FUNCTIONAL GROUP AND IONIC CONDUCTIVITY OF CARBOXYMETHYL CELLULOSE (CMC)/LITHIUM TRIFLATE (LiCF3SO3) POLYMER MEMBRANE DISPERSED WITH RICE HUSK ASH SILICA AS SOLID ELECTROLYTE IN SECONDARY BATTERY

Abstract

One of the components of the battery is an electrolyte that acts as an ion transfer medium. The solid electrolyte is currently being developed as a membrane because of its higher level of safety. The solution casting method modifies the solid electrolyte by adding rice husk ash silica to the CMC/LiCF₃SO₃ membrane. The rice husk ash silica concentration was 0% and 12% w/w. The characterization carried out in this study was Fourier-Transform Infrared (FTIR) and Electrochemical Impedance Spectroscopy (EIS). The results of FTIR showed the presence of functional groups of CMC formed on each polymer membrane, namely O-H, and COO^- stretching at wave numbers 3380-3396 cm^-1 and 1593-1595 cm^-1. Adding rice husk ash silica to the polymer membrane causes the formation of Si-O-Si functional groups at wave numbers 641 cm^-1 and 1028 cm^-1. The EIS result of CMC, CMC/LiCF₃SO₃, and CMC/LiCF₃SO₃/Silica produced ionic conductivity of 1.262 × 10^-7, 6.792 × 10^-7, and 2.684 × 10-6 S/cm, respectively. This study concluded that rice husk ash silica is evenly dispersed in the CMC/LiCF₃SO₃ solid electrolyte polymer membrane to be used as a solid electrolyte for the secondary battery.