Heteroatom-doped enzymatic hydrolysis lignin-based porous hard carbon material and preparation method thereof

• Main Authors: JIA YANGJIE, ZHANG ZHUOYA, GU HONGLI
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a heteroatom-doped enzymatic hydrolysis lignin-based porous hard carbon material, which is prepared from the following raw materials: 100 parts of enzymatic hydrolysis lignin, 20 to 40 parts of chitosan, 10 to 18 parts of cyanuric acid epoxy resin, 4 to 7 parts of sulfur-containing diamine and 20 to 30 parts of melamine. Two nitrogen sources are adopted to carry out N doping on the enzymatic hydrolysis lignin, cyanuric acid epoxy resin and chitosan are taken as the first nitrogen source to react with the enzymatic hydrolysis lignin, then melamine which is low in cost and easy to obtain is taken as the second nitrogen source, the carbon material with high nitrogen content is obtained through pyrolysis, and the carbon material with high nitrogen content is obtained by improving the conductivity of the material and increasing active sites. The first discharge capacity is improved; then KOH is used for activation to prepare the N-doped porous hard carbon negative electrode material, the p