It was learned from the Chinese Academy of Sciences on October 11 that Liu Jinhuai, an associate researcher of the Research Institute of Intelligent Machinery, Hefei Institute of Material Science, Chinese Academy of Sciences, and Liu Jinyun, the research team of Huang Xingjiu, have made new achievements in developing high-performance graphene lithium-ion batteries Lifetime 3D graphene nanocomposite lithium ion battery material. The research results were published in the international journal "Advanced Materials" and were selected as the front papers.
Liu Jinyun and others cooperated with the University of Illinois at Urbana-Champaign and the Chinese Academy of Sciences Hefei Research Institute to develop a three-dimensional graphene-based composite battery material with high active material loading, short ion electron transmission paths, and electrode materials assembled into battery cells. It is necessary to use any additives such as a binder and a conductive agent, and the battery has high capacity and excellent cycle stability. The developed three-dimensional graphene / vanadium pentoxide battery cathode material has a battery capacity of more than 200 mAh / g after 2,000 cycles under full charge / discharge conditions in 12 minutes (a lot of literature reports less than 1,000 times, and the capacity is generally lower than 150 mAh / g); and the capacity of charging in 1 minute reaches a similar capacity of more than 5 minutes in commercial and literature reports. In addition, the three-dimensional graphene composite battery material structure design can also be applied to lithium ion battery anode materials, such as the development of graphene / silicon composite anodes, showing good versatility.