Synthesis and understanding of nanomaterials with improved properties are critical in the development of high capacity electrochemical cells for application in lithium ion batteries. Nanostructured materials have been shown to have exceptional storage capabilities. In this project, we have prepared nanostructured columnar self-assembled ruthenium oxide (RuO2) directly on stainless steel current collectors using low pressure chemical vapor deposition. The as-prepared materials were examined by powder X-ray diffraction. 3D pyramidal structure ranging from 50 to 80 nm was self-assembled. Galvanostatic charge-discharge experiments versus Li/Li+ in the range of 4 to 0.1 V have demonstrated that these nanostructures are reversible at extremely high capacity (~1150 mAh g-1, 5.70Li per mol of RuO2). The capacity retention was approximately 100% from the first to second cycle and 87% after 60 cycles. The origin of the excess capacity was probed using cyclic voltammetry (CV), which was performed at various different voltage ranges. The CV results will be discussed.

Cyclic voltammetry study on the origin of excess capacity on ruthenium oxide

249th National Meeting (2015)

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