High-purity copper-based battery based on plant activated carbon and preparation method thereof

A plant activated carbon, high-purity copper technology, applied in active material electrodes, secondary battery manufacturing, electrode manufacturing, etc., can solve the problems of poor battery cycle performance, limited battery power, easy to fall off, etc., to improve the charge/discharge performance. , the effect of increasing the diffusion coefficient and increasing the contact area

Pending Publication Date: 2019-06-21
凌飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different physical properties of the applied slurry and the current collector, the heating and curing during electrode preparation and the volume change during the long-term cycle charge / discharge of the battery often fall off because the combination between the active material and the current collector is not tight enough. And reduce the cycle charge / discharge life of the electrode
And in order to solve the problem of easy falling off, it is generally adopted to reduce the thickness of the coating as far as possible to reduce the volume change difference between the coating and the collector. Because the larger the surface area of ​​the carbon layer, the more ions or electrons stored on the collector. More, so a thinner coating will also cause the surface area of ​​the carbon layer to not increase, limiting the power of the battery
In addition, physical or chemical methods such as electrodeposition are used to deposit a carbon layer on the current collector. Although the problem that the carbon layer is easy to fall off is basically solved, there are still problems such as harsh preparation conditions, thinner carbon layer, and specific capacity. Low, and it is difficult to overcome the problem that the physical properties of the carbon layer and the current collector are different, and the cycle performance of the battery is poor

Method used

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  • High-purity copper-based battery based on plant activated carbon and preparation method thereof
  • High-purity copper-based battery based on plant activated carbon and preparation method thereof
  • High-purity copper-based battery based on plant activated carbon and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] S100: Shorten wheat straw and carbonize it at 300°C for 13 minutes, then carbonize it at 800°C for 20 minutes and cool it out of the oven to obtain wheat straw activated carbon; carbonize the wood residue at 500°C for 10 minutes, then carbonize it at 1000°C for 15 minutes The wood residue activated carbon is obtained by cooling in 1 minute, and the wheat straw activated carbon and the wood residue activated carbon are mixed according to the mass ratio of 1:3, and then crushed to a fineness of 1600 mesh, and the carbonized iodine value is 800, the ash content is 11 and the water content is <3. Plant activated carbon filler.

[0040] S200: Fully stir and mix the above plant activated carbon filler and the solid electrolyte at a ratio of 1:5 to obtain a mixed filler.

[0041] S300: Soak the high-purity copper mesh in 5% FeCl3 and HCl dilute solution for 30 minutes, and then place it in N 2 The annealing treatment was performed under atmosphere for 30 minutes, and the anne...

Embodiment 2

[0046] S100: Carbonize corncobs at 400°C for 15 minutes, then carbonize them at 1200°C for 15 minutes and cool them out of the oven to obtain corncob activated carbon; cut bamboo into sections and carbonize them at 450°C for 15 minutes, then carbonize them at 1200°C for 25 minutes Take it out of the oven and cool to get bamboo activated carbon, mix the corncob activated carbon and bamboo activated carbon in a mass ratio of 1:1, and then crush it to a fineness of 1200 mesh to obtain plant activated carbon with a carbonized iodine value of 1500, an ash content of 6 and a moisture content of <3 filler.

[0047] S200: Fully stir and mix the above-mentioned plant activated carbon filler and the solid electrolyte at a ratio of 1:1 to obtain a mixed filler.

[0048] S300: Put the high-purity copper mesh in 5% FeCl 3 and HCl dilute solution for 30 minutes, then placed in N 2 / He was annealed in a 1:1 mixed atmosphere for 50 minutes, and the annealing temperature was 800°C.

[0049]...

Embodiment 3

[0053] S100: Carbonize corncobs at 400°C for 15 minutes, then carbonize them at 1200°C for 15 minutes and cool them out of the oven to obtain corncob activated carbon; carbonize corn stalks at 350°C for 10 minutes, then carbonize them at 1000°C for 17 minutes and leave them out of the oven for cooling Obtain corncob activated carbon; carbonize bamboo at 450°C for 15 minutes after cutting into sections, and then carbonize at 1200°C for 25 minutes to obtain bamboo activated carbon. : The mass ratio of 1:2 is mixed and crushed to a fineness of 2000 mesh to obtain a plant activated carbon filler with an iodine carbide value of 1000, an ash content of 16 and a moisture content of <3.

[0054] S200: Fully stir and mix the above-mentioned plant activated carbon filler and the solid electrolyte at a ratio of 1:3 to obtain a mixed filler.

[0055] S300: Put the high-purity copper mesh in 5% FeCl 3 and HCl dilute solution for 10 minutes, then placed in Ar / H 2 The annealing treatment w...

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Abstract

The invention discloses a high-purity copper-based battery based on plant activated carbon and a preparation method thereof. The high-purity copper-based battery based on the plant activated carbon includes a high-purity copper mesh, a plant activated carbon filler, an electrolyte, a diaphragm, a negative electrode sheet, and a shell; the high-purity copper mesh is distributed with mesh openings;the plant activated carbon filler is mixed with the electrolyte and tightly filled in the mesh openings of the high-purity copper mesh as a positive electrode sheet; the diaphragm is disposed betweenthe negative electrode sheet and the positive electrode sheet; the end faces of the negative electrode sheet and the positive electrode sheet are provided with electrode ears; and the electrolyte is filled in the gaps among the negative electrode sheet, the positive electrode sheet and the diaphragm in the shell. The preparation method of the high-purity copper-based battery based on the plant activated carbon comprises the steps of preparation of the plant activated carbon filler, filler mixing, mesh filling and assembly. According to the invention, the high-purity copper mesh is filled withthe plant activated carbon, and a larger surface area of the activated carbon is used for capturing more ions, therefore, the battery power is increased, and the battery performance is improved; and the high-purity copper-based battery based on the plant activated carbon has the characteristics of low cost, environmental protection, high performance capacity, high conductivity, high rate, and canmeet various requirements of charge and discharge.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and specifically relates to a high-purity copper-based plant-based activated carbon that is low in cost, environmentally friendly, high in capacity, high in conductivity, high in rate, and capable of meeting various requirements for charging and discharging. Batteries and methods of making them. Background technique [0002] A battery is a device for energy conversion and storage. It consists of two electrochemically active electrodes with different components. The positive and negative electrodes are respectively immersed in the electrolyte that can provide media conduction. "A certain electromotive force is generated between them; when connected to an external carrier, it provides electrical energy by converting its internal chemical energy. [0003] Regardless of whether it is a lithium-ion battery, a traditional alkaline battery, or the current environmentally friendly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04H01M4/36H01M4/587H01M4/66H01M4/74H01M10/04
CPCY02E60/10Y02P70/50
Inventor 凌飞
Owner 凌飞
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