Characterization of Plasticized CMC-NH4BR Based Biopolymer Electrolyte and Electrochemical Studies on the Solid-State Batteries

摘要

Much research has been devoted to the preparation of solid polymer electrolytes made of various materials. Some of the wellknownudare synthetic polymer materials (petroleum resources) but these polymers are high in cost and the depletion of petroleumudresources coupled with increasing environmental regulation. For these reasons, a lot of effort has been made to develop theudelectrolytes using natural biopolymer materials. The increasing interest in green energy storage materials for electrochemicaluddevices with the development of polymer as electrolytes candidate has attracted great attention recently. It can offer a numberudof high-value opportunities, provided that lower costs can be obtained besides environmental friendly. Due to this matter, theuddevelopment of plasticized biodegradable polymer electrolytes (BPEs) has been accomplished in this work by incorporatingudvarious composition of EC with carboxy methylcellulose doped NH4Br via solution casting method. The plasticized polymer–udsalt complex formation and ionic conduction of BPEs have been analyzed through infrared spectroscopy and impedanceudmeasurement. Plasticization using EC in BPEs system helps the enhancement of NH4Br dissociation and therefore increases theudprotonation process in the system. The highest ionic conductivity obtained for CMC−NH4Br containing with 25 wt. % NH4Brudwas achieved at 1.12 x 10-4udS cm-1udand enhanced to 3.31 x 10-3udS cm-1 with addition of EC. The conductivity-temperature forudBPEs system obeys the Arrhenius relation where the ionic conductivity increases with temperature. The electrochemical celludwere fabricated with the configuration of Zn + ZnSO4.7H2O | BPEs system | MnO2 for the highest conductivity and produced audmaximum open circuit voltage of 1.48 V at ambient temperature and showed good rechargeability.