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Nanocomposite Hybrid Molecular Materials for Application in Solid-State Electrochemical Supercapacitors

Authors


  • This work was carried out within the framework of the “Xarxa Temàtica de Piles de Combustible de la Generalitat de Catalunya” and the “Red de Pilas de Combustible del CSIC” and was partially funded by MCyT (Spain) (MAT2002-04529-C03). We also acknowledge a Ramon y Cajal contract for MLC and thank the “Consejo Nacional de Ciencia y Tecnología de México (CONACYT)” for a pre-doctoral fellowship to AKCG.

Abstract

Molecular hybrid materials formed from polyoxometalates dispersed in conducting polymers represent an innovative concept in energy storage. This work reports in detail the first practical realization of electrodes based on these materials for energy storage in electrochemical supercapacitors. The molecular hybrids PAni/H4SiW12O40, PAni/H3PW12O40, and PAni/H3PMo12O40 (PAni: polyaniline) have been prepared electrochemically on platinum or carbon substrates, with PAni/H3PMo12O40 being the prototypical example presenting the best energy-storage performance in the series. This hybrid displays the combined activity of its organic and inorganic components to store and release charge in solid-state electrochemical capacitor cells, leading to a promising value of 120 F g–1 and good cyclability beyond 1000 cycles.

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