ALKALINE STORAGE BATTERY AND ALKALINE STORAGE BATTERY SYSTEM INCLUDING THE SAME

• Main Authors: AKAHO ATSUTOSHI, MATSUI YU, MAGARI YOSHIFUMI, NAGAE TERUHITO
• Format: Patent
• Language: English
• Published: 08.07.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide: an alkaline storage battery improved in initial output characteristics, capable of suppressing deterioration in output characteristics after endurance use, and excellent in continuous charge characteristics; and an alkaline storage battery system including the alkaline storage battery.SOLUTION: An alkaline storage battery includes an electrode group together with an alkaline electrolyte in an outer packaging can, the electrode group including: a nickel positive electrode including nickel hydroxide as a main positive electrode active material; a hydrogen absorbing alloy negative electrode including a hydrogen absorbing alloy as a main negative electrode active material; and a separator separating the nickel positive electrode and the hydrogen absorbing alloy negative electrode. The hydrogen absorbing alloy is represented by general formula: LnMgNiAlM(in the formula, Ln represents at least one element selected from Y or the like, M represents at least one element selected from V or the like, and 0.05≤x≤0.30, 0.05≤a≤0.30, 0≤b≤0.50 and 2.8≤y≤3.9 are satisfied), and tungsten (W) is solid-solved in the nickel positive electrode.