Method for rapidly preparing flexible battery by using carbon nanotube continuum

Abstract

The invention relates to a method for rapidly preparing a flexible battery by using a carbon nanotube continuum. The carbon nanotube continuum is used for directly coating active substances, dispersion of carbon nanotubes is not needed, a traditional polymer binder and a traditional conductive agent are removed from the lithium ion battery electrode, meanwhile, a metal current collecto for supporting r is not needed, and the lithium ion battery prepared from the electrode has the characteristics of higher rate capability, high safety, high energy density, flexibility and the like. According tothe method, the active substances can be directly compounded, for example, a positive electrode can be selected from lithium cobalt oxide, lithium manganate, lithium iron phosphate, a ternary material and the like, and a negative electrode can be selected from graphite, lithium titanate, silicon carbon and the like; battery cells are stacked according to the sequence of the negative plate, the diaphragm and the positive plate, and then sleeved with an outer package, the edge is sealed after injection of an electrolyte, and manufacturing of the battery is completed. The method can be used forquickly and directly preparing the flexible battery electrode by using the carbon nanotube continuum. The problems that an existing lithium ion battery is not high in rate capability, low in energy density, dangerous and the like can be effectively solved, the manufacturing method is simple and rapid, and commercialized production of the lithium ion battery is facilitated.

Description

technical field [0001] The invention relates to a method for rapidly preparing a flexible battery by using a carbon nanotube continuum, and specifically belongs to a method for preparing a composite electrode by coating an active material with a carbon nanotube and using it as an electrode of a lithium-ion battery to improve the existing flexible battery A technology of rate performance, safety performance and energy density. Background technique [0002] Due to its high energy density, long cycle life and environmental protection, lithium-ion batteries are widely used in various portable electronic devices, such as smart bracelets, smart phones, laptops, etc. In order to meet people's growing needs and the development and update of portable devices, lithium-ion batteries with lighter weight, larger capacity, longer cycle life, and even flexibility have become people's new needs. In the traditional preparation process of lithium-ion batteries, the flexibility is not good be...

AI Technical Summary

Problems solved by technology

There is no traditional binder above, and electrodes using carbon nanotubes as binder and coating active materials have certain electrochemical properties, but they are limited by the defects of the preparation process: the strength of electrodes prepared by physical mixed precipitation method is too low , easy to break, poor flexibility; the chemical synthesis method is easy to destroy the structure of carbon nanotubes, the process is too cumbersome, the cost is too high, etc., it is difficult to achieve large-scale preparation, and the difficulty of carbon nanotube dispersion hinders the performance of the above method In addition, the above studies are difficult to improve the safety performance of lithium-ion batteries