Updated at: 2019-07-01Recently, cao xiaoyu, a professor at henan university of technology, prepared a new composite anode material for the first time, which can improve the electrochemical properties of lithium vanadate, a anode material for rechargeable lithium batteries.The research is published online in the journal applied materials and interfaces of the American chemical society.Lithium ion battery is considered as one of the most promising energy storage methods due to its high energy density, which has been applied commercially in the field of electric vehicles. It is still the unremitting pursuit of researchers to continue to improve the energy density of lithium ion battery.At present, the capacity of lithium ion batteries is mainly determined by the capacity of anode materials, and finding anode materials with high discharge capacity and stability is the key to improve the energy density of lithium ion batteries.Can be more electronic transport layered vanadium acid lithium anode materials with high discharge capacity, due to its low cost and good security aroused people's concern, but the material low electronic conductivity, irreversible phase transition charge and discharge process, and part of the vanadium elements dissolve in the electrolyte, leading to material performance and cycle performance.The researchers prepared high-capacity lithium vanadate anode materials by flow-phase reaction method, and prepared lithium vanadate/polydiphenylamine composite anode materials for the first time by on-site oxidation polymerization reaction with diphenylamine monomer.Among them, the main chain of polydiphenylamine not only has the structure of poly (p) -benzene with high conductivity, but also has the structure of aniline with high energy density, which has ultra-fast electron transfer rate, good hole transport capacity and good REDOX reversibility