Aerogel flame-retardant microsphere for high nickel ternary lithium battery electrolyte and preparation method

Abstract

The invention belongs to the field of lithium batteries, and provides an aerogel flame-retardant microsphere for a high nickel ternary lithium battery electrolyte and a preparation method. The methodcomprises the steps that an aerogel flame-retardant microsphere inner layer material, namely, graphene oxide aerogel loaded nanometer magnesium hydroxide for the high nickel ternary lithium battery electrolyte is prepared; graphene oxide aqueous dispersion is atomized into a graphene oxide droplet microsphere through electrostatic spraying, distribution of graphene oxide in the microsphere body ofthe graphene oxide droplet microsphere formed through electrostatic spraying is extremely uniform, collection is conducted in an organic mixture, and a good sphere is obtained. By means of an ordinary spraying or fluidized bed, an aluminum hydroxide colloid is stuck to the surface of the microsphere and dried, and the aerogel flame-retardant microsphere for the high nickel ternary lithium batteryelectrolyte is obtained. The microsphere has the good normal temperature stability and high temperature sustainable flame retardance. In addition, at high temperature or in the burning process, graphene oxide aerogel makes contact with the electrolyte to form a circuit, the electrode internal resistance is increased, and the electrode voltage is lowered.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to an aerogel flame-retardant microsphere for an electrolyte solution of a high-nickel ternary lithium battery and a preparation method thereof. Background technique [0002] A lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It is different from a rechargeable battery. Lithium-ion batteries are different from lithium-ion polymer batteries. The inventor of the lithium battery is Edison. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of microelectronics technology at the end of the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements for p...

AI Technical Summary

Problems solved by technology

The existing method is to monitor changes in air pressure and temperature. Gas-sensitive and heat-sensitive materials sense the changes inside the lithium battery, but the application under special conditions has yet to be verified, such as changes in air pressure during air transportation; additives in the electrolyte Flame retardant additives and anti-overcharge additives, most of which will affect the cycle performance of lithium batteries

Moreover, when an abnormal situation occurs, the existing treatment method is only for the electrode or the electrolyte, and it is necessary to find a flame-retardant method for both the electrolyte and the electrode.