Abstract
An electroless nickel process was used for the preparation of a thin-film current collector for concentric three-dimensional lithium and lithium-ion microbatteries. Ni–P coatings were deposited autocatalytically with the use of nickel sulfamate or nickel sulfate as a source of Ni2+ and sodium hypophosphite as a reducing agent. The synergistic effect of sodium acetate and citric acid was found to provide marked improvement in the pH stability of the sulfamate electrolyte. This enabled deposition of a conformal, fine-grained film on the high-aspect-ratio glass capillary and perforated-silicon substrates.
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Acknowledgments
We express our gratitude to RAMOT (University Authority for Applied Research and Industrial Development Ltd.) and to the European Community (“Superlion” project) for the partial support of this research.
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Ripenbein, T., Golodnitsky, D., Nathan, M. et al. Electroless nickel current collector for 3D-microbatteries. J Appl Electrochem 40, 435–444 (2010). https://doi.org/10.1007/s10800-009-0014-0
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DOI: https://doi.org/10.1007/s10800-009-0014-0