the state-of-the-art instrumentation facility.