Bipolar plate for fuel cell having controlled structure of carbon materials and method of manufacturing the same
US10693151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Dec 22, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a bipolar plate for a fuel cell having a controlled structure of carbon materials and a method of manufacturing the same, the method including obtaining a masterbatch by mixing a first carbon material powder having a size ranging from 0.1 to 200 μm with a polymer resin, forming a masterbatch powder by crushing the masterbatch, preparing a conductive composition by mixing the masterbatch powder with a second carbon material powder having a size ranging from 300 μm to 1 mm, and manufacturing a bipolar plate by subjecting the conductive composition to compression molding. Thereby, carbon materials in a powder phase having different sizes can be uniformly dispersed via a masterbatch to thus shorten a conductive path, thereby decreasing electrical resistivity, and furthermore, dispersion in the polymer resin can be improved, thereby increasing flexural strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.