To make renewable energy technologies truly sustainable we must also incorporate efficient energy storage strategies. We will present methods and materials that can enhance the store and transport of electrical energy. Several of our metal coordination complexes bind strongly to SWCNTs. We have synthesized and characterized hybrid nanomaterials capable of enhancing the specific capacitance of thin film supercapacitors. These complexes act to enhance availble Electrical Double Layer Capacitance and add a significant psuedocapacitance increasing the specific capacitance, specific energy, and power. Componuds like [Ni(dibenzo[a,c]dipyrido[3,2-h:2',3'-j]phenazine)3]2+ use earth abundant metals. Structure determination of assembled SWCNT supraparticles by electron microscopy, and light scattering. Optical properties of the assemblies in solution will by UV-vis-NIR spectroscopic methods. Redox properties of surface adsorbed assemblies will be measured by electrochemical and spectroelectrochemical methods. The capacitance of thin film composites were determined using standard electrochemical methods including galvanostatic charge-discharge measurements. Equivalent circuit analysis of the composite electrodes were measured using electrochemical impedance spectroscopy. Experimental studies will be compared to computational modeling of these systems. Our objectives are to understand and control the morphology and directed assembly of SWCNTs upon adsorption of charged coordination complexes to form porous films for supercapacitor applications.

Electron transfer and molecular binding to nanostructured carbon for supercapacitor materials

249th National Meeting (2015)

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