To avoid these problems, Apple plans to use graphene blocks for cooling in the iPhone 16 series. It is stated that graphene provides better thermal conductivity than copper, therefore heat can be distributed better with the use of graphene.
The thermal conductivity of graphene is twice that of copper
At room temperature, graphene has a thermal conductivity of 5000 watts/meter-kelvin. This value is 2 times that of copper and 3 times that of silver. Thanks to the use of graphene, Apple can integrate more powerful processors into its phones without the need for fans, allowing the phones to run cooler. It is not clear whether this technology, which is still at the rumor level, will definitely come to the iPhone 16s.