Surface modification of nickel battery electrodes by cobalt plasma immersion ion implantation and deposition

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Nickel hydroxide is the electrochemically active material in the positive electrode of several important rechargeable alkaline-electrolyte batteries. It is believed that divalent Ni(OH){sub 2} is converted to trivalent NiOOH as the electrode is electrochemically oxidized during the battery charging process, and the reverse reaction (electrochemical reduction) occurs during battery discharge, however the details of this process are not completely understood. Because these electrochemical reactions involve surface charge-transfer processes, it is anticipated that surface modification may result in improved battery performance. We used broad-beam metal ion implantation and Metal Plasma Immersion Ion Implantation and Deposition to add cobalt and other species ... continued below

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17 p.

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Anders, S.; Anders, A.; Brown, I.; Kong, F. & McLarnon, F. February 1, 1995.

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Description

Nickel hydroxide is the electrochemically active material in the positive electrode of several important rechargeable alkaline-electrolyte batteries. It is believed that divalent Ni(OH){sub 2} is converted to trivalent NiOOH as the electrode is electrochemically oxidized during the battery charging process, and the reverse reaction (electrochemical reduction) occurs during battery discharge, however the details of this process are not completely understood. Because these electrochemical reactions involve surface charge-transfer processes, it is anticipated that surface modification may result in improved battery performance. We used broad-beam metal ion implantation and Metal Plasma Immersion Ion Implantation and Deposition to add cobalt and other species to the nickel electrode surface. The principle of the latter technique is explained in detail. It is shown that implanted and deposited cobalt ions act as a dopant of Ni(OH){sub 2}, and thereby alter its electronic conductivity. This electronic effect promotes lateral growth of NiOOH nodules and more-complete conversion of Ni(OH){sub 2} to NiOOH, which can be interpreted in terms of the nodule growth model. Other dopants such as Au, W, Pb, Ta and Ti{sub 4}O{sub 7} were also tested for suppressing the parasitic oxygen evolution reaction in rechargeable nickel cells.

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17 p.

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OSTI as DE96001111

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  • 2. international workshop in plasma-based ion implantation, Sydney (Australia), 12-15 Feb 1995

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  • Other: DE96001111
  • Report No.: LBL--36782
  • Report No.: CONF-9502122--1
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 110778
  • Archival Resource Key: ark:/67531/metadc623435

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Oct. 3, 2017, 6:40 p.m.

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Anders, S.; Anders, A.; Brown, I.; Kong, F. & McLarnon, F. Surface modification of nickel battery electrodes by cobalt plasma immersion ion implantation and deposition, article, February 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc623435/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.