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South China University of Technology
| South China University of Technology Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20120107719 | ELECTRODE CATALYST FOR MEMBRANE ELECTRODE OF FUEL CELL AND ITS METHOD OF PREPARATION AND FUEL CELL MEMBRANE ELECTRODE - This invention discloses an electrocatalyst for membrane electrode assembly, and its preparation method, as well as a fuel cell membrane electrode assembly. An electrocatalyst for fuel cell application, it is featured that the electrocatalyst is prepared by supporting precious metal (10-60 wt %) on a composite carrier which is prepared by depositing water-containing substance (0.3-10 wt %) on carbon material; Using the catalyst invented by this invention as anode catalyst, an fuel cell membrane electrode assembly with excellent non-humidification performance can be prepared by normal procedures. No need to construct a water retention layer, no need to add water retention material in proton exchange membrane, it avoids the possible problems caused by adding water attention material into proton exchange membrane or inserting a water retention layer. The approach suggested by this invention is a simple and effective approach to realize non-humidification membrane electrode assembly. | 05-03-2012 |
| 20110058668 | Secure group key management approach based upon N-dimensional hypersphere - This invention publishes a secure group key management approach based upon N-dimensional hypersphere. After initialization, the GC admits the new members and assigns identifiers to them when there are new members joining the group, and deletes the leaving members' private information when there are members leaving the group. If a lot of members join and other members leave the group at the same time, the GC deletes the leaving members' private information, admits the new members, assigns indemnifiers to the new members, and then chooses mapping parameters, mapping each member's and its private information to the points in a multi-dimensional space. The GC calculates the central point of the hypersphere, and publishes the central point, the mapping parameter and the identifiers of leaving members if there are members leave. The group members calculate the mapping points, and then calculate the group keys. The invention can effectively reduce user storage, user computation, and amount of update information while re-keying. The independence of the group keys can be kept. | 03-10-2011 |