Application of graphdiyne in metal ion batteries and super-capacitors

Abstract

The invention belongs to the field of metal ion batteries and super-capacitors, and particularly relates to an application of materials of graphdiyne which is an allotrope of carbon in electrode materials of the metal ion batteries and the super-capacitors. Thin-film materials of the graphdiyne which is the allotrope of the carbon are used as negative electrode materials of the metal ion batteries or the super-capacitors. A large-area graphdiyne thin film is formed on the surface of a copper sheet to be used as the negative electrode materials of the metal ion batteries and the super-capacitors, and therefore the metal ion batteries and the super-capacitors obtain excellent electrochemical performance which comprises higher specific capacity, outstanding rate performance and ultralong cycle life. Research results show that graphdiyne is a negative electrode material, with high potential, of lithium ion batteries, and can be used as negative electrode materials of batteries of other metal ions (such as sodium and potassium).

Description

technical field [0001] The invention belongs to the field of metal ion batteries and supercapacitors, and in particular relates to the application of a carbon allotrope graphyne material in electrode materials of metal ion batteries and supercapacitors. Background technique [0002] In recent years, lithium-ion batteries have been widely used in various portable electronic devices and mobile communication fields. With the growth of people's demand for electric vehicles and hybrid vehicles, there is an urgent need to develop some new lithium-ion batteries with high specific capacity, excellent rate performance and long cycle life to meet people's growing needs, and also proposed electrode materials. Higher requirements, especially for negative electrode materials. [0003] At present, in commercial lithium-ion batteries, cheap graphite is mostly used as negative electrode material, but the low theoretical capacity (372mAh / g) of graphite limits its application in power lithiu...

AI Technical Summary

Problems solved by technology

[0003] At present, in commercial lithium-ion batteries, cheap graphite is mostly used as negative electrode material, but the low theoretical capacity (372mAh / g) of graphite limits its application in power lithium-ion batteries (Tarascon, J.M.; Armand, M., Nature 2001, 414(6861), 359-367. Manev, V.; Naidenov, I.; Puresheva, B.; Zlatilova, P.; Pistoia, G., J. Power Sources 1995, 55(2), 211-215. )

Images