High ionic conducting polymer with polysaccharide and its applications

Polysaccharide polymers such as cyanoethylpullulan, cyanoethylcellulose, and acetylcellulose were examined for use as matrix polymers in gel-electrolytes (ionic conducting polymers). Using cyanoethylpullulan matrix polymer, an excellent gel-electrolyte which provided a high ionic conductivity of up to 2.4 x 10(-3) S/cm at ambient temperature and good mechanical strength was obtained. In one of our applications of the newly developed gel-electrolyte, we used it to fabricate rechargeable lithium ion polymer batteries. These batteries showed good electrochemical properties, for example, a high charge/discharge efficiency and high discharge current density.