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

A manufacturing method and technology of water-based glue, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of difficult to recover production costs, increase equipment investment, increase production costs, etc., to reduce environmental pollution and physical damage to employees. damage, good adsorption and chemical properties, the effect of reducing investment costs

Active Publication Date: 2008-10-15
袁植良
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  • Application Information

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 tempera

Method used

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Embodiment Construction

[0025] The following is a preferred embodiment of the specific manufacturing method of the lithium battery provided by the present invention:

[0026] 1. Preparation of battery positive electrode:

[0027] Positive electrode ratio: lithium cobaltate: conductive agent (acetylene black + flake graphite): primary binder (PEO, solid content about 4%): auxiliary binder (SBR, solid content 50%) = 95.35%: 2.85% (2:1): 1.1%: 0.7% (mass percentage of total slurry weight)

[0028] Positive electrode slurry preparation and stirring process: Step 1, add the main binder into the mixing tank, add 12% deionized water accounting for the total weight of the slurry, and stir at a speed of 30-40Hz for 15 minutes;

[0029] In the second step, add a conductive agent (acetylene black+flake graphite, acetylene black: flake graphite=2:1) ​​accounting for 1.51% of the total weight of the slurry, and stir for 60 minutes at a speed of 40-50Hz;

[0030] Step 3, add active substance lithium cobaltate ac...

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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...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/02H01M4/04H01M10/40H01M10/38
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 李中延杜国章
Owner 袁植良
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