storage of electrical energy in an oxidation - reduction polymer material is optimized when the material is lignin and / or hydrazine is added to the material so as to facilitate bonding of the material to graphite . a preferred embodiment of the invention includes a storage device having an electron acceptor component separated from an electron donor component by a barrier which is impregnated with an electrolyte so as to electrically separate the two components while serving as an ion conduit . at least one of the layers includes an oxidation - reduction polymer material which either is lignin or is mixed with hydrazine , or both . the preferred energy storage material is a mixture of lignin , hydrazine and graphite , the latter being either added to the mixture or formed by graphitization upon heating of the lignin .