ACTIVE MATERIAL OF HYDROGEN STORAGE ALLOY ELECTRODE

• Main Authors: CHEN, YOUXIAO, WANG, GENSHI, YUAN, HUATANG, JIN, YUFENG, ZHOU, ZUOXIANG, CAO, XUEJUN, SONG, DEYING, CHEN, JUN, ZHANG, YUNSHI
• Format: Patent
• Language: English; French
• Published: 17.01.1994
• Edition: 5
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PLASMA TECHNIQUE; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

This invention relates to a novel active material of hydrogen storage alloy electrode with the composition of formula MmNi5-x-y-zZnxQyRz, in which Q=Al, Ca and Sr, R=Li, Na and K, O<x<1, O<y<0.8 and O<z<1. In the said alloy powder, an alloy phase of zinc is formed between the surface coating and the alloy base after treatment of the alloy powder by surface plating. As a result, the electrochemical capacity as well as the life of the hydrogen storagealloy electrode formed is increased significantly while the cost is greatly reduced with the substitution of Zn for Co.