A group of scientists with the Shanghai Institute of Ceramics under the Chinese Academy of Sciences have developed a new powerful electrode material, nitrogen-doped ordered mesoporous graphene.
The new material can be used to produce high-performance super capacitors, which may become power supply of hybrid electric cars and support the cars to travel 35 km with seven seconds of charging. Super capacitors that are made of the new materials are small in size, non-flammable and non-plosive.
They can be mass produced at low costs. According to the latest issue of Science Magazine, carbon-based super capacitors can provide high electrical power but do not have sufficient energy density to directly compete with batteries.
The Chinese scientists found that a nitrogen-doped ordered mesoporous few-layer carbon can be bipolarly charged or discharged at a fast, carbon-like speed in aqueous electrolytes. These bipolar aqueous-electrolyte electrochemical cells offer power densities and lifetimes similar to those of carbon-based super capacitors and can store a specific energy of 41 watt-hours per kilogram.
The scientific achievement is expected to spur share prices of Chinese listed grapheme companies.
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