Multi-multiplying power charging-discharging lithium ion battery and method for producing the same

A lithium-ion battery, charging and discharging technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as unfavorable charging and discharging, the influence of electron flow, and easy platinum leakage

Inactive Publication Date: 2009-08-05
深圳市崧鼎实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this also affects the flow of electrons at the same time. If the density is too high, it is not conducive to charging and discharging, and if the density is too small, it will easily leak platinum.

Method used

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  • Multi-multiplying power charging-discharging lithium ion battery and method for producing the same
  • Multi-multiplying power charging-discharging lithium ion battery and method for producing the same
  • Multi-multiplying power charging-discharging lithium ion battery and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Dissolve polyvinylidene fluoride-perfluoropropylene (PVDF-HFP) in N-methylpyrrolidone (NMP), the stirring speed is 30r / min for revolution, 300r / min for rotation, and add nano-SiO in stages after stirring evenly 2 and lithium manganate, the weight ratio of each component is lithium manganate: nanometer SiO 2 :PVDF-HFP=90:5:5. Coat the evenly stirred slurry on the aluminum foil current collector. The oven temperature of the coating machine is 75°C. After drying, the coating surface density is 280mg / 10cm 2 , the compacted density is 3.1g / cm 3 . Cut and spot-weld the aluminum lug 4 to obtain the positive pole piece 1 .

[0061] Dissolve sodium carboxymethyl cellulose (CMC) in high-purity deionized water, stir at a speed of 30r / min for revolution and 300r / min for rotation, and add nano-SiO in stages after stirring evenly 2 , mesophase carbon microspheres (CMB) and styrene-butadiene rubber (SBR), the weight ratio of each component is CMB: nano-SiO 2 :SBR:CMC=93:4:1.5:1.5...

Embodiment 2

[0070] Dissolve polyvinylidene fluoride-perfluoropropylene in N-methylpyrrolidone (NMP), and stir at a revolution speed of 30r / min and an autorotation speed of 300r / min. After stirring evenly, add nano-Ag and lithium manganate in stages, each group The weight ratio of parts is lithium manganese oxide:nano Ag:PVDF-HFP=96:2:2. Coat the evenly stirred slurry on the aluminum foil current collector. The oven temperature of the coating machine is 75°C. After drying, the coating surface density is 250mg / 10cm 2 , the compacted density after rolling is 3.15g / cm 3 . Cut and spot-weld the aluminum lug 4 to obtain the positive pole piece 1 .

[0071] Sodium carboxymethylcellulose (CMC) is dissolved in high-purity deionized water, and after stirring evenly, nano-Ag, mesocarbon microspheres (CMB) and styrene-butadiene rubber (SBR) are added in stages, and the weight composition ratio of each component is It is CMB:Nano Ag:SBR:CMC=94:3:1.5:1.5. Coat the evenly stirred slurry on the coppe...

Embodiment 3

[0074] Dissolve polyvinylidene fluoride-perfluoropropylene in N-methylpyrrolidone (NMP), stir at a revolution speed of 30r / min, and rotate at 300r / min, and add nano-Al in stages after stirring evenly 2 o 3 and lithium manganate, the weight ratio of each component is lithium manganate: nanometer Al 2 o 3 :PVDF-HFP=92:3.5:4.5. Coat the uniformly stirred slurry on the aluminum foil current collector. The oven temperature of the coating machine is 75°C. After drying, the coating surface density is 270mg / 10cm 2 , the compacted density after rolling is 3.0g / cm 3 . Cut and spot-weld the aluminum lug 4 to obtain the positive pole piece 1 .

[0075] Dissolve sodium carboxymethylcellulose (CMC) in N-methylpyrrolidone (NMP), stir at a speed of 30r / min for revolution and 300r / min for rotation, and add nano-Al in stages after stirring evenly 2 o 3 , mesophase carbon microspheres (CMB) and styrene-butadiene rubber (SBR), the weight ratio of each component is CMB:nano Al 2 o 3 :SBR:...

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Abstract

The invention provides a high-rate charge-discharge lithium-ion battery and a preparation method thereof. The anode active material of the lithium-ion battery is lithium manganate; the cathode active material is selected from one or more of mesocarbon microbeads, artificial graphite or natural graphite coated by mesophase pitch; a conductive agent is selected from one or more of conductive graphite, conductive carbon black, nano Ag, nano SiO2 or nano Al2O3. The preparation method of the lithium-ion battery comprises the preparation of the anode plate, the parathion of the cathode plate and the assembly of the battery. The lithium-ion battery has the advantages of high-rate charge-discharge performance, long cycle life, high capacity, safe use, environmental protection, low cost and the like. The preparation method has the advantage of simple and easy process operation, and is applicable to the mass production.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a high-rate charge-discharge lithium-ion battery and a preparation method of the lithium-ion battery. Background technique [0002] With the depletion of fossil energy and the enhancement of people's awareness of environmental protection, lithium-ion batteries are more and more popular with users due to their high energy density, high power density, and long cycle life. Digital appliances and mobile communication terminals and other equipment. However, in terms of large-scale power equipment such as electric tools and electric vehicles, the application of lithium-ion batteries is still relatively small, because lithium-ion batteries used in small electrical appliances only need to provide a gentle, small, and stable discharge current, while the use of large-scale power equipment The environment sometimes requires the battery to have the characteristics of instantaneous high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M4/36H01M4/38H01M10/40H01M4/04H01M10/38
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 杜洪彦卢舜毅赖见
Owner 深圳市崧鼎实业有限公司
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