Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996

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Inert gas atomization using metal hydride alloys for a Ni/MH{sub x}cell was studied. Atomization of the alloys was demonstrated on a small production scale up to batch size of several kg. Relative performance of the atomized and nonatomized alloys was investigated for the electrode material in a Ni/MH{sub x} cell. The study included effects of charge-discharge rates, temperature, and particle size on cell voltage (polarization) and specific capacity. Results show that the specific capacity of the present atomized alloys was apprecialy smaller than that of the nonatomized powder, especially for initial cycles. Full activation of the atomized alloys oftentook several ... continued below

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57 p.

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Lim, Hong S. March 1, 1996.

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Description

Inert gas atomization using metal hydride alloys for a Ni/MH{sub x}cell was studied. Atomization of the alloys was demonstrated on a small production scale up to batch size of several kg. Relative performance of the atomized and nonatomized alloys was investigated for the electrode material in a Ni/MH{sub x} cell. The study included effects of charge-discharge rates, temperature, and particle size on cell voltage (polarization) and specific capacity. Results show that the specific capacity of the present atomized alloys was apprecialy smaller than that of the nonatomized powder, especially for initial cycles. Full activation of the atomized alloys oftentook several hundreds of cycles. However, no appreciable difference in discharge rate capability was observed with R10 and R12 alloys. Chemical compositions were indistinguishable, although the oxygen contents of the atomized alloys were always higher. Effects of Ni and Cu coating on alloy performance were studied after electroless coating; the coatings noticeably improved the electrode rate capability for all the alloys. The electrode polarization was esecially improved, but not the cycle life. Further studies are needed.

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57 p.

Notes

OSTI as DE96010016

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  • Other Information: PBD: Mar 1996

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  • Other: DE96010016
  • Report No.: DOE/ER/14380--T1
  • Grant Number: FG03-93ER14380
  • DOI: 10.2172/219168 | External Link
  • Office of Scientific & Technical Information Report Number: 219168
  • Archival Resource Key: ark:/67531/metadc665213

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  • March 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 3:25 p.m.

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Lim, Hong S. Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996, report, March 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc665213/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.