PLANT POMPON HARD CARBON COMPOSITE NEGATIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF

• Main Authors: RUAN, Dingshan, FENG, Maohua, LIU, Baoye, LI, Changdong, WU, Xingyu
• Format: Patent
• Language: Chinese; English; French
• Published: 31.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A plant pompon hard carbon composite negative electrode material, and a preparation method therefor and the use thereof. Raw materials for preparing the hard carbon composite negative electrode material comprise: a plant pompon, an oxidizing agent, a lithium source, a dispersing agent, and a carboxyl-containing lithium salt, wherein the lithium source is at least one of LiAlO2, Li2SiO3 and LiSnO2. The three-dimensional micron structure of the hard carbon composite negative electrode material has abundant pores, such that the specific surface area and conductivity of the hard carbon composite negative electrode material are improved; by introducing heteroatom materials such as N and O into the carbon of the hard carbon composite negative electrode material, the electrochemical performance thereof can also be improved; and since the electronic arrangement modes of N and C atoms are similar, C in a carbon framework is more easily substituted by the N atoms, such that the surface functional groups of the carbon m