A preparation method of a modified lithium ion battery electrode

Abstract

The invention relates to a preparation method of a modified lithium ion battery electrode, The cathode and anode of an additive are prepared by using a graphite rod as an arc method, The cathode and anode of the two graphite rods are oppositely placed in a reaction medium of liquid nitrogen, liquid argon or water, and the high-voltage current is fed into the reaction medium for DC arc discharge toobtain the additive carbon nanohorn or carbon onion, and then the 300V-500V voltage is applied under the atmosphere of either nitrogen or ammonia gas or a mixture of the two gases for reacting for aperiod of time to obtain the modified additive, and the modified additive is added into the electrode slurry composed of active material, a solvent, a binder and a conductive agent to obtain the modified lithium ion battery electrode by high-speed stirring under vacuum ring. The invention has the advantages of effectively enhancing the electric conductivity and the thermal conductivity of the electrode, effectively improving the lithium ion adsorption performance of the negative electrode, effectively extracting the specific energy density and the specific power density of the electrode, and prolonging the circulating service life of the electrode.

Description

technical field [0001] The invention belongs to the technical field of battery electrode preparation, and in particular relates to a preparation method of a modified lithium ion battery electrode. Background technique [0002] Lithium-ion battery is a common storage battery on the market at present. Because of its large capacity and long service life, it is very popular among users. However, although the lithium-ion batteries currently on the market meet people's needs for small volume, large capacity, and long-lasting battery life to a certain extent, as people use lithium-ion batteries, they find that lithium-ion batteries still have the following problems: Defects: 1. The specific energy density and specific power density of the electrode are low, and the electrical conductivity and thermal conductivity are poor; 2. The lithium ion adsorption performance of the negative electrode is poor, and lithium ions cannot be adsorbed in time and effectively during use, resulting in...

AI Technical Summary

Problems solved by technology

However, although the lithium-ion batteries currently on the market meet people's needs for small volume, large capacity, and long-lasting battery life to a certain extent, as people use lithium-ion batteries, they find that lithium-ion batteries still have the following problems: Defects: 1. The specific energy density and specific power density of the electrode are low, and the electrical conductivity and thermal conductivity are poor; 2. The lithium ion adsorption performance of the negative electrode is poor, and lithium ions cannot be adsorbed in time and effectively during use, resulting in weak electrical conductivity of the electrode ;3. During the long-term use of lithium-ion batteries, excessive heat is generated, and the heat generated by the electrodes cannot be dissipated in a timely and effective manner, which seriously affects the service life of the electrodes.