Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Consolidation of powders
Patent
1998-04-14
2000-07-11
Jenkins, Daniel J.
Powder metallurgy processes
Forming articles by uniting randomly associated metal particles
Consolidation of powders
419 61, B22F 302
Patent
active
060868201
ABSTRACT:
A method for producing an electrode of Ni/metal hydride alloy secondary cells. The electrode may be produced by mixing an active material with approximately 10-50 wt % of Cu powders, which can serve as a binder as well as a current collector, and cold-pressing the mixture at a pressure of 10 ton/cm. As the Cu-compacted electrode continues to experience the cycle of charge and discharge, the desolution-deposition of Cu is gradually produced. This desolution-deposition of Cu allows Cu to be deposited on the surface of the electrode comprising the hydrogen storage alloy, so that the electrode can be similar to a conventional Cu-electroless plated electrode in surface morphology. Consequently, the method of the invention can be an alternative for conventional electroless plating, which significantly improves the general functions of hydrogen storage alloy electrode, including low temperature dischargeability and high rate capability, without producing pollution of the environment.
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H. Sawa et al., "Electrochemical Properties of Zr-V-Ni System Hydrogen-Absorbing Alloys of Face-Centered Cubic Structure", Materials Transactions, JIM, vol. 31, No. 6 (1990), pp. 487-492.
Jang Kuk Jin
Jung Jae Han
Kim Dong Myung
Lee Ho
Lee Jai Young
Jenkins Daniel J.
Korea Advanced Institute of Science & Technology
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