PREPARATION METHOD FOR AND USE OF POROUS MICROSPHERE CARBON NEGATIVE ELECTRODE MATERIAL

• Main Authors: RUAN, Dingshan, FENG, Maohua, LIU, Baoye, LI, Changdong, WU, Xingyu
• Format: Patent
• Language: Chinese; English; French
• Published: 05.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A preparation method for a porous microsphere carbon negative electrode material, which method comprises: mixing plant fibers with a halogenated lithium salt to obtain a mixed solid; heating the mixed solid, and introducing an oxidizing gas to obtain a pre-dissociated substance; mixing the pre-dissociated substance with a dissociation solution, and heating same for a reaction to obtain a cellulose dissociation solution; adding a hybrid to the cellulose dissociation solution, and subjecting the hybrid solution to spray drying to obtain a microsphere precursor; and heating the microsphere precursor in an inert atmosphere to obtain the porous microsphere carbon negative electrode material. In the prepared porous microsphere hard carbon negative electrode material, porous microspheres have rich defect pores, such that the specific surface area can be increased, active sites can be increased, and contact between an electrode and an electrolyte can be promoted; therefore, the reversible lithium storage capacity of