Publication Type:

Journal Article


Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, Volume 470, p.280-289 (2015)



alpha cobalt hydroxide, article, atomic emission spectrometry, Atomic emission spectroscopy, Capacitance, Capacitors, Cobalt, Cobalt compounds, cobalt derivative, Cobalt hydroxides, Dissolution, Electric discharges, electrochemical analysis, electrode, Electrodes, electrolyte, Electrolytes, Electrolytic capacitors, Emission spectroscopy, energy, High rate capability, hybrid, Hydrothermal synthesis, Inductively coupled plasma, Inductively coupled plasma atomic emission spectroscopy, Lithium, lithium hydroxide, low temperature, Low temperature hydrothermal routes, Microporous materials, Morphology, nanomaterial, oxidation reduction reaction, Plasma stability, potassium hydroxide, priority journal, Redox reactions, sodium hydroxide, Super capacitor, Supercapacitor application, Supercapacitor electrodes, Surface morphology, surface property, synthesis, temperature, unclassified drug


The present study demonstrates a low temperature hydrothermal route for the synthesis of α-cobalt hydroxide comprising of randomly arrayed nano strands in a three dimensional plane. These micro/nano hybrid structures were used as building blocks for processing high surface area supercapacitor electrodes. Surface area of these structures was measured to be  100m2g-1. The influence of surface morphology in three different electrolytes namely lithium hydroxide, sodium hydroxide and potassium hydroxide was analyzed. The influence of surface morphology on capacitance and internal resistance was also determined and explained on the basis of redox reactions in these electrolytes. Capacitance values as high as 1024Fg-1 was attained for these structures when employed as thin film electrodes with life extending to more than 5000 cycles. Inductively coupled plasma-atomic emission spectroscopy was used to determine the electrode dissolution in the given electrolyte and the observations were co-related with the cycling stability. Low self-discharge, high rate capability along with low cost makes them promising systems for supercapacitor applications. © 2015 Elsevier B.V.


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Cite this Research Publication

A. S. Pillai, Rajagopalan, R., Joseph, J., Amruthalakshmi, A., Ajay, A., Shakir, I., Shantikumar V Nair, and Balakrishnan, A., “Mesoscopic Architectures of Co(OH)2 Spheres with an Extended Array of Microporous Threads as Pseudocapacitor Electrode Materials”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 470, pp. 280-289, 2015.