Research on aluminum ion batteries using graphene as electrodes

Research on aluminum-ion batteries using graphene as electrodes. Electrochemical energy storage technology is a key technology to solve grid-connected power generation of electric vehicles and renewable energy. Lithium batteries using organic solvents as electrolytes have the advantage of energy density, but there are potential safety hazards and lithium resources are limited. The water system non-lithium battery (such as sodium ion, potassium ion, zinc ion, magnesium ion, etc.) has the advantages of high safety and low cost, and has important application prospects in the field of energy storage. Since 2013, Ningbo's Dynamic Lithium Battery Engineering Laboratory, Institute of Information Technology and Engineering, and Chinese Academy of Sciences have forward-looking research on new concepts for non-lithium ion batteries, and have made a series of progress on the basis of new concepts. Research the water system of ion batteries. However, the cycle life of river ion batteries is relatively limited, generally less than 1,000 times, which is difficult to meet the requirements of large-scale energy storage. It was reported by Hongjiedai, a professor at Stanford University in the United States in 2015 (2015, 520, 324) that a new type of aluminum-ion battery and power lithium battery was stimulated by the Ningbo Information Engineering Laboratory to open graphene electrode aluminum-ion battery for discussion. For this work, researchers choose flexible anode, multi-layer graphene processed metal as anode, aluminum ion liquid as electrolyte, long cycle life, high performance 2v aluminum ion battery. The results show that the thickness (number of layers) and lateral scale of the two-dimensional flake graphite anode have an important influence on the embedding behavior of AlCl4 ions. Compared with flake graphite, there are 1000 layers. The number of layers of multilayer graphene is very small (less than 10 layers), which can significantly reduce the activation energy of AlCl4-ion insertion and diffusion, so that the battery has ultra-high multiplier performance, so charging and The discharge may be completed within 1 minute. On the other hand, the multi-layer graphene electrode consists of a larger scale with better flexibility and degree of graphitization, and more tolerant repeated insertion and deletion of AlCl4-ions, and then allows the battery to perform extremely long cycle life, almost nothing Attenuation capacity after 10,000 years of charge and discharge cycles. In addition, through a series of fine characterizations, the research work further revealed the intercalation chemical mechanism of AlCl4- ions in two-dimensional graphite such as multilayer graphene, graphite and other positive electrode data, that is, the intercalation ion induces fourth- and fifth-order structural changes. mechanism. The research work not only has important guiding significance for the selection of graphite cathode data in aluminum ion batteries, but also has important academic value for the development of practical graphene-based new long-life energy storage batteries. The above-mentioned research work has won the key deployment project of the Chinese Academy of Sciences (kgzd-ew-t08-2), which promotes the youth of the Chinese Academy of Sciences (2017341), the National Natural Science Foundation of my country (51404233) and the Zhejiang Natural Science Foundation (LY15B030004). Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous post: Why didn't graphene batteries replace lithium batteries?