Carbon nanosphere with at least one opening, method for preparing the same, carbon nanosphere-impregnated catalyst using the carbon nanosphere, and fuel cell using the catalyst
US7837968B2 · kind B2 · utility
26Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2005 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jun 22, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/888
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A carbon nanosphere has at least one opening. The carbon nanosphere is obtained by preparing a carbon nanosphere and treating it with an acid to form the opening. The carbon nanosphere with at least one opening has higher utilization of a surface area and electrical conductivity and lower mass transfer resistance than a conventional carbon nanotube, thus allowing for higher current density and cell voltage with a smaller amount of metal catalyst per unit area of a fuel cell electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.