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Pole piece, energy storage device and preparation method of pole piece

A device and energy storage technology, applied in the field of electrochemistry, can solve the problems such as the inability to meet the requirements of light and thin electronic equipment, the decline of the electrical performance of the device, the large size and volume, etc., to achieve a small overall size, prevent electrolyte leakage, and maintain device structure. Effect

Inactive Publication Date: 2015-05-06
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems in the application of this kind of energy storage device are as follows: first, the size and volume are large, which cannot meet the application requirements of the current development of thinner and smaller electronic equipment
Second, the reliability is poor, the electrical performance of the device is significantly reduced when subjected to external pressure and vibration, and the pressure resistance performance is poor
In addition, electrolyte leakage often occurs when external shocks occur.

Method used

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  • Pole piece, energy storage device and preparation method of pole piece
  • Pole piece, energy storage device and preparation method of pole piece
  • Pole piece, energy storage device and preparation method of pole piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The current collector selects a titanium plate with a thickness of about 40 μm, and cuts it into a rectangle of 8 cm×10 cm. The resin glue is selected from hot melt glue.

[0044] A1) Preparation of current collector with grid: Fix the current collector on the printing platform, select a three-dimensional printer with a layer height of 0.08mm, a peripheral layer thickness of 0.1mm, and a filling density of 90%, using hot-melt glue as a raw material. A hot melt adhesive grid is constructed on the current collector. At room temperature, place for 2-5 hours to dry and solidify. The grid formed on the current collector has a height of 0.2mm and a cell area of ​​0.3cm 2 .

[0045] A21) Deposit positive active material on the current collector with grids: prepare a 0.1M-3M manganese acetate solution, and ultrasonically treat it for 10-120 minutes to obtain a uniform manganese acetate solution. One side of the current collector obtained in step A1) is pasted with insulatin...

Embodiment 2

[0051] For the current collector, select a stainless steel sheet with a thickness of about 10 μm and a graphite paper with a thickness of 50 μm, and cut it into a rectangle of 10 cm×15 cm. Put the stainless steel sheet into a mixed solution of acetone and alcohol with a volume ratio of 1:3 for ultrasonic treatment for 0.5-3 hours, and finally dry it in an oven at 70-100°C for future use. The resin glue selects polyurethane for use.

[0052] B1) Preparation of current collector with grid: Take the above stainless steel sheet, seal one side with tape, and fix it on the printing table together with graphite paper, and select the line width, line spacing and thickness of 0.15mm, 5mm, and 1mm respectively Copper orifice plate is used for printing, add appropriate amount of polyurethane glue on the orifice plate, scrape it evenly with a scraper, make the polyurethane glue pass through the gap to form parallel lines on the stainless steel sheet and graphite sheet, and place it at roo...

Embodiment 3

[0058] The current collector chooses a titanium plate with a thickness of about 30 μm and an area of ​​10 cm×9 cm. The resin glue is selected from hot melt glue.

[0059] Pretreatment of the current collector: a microstructure of nickel cone arrays is formed on the surface of the current collector. In this embodiment, the nickel tip array structure is formed through the following steps:

[0060] Press the surface of the current collector down to the polishing pad, and perform chemical mechanical polishing under the action of the polishing liquid for 10 minutes. After taking it out, rinse it with deionized water for 2-3 times. After drying, the current collector is obtained. On one side of the current collector Paste the insulating glue for later use.

[0061] Mix 1.5mol / L nickel chloride solution, 1mol / L boric acid solution, and 1.0mol / L ammonium chloride solution. After mixing, the molar ratio of nickel chloride, boric acid and ammonium chloride is 1:0.8:1 , placed in a wa...

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Abstract

The invention discloses a pole piece, an energy storage device, and a preparation method of the pole piece. The method comprises the following steps: (1) preparing a plurality of current collectors and hdrophobic resin adhesive, and forming hydrophobic resin adhesive grids on the current collectors; (2) respectively preparing positive and negative active substance materials, respectively filling cell spaces of the resin grids of the current collectors with the positive and negative active substance materials, and respectively preparing a positive pole piece and a negative pole piece; (3) preparing colloid electrolyte, and respectively covering the active substance materials of the positive pole piece and the negative pole piece with the colloid electrolyte; and (4) carrying out opposite hot-pressing on the positive pole piece and the negative pole piece obtained in the step (3), or carrying out opposite hot-pressing on the positive pole piece or the negative pole piece and another current collector coated with the active substance on the surface to prepare the energy storage device. The energy storage device disclose by the invention has tailorability, can meet the application requirements of miniaturization and individuation, and has high reliability and rapid charge and discharge characteristics.

Description

【Technical field】 [0001] The invention relates to the field of electrochemistry, in particular to a pole piece, an energy storage device and a preparation method thereof. 【Background technique】 [0002] After entering the 21st century, the search and development of new green energy has become the best choice to deal with the two major problems of energy depletion and environmental degradation. At present, new green energy mainly includes solar energy, wind energy, and nuclear energy. Energy storage device is a common device that can better store and convert energy, and has been successfully applied in transportation tools, wireless communication equipment, power grids, consumer electronics industries and other fields. [0003] Current energy storage devices, such as batteries, capacitors, and supercapacitors, generally include positive electrodes, negative electrodes, separators, electrolytes, and casings. During preparation, the active material material is first coated on ...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139H01M10/058H01G11/28H01G11/84H01G11/86
CPCY02E60/10Y02P70/50
Inventor 杨诚谢炳河
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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