Polymer electrolytes based on natural polymers

A. Pawlicka and J.P. Donoso,     Universidade de São Paulo, Brazil


The development of new materials that can be applied as solid electrolytes has led to the creation of modern systems of energy generation and storage. Among different poly(ethylene oxide)-based electrolytes, natural polymers, such as hydroxyethylcellulose, hydroxypropylcellulose or carboxymethylcellulose, starch and chitosan or proteins like gelatin, are also proposed. After salt or acid addition, the transparent membranes show ionic conductivity values of 10− 3 S/cm and can be applied with good stability results to electrochromic devices. The present review shows the principal results of ionic conductivity characterization ...

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