Electrochemical performance of laser micro-structured nickel oxyhydroxide cathodes



Neale, AR ORCID: 0000-0001-7675-5432, Jin, Y, Ouyang, J, Hughes, S, Hesp, D, Dhanak, V, Dearden, G ORCID: 0000-0003-0648-7473, Edwardson, SP ORCID: 0000-0001-5239-4409 and Hardwick, LJ ORCID: 0000-0001-8796-685X
(2014) Electrochemical performance of laser micro-structured nickel oxyhydroxide cathodes. Journal of Power Sources, 271. 42 - 47.

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Abstract

This study describes the preparation and analysis of laser micro-structured nickel metal electrodes for application as a cathode material in micro-batteries based on the nickel oxyhydroxide chemistry. Using ultra-short pulse length lasers (picoseconds to femtoseconds); surface micro-structures in the form of ripples are rapidly generated at the surface of nickel metal cathodes. These ripple micro-structures, with a periodic spacing approximately equal to the wavelength of laser radiation used, are more commonly referred to as laser-induced periodic plasmonic structures (LIPPS). The electrochemical activity of the LIPPS nickel metal cathodes is investigated in aqueous KOH using cyclic voltammetry. Across a wide range of scan rates, the results of the voltammetry show that the formation of LIPPS yields a considerable enhancement in the electrochemical activity of the nickel surface. The observed enhancement is attributed to both the greater surface area of the rippled surface relative to a planar nickel surface and a thicker NiOx layer generated by the laser process.

Item Type: Article
Additional Information: Highlights: - The surface of Ni foils was processed by ultra-short pulse length, low energy laser light. - The technique produced periodic ripple micro-structures (LIPPS) at the surface of the Ni. - LIPPS yields an increased electrochemical activity relative to unprocessed planar Ni by a factor of 2.5. - LIPPS electrode modification could be relevant for Ni based micro-battery systems.## TULIP Type: Articles/Papers (Journal) ##
Uncontrolled Keywords: Nickel oxyhydroxide cathodes, Laser-induced periodic plasmonic structures, Micro-batteries, Nickel oxide
Depositing User: Symplectic Admin
Date Deposited: 21 Feb 2017 07:51
Last Modified: 02 Oct 2021 19:11
DOI: 10.1016/j.jpowsour.2014.07.167
Open Access URL: http://www.sciencedirect.com/science/article/pii/S...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3005919