Graphene assisted heat dissipation battery

Abstract

The invention discloses a graphene assisted heat dissipation battery. The battery comprises a shell, a battery core and tabs, wherein the battery core is arranged in the shell, the battery core is connected with the tabs, the tabs extends out of a hole reserved in the shell and serve as a positive electrode and a negative electrode of the battery, the battery core consists of a positive pole piece, a negative pole piece, an ion permeable film and an insulating film, the battery core consists of an insulating film, a positive pole piece, a diaphragm and a negative pole piece and is manufacturedby the lamination or winding process, one side, back to the diaphragm, of the positive pole piece of the battery core is coated with a graphene film, a side, back to the diaphragm, of the negative pole piece is coated with a graphene film, thickness of the graphene film is 300-500 nm, and a heat conductivity coefficient of the graphene film is 4000-5000 Wm<-1>K<-1>. The preparation method of thegraphene film comprises steps of spraying graphene oxide solution onto the positive pole piece or the negative pole piece by adopting the electric atomization technology, and then reducing graphene oxide by using the laser in the nitrogen atmosphere; or spraying the graphene and ethyecellulose co-suspension onto the positive pole piece or the negative pole piece by adopting the electric atomization technology, and then heating to remove ethyecellulose. The graphene assisted heat dissipation battery has advantages of excellent heat dissipation effect and small volume occupation of a heat dissipation system.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a graphene-assisted heat dissipation battery. Background technique [0002] Since the beginning of the industrial revolution in the 18th century, the development of human civilization has strongly relied on fossil fuels. The exploitation and use of fossil energy has brought about a series of environmental problems: harmful gases such as SO2 and CO2 produced by the combustion of petroleum, coal and other fuels will cause ocean acidification and global warming, and the waste residue and smoke generated will also affect the environment. The land, water and air are polluted to a great extent. The photochemical smog incident in London in 1952 is a typical example. Today, with rising crude oil prices, increasingly severe environmental problems, and growing energy demand, in the face of many contradictions, the development of sustainable green energy has become the primary issue of our co...

AI Technical Summary

Problems solved by technology

There are also graphene directly filled around the cell, but graphene itself is a material with a high specific surface area, and it will be porous when used directly to fill it. The pores contain a large amount of air that does not flow through each other, which is not conducive to heat loss.

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