GAC Group's graphene battery research and development work is continuing and the product is expected to be tested for mass production in real vehicles by the end of this year, the Shanghai-listed company said in recent communication with investors.

Whether the battery can eventually achieve mass production still needs to wait for the results of real vehicle verification, the company added.

GAC also said that the graphene battery is three-dimensional structure graphene added as an additive into the positive and negative electrodes of the battery to improve the charging performance of the battery.

Currently, GAC Group's relevant graphene technology has been patented, covering a number of technology areas such as graphene preparation, supercapacitors, and fast-charging batteries, the company said.

GAC's graphene technology was announced at GAC's Technology Day in July this year. The company said at the time that it had developed a super-fast-charging battery based on graphene's excellent electrical conductivity and special three-dimensional structure.

It can achieve a charging speed comparable to refueling, with an 8-minute 80% charge and a 10-minute charge to achieve a range of 200-300 kilometers.

At present, GAC has initially verified the graphene technology from the cell, module and carrying the whole vehicle at several levels.

Graphene materials are mainly used in many fields such as fast-charging lithium-ion batteries, supercapacitors, lithium-sulfur batteries, and lightweight body materials. However, the high cost has been a barrier to achieve mass production applications.

The GAC 3DG preparation method is claimed to be simple, stable and efficient, and the 3D multi-stage pore structure graphene obtained can effectively overcome the cost defect, and the production preparation cost can reach 1/10 of the conventional preparation method.