Recently, wan gang, minister of the ministry of science and technology of the People's Republic of China, summed up the achievements in the development of new energy vehicles by saying that "the price of power battery system has dropped below 2 yuan/watt-hour, while the production capacity has reached 200G watt-hour, basically meeting the needs of industrialization and the market How did the price of power batteries become the price of cabbage? Recently, the "graphite and graphene materials for high-performance lithium ion batteries" project from shenzhen won the second prize of national technological invention award, which is the scientific research achievement of professor kang feiyu's team from shenzhen graduate school of Tinghua University and professor Yang quanhong's team from tianjin university.