Incorporation of NH_4Br in Tamarind Seed Polysaccharide biopolymer and its potential use in electrochemical energy storage devices

摘要

Novel proton conducting biopolymer Tamarind Seed Polysaccharide complexed with different concentrations of ammonium bromide have been prepared and characterized. The increase in amorphous nature of the sample has been confirmed by structural analysis. The complex formation between biopolymer and salt has been confirmed by vibrational analysis. The glass transition temperature values of the biopolymer membranes have been found by Differential Scanning Calorimetry analysis. The maximum ionic conductivity 1.58 × 10~(−3) S cm~(−1) is observed for 1 g TSP: 0.4 g NH_4Br by impedance analysis. The conducting ions in the polymer network have been confirmed by transference number measurement. A simple battery has been fabricated with good stability of 1.54 V as open circuit voltage. The red light emitting diode has been activated by the battery constructed with the highest ionic conductivity membrane.