Huawei's graphene battery principle has been revealed: better than ordinary lithium ion battery

On December 1, Watt laboratory, Huawei central research institute announced at the 57th battery conference in Japan that it had achieved a major research breakthrough in the field of lithium ion battery and launched the industry's first high-temperature and long-life graphene-based lithium ion battery.

The experimental results showed that graphene based new high temperature resistant technology can use lithium ion battery limit temperature of 10 ℃, the service life is 2 times the normal lithium ion battery.

It is known that Huawei graphene-based lithium ion battery is mainly suitable for high-temperature extreme environment. Its principle is to significantly improve the thermal stability of the battery by adding high-temperature anti-decomposition additives into the electrolyte, combining with high-temperature stability of large single crystal cathode, and at the same time using graphene for efficient heat dissipation.

Dr. Yangxing Li, chief scientist of Huawei watt laboratory, pointed out that the technological breakthrough of graphene-based high-temperature lithium ion battery mainly came from three aspects:

1, add special additive to the electrolyte, removal of trace water, avoid the high temperature of the electrolyte decomposition;

3, selection of battery positive electrode modification of large single crystal ternary material, improve the thermal stability of materials;

4, graphene, a new material, can achieve efficient heat dissipation between lithium-ion batteries and the environment.

Charge and discharge test showed that the high temperature environment under the same working parameters, the graphene based high temperature lithium ion battery than ordinary lithium ion battery to reduce temperature 5 ℃;60 ° C high temperature cycle 2000, retention capacity is still more than 70%;60 ℃ high temperature storage for 200 days, capacity loss is less than 13%.

Huawei stated that the research results will bring innovation to the energy storage business of communication base stations. The service life of the plug-in base station of the high-temperature lithium ion battery can reach more than 4 years in hot regions. Graphene-based lithium-ion batteries will also help electric cars last longer and drones fly safely at high temperatures.

The page contains the contents of the machine translation.