Aqueous glue, lithium battery applying the aqueous glue and manufacturing method for the lithium battery

Abstract

The invention provides a water-base cement which consists of a main adhesion agent, an auxiliary adhesion agent and a defoaming agent which are mixed according to the weight ratio of 20-30:1-3:1-5, wherein, the main adhesion agent is a mixed liquor prepared by one or a plurality of polyethylene glycol oxide, sodium carboxymethyl cellulose or polyvinyl alcohol with de-ionized water, and the solid content thereof is between 1 percent and 10 percent; the auxiliary adhesion agent is the mixed liquor prepared by one or two of butadiene styrene rubber or polyfluortetraethylene with the de-ionized water, and the solid content thereof is between 30 percent and 70 percent; the defoaming agent is one or a plurality of ethanol, glycol or propanediol which are mixed for use. The water-base cement has low cost, is innoxious and environment-friendly. The invention also provides a lithium battery which uses the water-base cement and a manufacturing method for the lithium battery.

Description

technical field [0001] The invention relates to the field of manufacturing lithium batteries, in particular to the cathode slurry system of lithium batteries Background technique [0002] With the development of microelectronics technology in the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements on power supply. Lithium batteries have higher weight-to-energy ratio and volume-to-energy ratio; high voltage, the voltage of a single-cell lithium battery is 3.6V, which is equal to the series voltage of 3 Ni-Cd or Ni-MH rechargeable batteries; small self-discharge can be stored for a long time, which is The most prominent advantage of this battery is that there is no memory effect, and the lithium battery does not have the so-called memory effect of the nickel-cadmium battery, so the lithium battery does not need to be discharged before charging; the service life is long. Under normal working conditions, the number of charge / disch...

AI Technical Summary

Problems solved by technology

The use of oily systems has many disadvantages: 1. NMP itself has certain toxicity, which is not good for the health of production employees and is not conducive to environmental protection; 2. Compared with water systems, NMP has a higher price and is not easy to recycle, which increases production costs; 3. NMP has a high boiling point , the oven temperature setting is relatively high during coating and subsequent baking of pole pieces, which increases energy consumption and increases production costs; 4. The ingredients and coating environment have high humidity requirements, and the ingredients and coating workshops need to install corresponding dehumidification equipment, increasing equipment investment