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Correlation of structural disorder with the reversible discharge capacity of nickel hydroxide electrode

Ramesh, TN and Kamath, PV and Shivakumara, C (2005) Correlation of structural disorder with the reversible discharge capacity of nickel hydroxide electrode. In: Journal of the Electrochemical Society, 152 (4). A806-A810.

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Abstract

Hydrothermal treatment of a slurry of badly crystalline (beta(bc)) nickel hydroxide at different temperatures (65-170 degrees C) results in the progressive ordering of the structure by the step-wise elimination of disorders. Interstratification is eliminated at 140 degrees C, while cation vacancies are eliminated at 170 degrees C. A small percentage of stacking faults continue to persist even in `crystalline' samples. Electrochemical investigations show that the crystalline nickel hydroxide has a very low (0.4 e/Ni) reversible charge storage capacity. An incidence of at least 15% stacking faults combined with cation vacancies is essential for nickel hydroxide to perform close to its theoretical (1 e/ Ni) discharge capacity. (c) 2005 The Electrochemical Society.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The Electrochemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 02 Jun 2010 05:07
Last Modified: 19 Sep 2010 06:06
URI: http://eprints.iisc.ernet.in/id/eprint/27767

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