Powdery material, electrode member, method for manufacturing same and secondary cell

• Main Author: SOICHIRO KAWAKAMI
• Format: Patent
• Language: English
• Published: 28.10.1998
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; CASTING; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING; WORKING METALLIC POWDER

There are disclosed a powdery material comprising a hydrogen-storing compound comprising a core layer of a hydrogen-storing alloy coated with a transition metal oxide layer and having a transition metal dispersed and carried on the outermost surface thereof, an electrode member for alkali secondary cells using the powdery material comprising a hydrogen-storing compound, and a secondary cell using the electrode member as an electrode. In particular, the invention provides a powdery material comprising nickel hydroxide coated either with a compound higher in conductivity than nickel hydroxide comprising at least one element selected from cobalt element and nickel element and oxygen element, containing 0.5 atomic % to 10 atomic % of at least one element selected from lithium, potassium, manganese aluminum, zinc, magnesium, molybdenum, tungsten vanadium and titanium, or with a compound higher in conductivity than nickel hydroxide comprising at least one transition metal element selected from molybdenum, tungsten, vanadium and titanium and oxygen and hydrogen elements. With such an alkali secondary cell, a strong resistance to overcharge, a high charging and discharging efficiency and a long cycle life can be implemented.