Microfabricated nickel-based electrodes for high-power battery applications

High-surface area, three-dimensional (3D) microstructures are designed and fabricated by the sequential electroplating of sacrificial and structural layers in a photoresist mold. A conformal coating of electrochemically deposited nickel hydroxide (Ni(OH)2) films on these MEMS-enabled multilayer stru...

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Bibliographic Details
Published in:Journal of micromechanics and microengineering 2013-11, Vol.23 (11), p.114008-7
Main Authors: Armutlulu, A, Bidstrup Allen, S A, Allen, M G
Format: Article
Language:English
Subjects:
Applied sciences
Charge
Devices
Electrodes
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Hydroxides
Micromechanics
Nickel
Photoresists
Three dimensional
Transport and storage of energy
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Summary:High-surface area, three-dimensional (3D) microstructures are designed and fabricated by the sequential electroplating of sacrificial and structural layers in a photoresist mold. A conformal coating of electrochemically deposited nickel hydroxide (Ni(OH)2) films on these MEMS-enabled multilayer structures enabled the formation of functional electrodes for electrochemical energy storage devices. The characterization of the electrodes is performed galvanostatically at various charge and discharge rates. Electrodes with a varying number of laminations are shown to yield areal capacities from 0.1 to 5.2 mAh cm-2. Power characteristics of the electrodes are determined by applying ultra-high charge rates of up to 120 C. At this high charge rate, the electrode is able to deliver 90% of its capacity.
ISSN:0960-1317
1361-6439
DOI:10.1088/0960-1317/23/11/114008