| abstract |
The invention discloses a lignin nitrogen-rich carbon/zinc oxide nano composite material and a preparation method and application thereof. (1) Dissolving lignin in an alkali solution, carrying out hydrothermal pretreatment, cooling, and adjusting the pH value to 3-5 to obtain an acid-soluble lignin solution; (2) adding a mixed solution of soluble zinc salt and soluble carbonate into an acid soluble lignin solution for hydrothermal reaction, adding hydroxymethylated melamine, and continuing the hydrothermal reaction to obtain a nitrogen-doped lignin/zinc oxide compound; (3) carbonizing the nitrogen-doped lignin/zinc oxide compound to obtain the lignin nitrogen-enriched carbon/zinc oxide nano composite material. In the composite material obtained by the invention, the lignin carbon is uniformly doped with nitrogen elements, and the lignin nitrogen-rich carbon is uniformly coated on the surfaces of zinc oxide particles to form a uniform carbon layer with a continuous structure, so that the problems of serious volume expansion and poor conductivity of zinc oxide as a lithium ion negative electrode material are solved, and the specific capacity, the first coulombic efficiency and the rate capability of the lithium ion battery are improved. |