Abstract The Shanghai Institute of Ceramics of the Chinese Academy of Sciences has successfully developed a high-performance supercapacitor electrode material, nitrogen-doped ordered mesoporous graphene. The material has excellent electrochemical energy storage characteristics and can be used as an "super...Scientists from the Shanghai Institute of Ceramics of the Chinese Academy of Sciences have successfully developed a high-performance supercapacitor electrode material, nitrogen-doped ordered mesoporous graphene. The material has excellent electrochemical energy storage characteristics and can be used as a "super battery" for electric vehicles: it takes only 7 seconds to charge and can last for 35 kilometers. Relevant research results were published in the journal Science on the 18th.
December 20th news, supercapacitors, is an electrochemical energy storage device between the traditional capacitor and the battery. Due to its high power density, long cycle life, safety and reliability, it has been widely used in hybrid electric vehicles, high-power output equipment and other fields. However, supercapacitors are not "perfect" and their core problem is low energy density. How to make supercapacitors combine high power and high energy. Scientists have not found ideal materials for a long time.
Huang Fuqiang introduced that compared with traditional electrode materials, graphene has four prominent advantages: first, high specific surface area is conducive to high energy density; second, ultra high conductivity is conducive to maintaining high power density; third, chemistry The rich structure is conducive to the introduction of tantalum capacitors to improve energy density; fourth, the special electronic structure is beneficial to optimize the relationship between structure and performance.
Through trial and error, design and synthesis, Huang Fuqiang team found that the performance of nitrogen-doped ordered mesoporous graphene was the best. Not only can achieve high energy density, high power density, but also through the use of water-based electrolyte, non-toxic, environmentally friendly, low-cost, safe and reliable.
According to reports, the new graphene supercapacitor is light in weight, non-flammable and non-explosive, and can be produced at a low cost to achieve scale production. Because the performance has obvious competitive advantages compared with lead-acid, nickel-metal hydride and other batteries, and is superior to lithium battery in fast charge and discharge, the "super battery" can be applied to the replacement of existing hybrid electric vehicles and high-power output devices.
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