Experimental results show that the new high-temperature resistant technology based on graphene can increase the upper limit of the use temperature of lithium-ion batteries by 10°C, and the service life is twice that of ordinary lithium-ion batteries.
Regarding smart phones, the charging rate of mobile phones using graphene technology is 40% higher than that of ordinary mobile phones. Foreign research institutions have developed a lithium battery cathode material for mobile phones with high-speed charging in 20 seconds through graphene. Even mobile phone screens with higher flexibility can be made.
The chief scientist of Watt Laboratories pointed out that the breakthrough of graphene-based high-temperature lithium-ion battery technology mainly comes from three aspects: adding special additives to the electrolyte to remove trace amounts of water and preventing high-temperature decomposition of the electrolyte; the battery positive electrode uses a modified large single Crystal ternary material improves the thermal stability of the material; at the same time, the new material graphene is used to achieve efficient heat dissipation between the lithium-ion battery and the environment.
"Charge and discharge tests in a high temperature environment show that under the same working parameters, the temperature rise of the graphene-based high temperature lithium ion battery is 5°C lower than that of an ordinary lithium ion battery; 2000 cycles at 60°C, the capacity retention rate still exceeds 70% ; Stored at a high temperature of 60℃ for 200 days, the capacity loss is less than 13%"
In addition, this research result will bring innovation to the energy storage business of communication base stations. The working life of the external base station using this high-temperature lithium-ion battery in hot areas can reach more than 4 years. Graphene-based lithium-ion batteries will also help electric vehicles last for a long time in high-temperature environments, as well as the safe flight of drones under high-temperature heating.
Last year, Watt Laboratories announced the fast charging technology that can fully charge 48% of the 3000mAh battery in 5 minutes, which has aroused widespread concern in the industry.
In addition, the University of Manchester in the United Kingdom collaborates on the application of graphene and jointly develops the next generation of high-performance technologies in the ICT (Information and Communication Technology) field. It will provide vital basic support for the development of the information and communication industry in the future and build a better fully connected world.
The Samsung research team has developed a technology to make a new "silicon cathode material" by covering the silicon surface of the battery with graphene, which increases the energy density of the battery by up to 2 times that of the existing battery. In other areas, Intel and IBM have also actively deployed graphene technology research.
However, at present, graphene-based batteries are mainly used in the energy storage business of communication base stations, as well as in fields such as electric vehicles and drones. It is not clear when they will be used on smartphones. And if it is used on a mobile phone in the future, the battery temperature control will be increased by 10 degrees, which will liberate the performance of the mobile phone processor, which will undoubtedly provide a great supply for the smoothness and performance improvement of future smart phone control. s help.