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

Abstract

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.

Authors:
Publication Date:
Research Org.:
Hughes Space and Communications Co., Torrance, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
219168
Report Number(s):
DOE/ER/14380-T1
ON: DE96010016
DOE Contract Number:  
FG03-93ER14380
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; NICKEL-HYDROGEN BATTERIES; ELECTRODES; PERFORMANCE; PROGRESS REPORT

Citation Formats

Lim, Hong S. Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996. United States: N. p., 1996. Web. doi:10.2172/219168.
Lim, Hong S. Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996. United States. doi:10.2172/219168.
Lim, Hong S. Fri . "Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996". United States. doi:10.2172/219168. https://www.osti.gov/servlets/purl/219168.
@article{osti_219168,
title = {Advanced nickel-metal hydride cell development. Final report, September 1993--March 1996},
author = {Lim, Hong S.},
abstractNote = {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.},
doi = {10.2172/219168},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {3}
}