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Nano/micro-hybrid NiS cathodes for lithium ion batteries

Publication Type : Journal Article

Thematic Areas : Nanosciences and Molecular Medicine

Publisher : Ceramics International

Source : Ceramics International, Elsevier Ltd, Volume 40, Number 6, p.8351-8356 (2014)

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Keywords : Atomic emission spectroscopy, Cathodes, Chalcogenides, E. Batteries, E. Electrodes, E. Functional applications, Electric discharges, Electric properties, electrochemical analysis, Electrochemical performance, Electrolytes, Inductively coupled plasma, Inductively coupled plasma atomic emission spectroscopy, Lithium, Lithium batteries, Lithium compounds, Low- temperature process, Nickel, Redox reactions, Relative contribution, Surface morphology

Campus : Kochi

School : Center for Nanosciences

Center : Nanosciences

Department : Nanosciences and Molecular Medicine

Year : 2014

Abstract : pThe present study highlights a low temperature process by which 1D stacked 3D microstructures of nickel sulfide comprised of nanospikes have been synthesized and assembled as cathodes for lithium chalcogenide batteries. These micro/nano-clusters were synthesized hydrothermally under different conditions. These clusters exhibited a surface area of 15 m2 g-1. The present study also provides the first reports on the electrochemical performance of these NiS microclusters as cathode materials in lithium fluoro-Tris- sulfonimide electrolyte for lithium ion batteries. A detailed study has been performed to elucidate how surface morphology and redox reaction behaviors underlying these electrodes impact the cyclic behavior and specific capacity. This electrode-electrolyte combination showed minimal dissolution of the electrode in the electrolyte which was confirmed by inductively coupled plasma atomic emission spectroscopy. From the electrochemical analysis performed an intrinsic correlation between the capacity, self-discharge property and the surface morphology has been deduced and explained on the basis of relative contributions from the redox reactions of nickel sulfide in lithium fluoro-Tris-sulfonimide electrolyte. A working model of lithium battery in a coin cell form is also shown exhibiting a specific capacity of 550 mAh g -1. © 2014 Elsevier Ltd and Techna Group S.r.l./p

Cite this Research Publication : T. S. Sonia, Anjali, P., Roshny, S., Lakshmi, V., Ranjusha, R., Subramanian, K. R. V., Nair, S. V., and Balakrishnan, A., “Nano/micro-hybrid NiS cathodes for lithium ion batteries”, Ceramics International, vol. 40, pp. 8351-8356, 2014.

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