Air secondary battery including cathode having trap portion
US9954262B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 25, 2015 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | May 6, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An air secondary battery has a cathode to which an oxygen-containing gas is supplied, an anode containing an active metal material, and an electrolyte interposed between the cathode and the anode. In a discharge process, metal ions are generated from the active metal material, transferred through the electrolyte, and then reacted and bonded with oxygen molecules in the oxygen-containing gas on the cathode. Thus, the oxygen is reduced to generate a metal oxide. The cathode has a trap portion for confining the metal oxide. For example, the cathode has a first cathode layer and a second cathode layer having different average pore diameters. The first cathode layer located adjacent to the electrolyte and having a smaller average pore diameter acts as the trap portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.