Substrate Integrated Nickel-Iron Ultrabattery with Extraordinarily Enhanced Performances

Sarkar, Debasish and Shukla, Ashok and Sarma, D D (2016) Substrate Integrated Nickel-Iron Ultrabattery with Extraordinarily Enhanced Performances. In: ACS ENERGY LETTERS, 1 (1). pp. 82-88.

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Abstract

A substrate-integrated nickel iron ultrabattery is realized using nickel oxide (NiO) nanoflakes and hematite (alpha-Fe2O3) nanorods as electroactive materials for its positive and negative electrodes, respectively. Direct growth of electroactive materials on a highly conductive stainless steel substrate enhances the mechanical stability of the system together with reducing its internal resistance. The proposed nanoarchitectural design of the electroactive materials provides a large number of interaction sites for the electrolytic ions with the electrode materials in conjunction with short ion-diffusion paths, which significantly improve the capacitive performance of individual electrodes and hence of the fabricated ultrabattery. As a consequence, the as-assembled ultrabattery exhibits a specific capacity value of similar to 36 mAh/g (94 F/g and volumetric capacitance similar to 0.77 F/cm(3)) at a current density of 0.5 A/g in a potential window between 0 and 1.4 V, with capacitance retention of similar to 60% of its original value even when the load current density is increased 20 times.

Item Type:	Journal Article
Publication:	ACS ENERGY LETTERS
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	20 Jan 2017 04:23
Last Modified:	20 Jan 2017 04:23
URI:	http://eprints.iisc.ac.in/id/eprint/55928

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