Surface-mounted super capacitor and preparation method thereof

A supercapacitor, chip technology, applied in the field of electrochemistry, can solve the problems of difficult breakthrough in the structure design of chip devices, and achieve the effects of low cost, low environmental pollution, degradability, etc.

Active Publication Date: 2017-04-26
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the market for chip capacitors is huge, due to the difficulty in breaking through the structural design of chip devices, supercapacitors with traditional plug-in structures are still the mainstay at present.

Method used

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  • Surface-mounted super capacitor and preparation method thereof
  • Surface-mounted super capacitor and preparation method thereof
  • Surface-mounted super capacitor and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0024] Such as figure 1 Shown, is the flow chart of the preparation method of the patch type supercapacitor of this specific embodiment, comprises the following steps:

[0025] U1, prepare the active material slurry.

[0026] The above-mentioned active material slurry is used for subsequent formation of electrodes. The active material slurry can be prepared by mixing the active material with the conductive agent and the binder, adding an organic solvent, and stirring thoroughly. By controlling the different proportions of various materials, the conductivity and rheological properties of the slurry can be changed. Preferably, the active material slurry is prepared by mass ratio of 60%-90% active material, 5%-30% conductive agent and 5%-10% binder, adding an appropriate amount of solvent and stirring uniformly for 2-6 hours. By applying the formula to supercapacitors, the electrode active materials can be better played.

[0027] In the above active material slurry, the activ...

Embodiment 1

[0052] 1. Mix the active material slurry according to the mass ratio of active material, binder, and conductive material at 8:1:1, add solvent N-methylpyrrolidone, and stir for 4 hours. The active material is activated carbon slurry; the binder is polyvinylidene fluoride; the conductive agent is conductive carbon black.

[0053] 2. Select cellulose paper with a thickness of 35 μm as the substrate 1, epoxy resin as the high-temperature resistant resin, and infiltrate the epoxy resin on the substrate by screen printing to form several pieces with an area of ​​32×25mm 2 The frame cofferdam 2 is placed in an oven until the resin is cured, and the frame line width of the frame cofferdam is controlled within 300 μm.

[0054] 3. Based on the orifice printing process, the active material slurry is printed in the cofferdam 2 of the paper substrate 1, and the area of ​​each electrode material 3 formed is 12×20mm 2 , the distance between two pieces of electrode material 3 is 0.4 mm. Af...

Embodiment 2

[0062] The specific preparation process is the same as in Example 1, except that the active material replaces the active carbon slurry in Example 1 with a mixture of carbon nanotubes and molybdenum disulfide, and the binder replaces the polyvinylidene fluoride in Example 1 with polyvinyl alcohol. Ethylene, conductive agent replaces the conductive carbon black in embodiment 1 with acetylene black.

[0063] In this embodiment, the composition of the electrode material is adjusted relative to the embodiment 1, and the rest of the processes are the same. After verification, the volt-ampere scan diagram, constant current charge-discharge curve diagram and the voltammeter scan diagram before and after enduring high-temperature reflow soldering of the supercapacitor made are the same as those in Example 1. Figure 4~6 similar and will not be listed here.

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Abstract

The invention discloses a surface-mounted super capacitor and a preparation method thereof. The method comprises: S1, an active substance slurry is prepared; S2, high-temperature-resistant resin being resistant to the high temperature of over 260 DEG C is printed on a paper substrate in a silk-screen printing manner, the igh-temperature-resistant resin is infiltrated into the paper substrate to form a frame cofferdam, and then heating is carried out to solidify the high-temperature-resistant resin; S3, the active substance slurry obtained by the S1 is printed in the cofferdam obtained at the S2, drying is carried out after printing, and one pair of spaced electrodes is formed in the cofferdam; S4, current collectors being resistant to the high temperature of over 260 DEG C are prepared on one pair of electrodes obtained at the S3; S5, the cofferdam is filled with an electrolyte and thus the electrolyte at least fills the relative gap between the one pair of electrodes distributed in the cofferdam; and S6, device packaging is carried out to obtain a surface-mounted super capacitor. A super capacitor having a surface-mounted structure can be prepared; and the super capacitor has advantages of having low cost, being friendly to the environment, and being resistant to a reflow soldering impact.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of electrochemistry, in particular to a chip supercapacitor and a preparation method thereof. [0003] 【Background technique】 [0004] 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. Currently, new green energy mainly includes solar energy, wind energy, and nuclear energy. Energy storage devices are common devices that can better convert energy, and have been successfully used in transportation, wireless communication equipment, power grids, consumer electronics and other fields. [0005] Electrochemical capacitor (supercapacitor) is a new type of energy storage element, which can directly convert chemical energy into electrical energy. It has the characteristics of ordinary ceramic capacitors and batteries, and has high power density, long charge and discharge cycle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/78
CPCY02E60/13H01G11/84H01G11/78H01G11/86
Inventor 杨诚王洋石璐吴铛
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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