What Are The Advantages And Disadvantages Of Graphite Heat Dissipation?

Which is better? Graphene heat dissipation or liquid cooling?

Comparing graphene heat dissipation with liquid cooling, graphene heat dissipation is better.

Liquid cooling is the heat directly transferred to the SOC, and graphite sheet is attached to the back cover to assist in heat dissipation. Graphene sheet is considered to be a revolutionary material, one of the highest known strength materials, but also has good toughness and can be bent.

In terms of thermal conductivity, the thermal conductivity of pure defect-free single-layer graphene is as high as 5300W/mK, which is the carbon material with the highest thermal conductivity, higher than single-walled carbon nanotubes and multi-walled carbon nanotubes. When it is used as a carrier, the thermal conductivity can reach 600W/mk. In addition, the ballistic thermal conductivity of graphene can lower the lower limit of the ballistic thermal conductivity of carbon nanotubes per unit circumference and length.

The heat dissipation structure of Huawei Mate30 Pro is very well designed, including heat dissipation copper tubes, graphite sheets and graphene. The combination of the three can achieve very efficient and uniform heat dissipation. While the Redmi K30 uses a liquid cooling system that is rare on models of the same price.  

Which is better for graphene heat dissipation or graphite sheet heat dissipation?

The fast thermal conductivity and fast heat dissipation characteristics of graphene make graphene an excellent heat dissipation material for the heat dissipation of smart phones, tablet handheld computers, high-power energy-saving LED lighting, super LCD TVs, etc. Graphite sheet heat dissipation technology has been widely used due to graphite's high thermal conductivity and relatively low cost and easy production. Many brands including iPhone, LG, Xiaomi, ZTE and other mobile phones have adopted graphite heat dissipation technology.

Graphene and graphite sheet of the same thickness, the performance of graphene film is not as good as that of graphite film. The key point is that graphene film has performance advantages above the thickness (150um), and its cost is higher than graphite sheet.