Graphene Super battery developed successfully

Scientists at the Shanghai Institute of Silicate of the Chinese Academy of Sciences have successfully developed a high-performance super capacitor 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 continue for 35 kilometers. The relevant research results were published in the journal Science on the 18th.

Super capacitors are an electrochemical energy storage device between conventional capacitors and batteries, Xinhua reported December 20. Due to its high power density, long cycle life, safety and reliability, it has been widely used in many fields such as hybrid electric vehicles and high-power output equipment. However, the super capacitor is not "perfect" and its core problem is that the energy density is low. How to make super capacitors both high power and high energy, scientists have not found ideal materials for a long time.

Huangfuqiang said that compared with traditional electrode materials, graphene has four outstanding advantages: First, the high specific surface area is conducive to high energy density; Second, ultra-high conductivity is conducive to maintaining high power density; Thirdly, the rich chemical structure is conducive to the introduction of pseudo capacitance and the improvement of energy density; Fourth, the special electronic structure is conducive to optimizing the relationship between structure and performance.

Through repeated experiments, design, and synthesis, Huangfuqiang's team found that nitrogen-doped ordered mesoporous graphene performed best. Not only can it achieve high energy density and high power density, but it can also use water-based electrolytes to achieve non-toxic, environmentally friendly, cheap, safe and reliable.

According to the introduction, the new type of graphene Super capacitor is light in volume, non-flammable and explosive, and can be prepared at low cost to achieve scale production. Because the performance has obvious competitive advantages over lead-acid, nickel-metal hydride and other batteries, and is superior to lithium batteries in terms of rapid charging and placing, the "super battery" can be applied to the replacement of existing hybrid electric vehicles and high-power output equipment. A shares of listed companies such as China Baoan, Fangda Carbon, and enocarbon, involving graphene related businesses.

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