Новые материалы топливных силовых элементов -литий-ионные аккумуляторы

Recently, the research team of the State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences developed a kind of sp hybrid nitrogen doped graphyne. It was reported that compared with other forms of nitrogen configurations, the introduction of sp hybrid nitrogen atoms makes the surrounding carbon atoms have more positive charges, which is more conducive to the adsorption and activation of oxygen, makes it easier for electrons to transfer to the catalyst surface, and can significantly improve the ORR catalytic performance, It is expected to replace platinum catalysts in the application of fuel cells.(Lithium - Ion Battery Equipment)

Nitrogen doping configurations have many different forms, including pyridine nitrogen, imine nitrogen, pyrrole nitrogen, amino nitrogen, nitrile nitrogen, graphite nitrogen and nitrogen oxide.

The experimental results show that under alkaline conditions, the half wave potential of the material is 0.87 V, and the dynamic current density is 38 mA per cubic centimeter. This data is superior to the commercial platinum carbon catalyst, and it shows better stability and methanol tolerance. Under acidic conditions, the activity of this material is slightly lower than that of commercial platinum carbon catalyst, but still superior to other non-metallic catalysts.