Titles:
POSITIVE ELECTRODE CATALYST FOR METAL-AIR BATTERY, POSITIVE ELECTRODE FOR METAL-AIR BATTERY, AND METAL-AIR BATTERY
金属空気電池用正極触媒、金属空気電池用正極及び金属空気電池
Abstracts:
The present invention provides a positive electrode catalyst for a metal-air battery, said positive electrode catalyst comprising a melilite-type complex oxide that is represented by formula (1): (BawSr1-w)2Fe2-2x(CoyNi1-y)x(SizGe1-z)1+xO7 (1) (w, x, y and z are such that 0 ≤ w ≤ 1, 0 < x < 1, 0 < y < 1, and 0 ≤ z ≤ 1.
Titles:
Air secondary battery catalyst and air secondary battery
空気二次電池用触媒及び空気二次電池
Abstracts:
Kind Code: A1 A catalyst for an air secondary battery and an air secondary battery including the catalyst for an air secondary battery are provided, which can suppress the occurrence of micro short circuits more than before and thereby improve the cycle life characteristics. offer. A battery (2) includes an electrode group (10) including an air electrode (16) and a negative electrode (12) superimposed with a separator (14) interposed therebetween, and a container (4) containing the electrode group (10) together with an alkaline electrolyte (82). The electrode 16 contains an air secondary battery catalyst, and this air secondary battery catalyst has a pyrochlore-type crystal structure represented by the composition formula Bi2Ru2O7, and the lattice constant in this crystal structure is , 10.13 Å or more and 10.24 Å or less of the bismuth ruthenium composite oxide. [Selection drawing] Fig. 1
A metal-air battery includes a metal negative electrode, an air electrode, and a spacer interposed between the metal negative electrode and the air electrode 5. The spacer is composed of grip-shaped frameworks extended in a three-dimensional direction, and an electrolytic solution for filling a space between the frameworks.
