Dendrimers as a relatively new class of macromolecule have been attracting great attention. Their highly branched, monodisperse structure and globular, void-containing shapes make them an interested and important precursor building blocks in synthesis. Tomolia et al reported the first densritic electrolytes, the carboxylate-terminated PAMAM dendrimers with group I metals, but the ionic conductivity was not disclosed. Recent years, attention paid on single-ion conductors has turned to new classes of solvent-free polyelectrolytes, such as polyphosphazene sulfonate systems and comb-like polysilxane electrolyte which exhibit better conductivity at room temperature than linear-chain PEO electrolytes. The highest value reported for a polyelectrolyte "homopolymer" without any additives is 1.1x1-~(-7) scm~(-1) at 30 degree~8.
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