Preparation method of sodium alginate-based dual-network carbon aerogel negative electrode material for lithium ion battery

• Main Authors: LIU RAN, SUN ZIYU, CHEN XIAOHONG, SHEN ZEBO, LIANG ZEQIAN
• Format: Patent
• Language: Chinese; English
• Published: 20.07.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method of a sodium alginate-based dual-network carbon aerogel negative electrode material for a lithium ion battery, and belongs to the technical field of lithium ion battery negative electrode materials. The method comprises the following steps: firstly, preparing a certain amount of sodium alginate powder and agar powder into precursor hydrogel by adopting a sol-gel method; preparing a Mn (NO3) 2 solution and ZnCl2 particles into a mixed solution according to a certain proportion, and immersing the precursor hydrogel into the mixed solution for 6-9 hours to obtain dual-network hydrogel; washing the prepared hydrogel with deionized water for multiple times, and freeze-drying to obtain fluffy double-network aerogel; and finally, carrying out high-temperature carbonization under the protection of inert gas to obtain the sodium alginate-based dual-network carbon aerogel negative electrode material. The operation method is simple and easy to implement, the used raw materials