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PANI/Go/PAN nanofiber membrane composite potassium air battery negative electrode and preparation method thereof

A nanofiber membrane and air battery technology, applied in battery electrodes, fuel cell half-cells, primary battery half-cells, circuits, etc., can solve negative electrode corrosion failure, easy chemical reaction, discharge termination of potassium-air battery And other issues

Active Publication Date: 2019-09-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the working process of the potassium-air battery, the metal potassium negative electrode is prone to chemical reactions with oxygen or water, forming potassium dendrites, causing corrosion failure of the negative electrode, and finally leading to the discharge termination of the potassium-air battery.

Method used

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  • PANI/Go/PAN nanofiber membrane composite potassium air battery negative electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of spinning solution

[0027] Add 0.6g polyacrylonitrile (PAN) to the mixed solvent of 1g chloroform and 6.5g N,N-dimethylformamide (DMF), stir at room temperature for 2h to obtain a uniform colloidal liquid, mix 0.1800g aniline and 0.216g After camphorsulfonic acid was added to the colloidal liquid and stirred at room temperature for 2 hours, 0.45 g of ammonium persulfate was added and stirred at room temperature for 30 minutes. into the above solution, and stirred at room temperature for 12 hours to obtain a spinning solution;

[0028] (2) Preparation of PGP film

[0029] A 1mL plastic spray gun head cover is used in a 5mL syringe, and 3mL of spinning solution is injected into the syringe. The receiving device is a wire mesh placed horizontally for electrospinning. The electrospinning parameters are: the spinning voltage is 6kV, and the plastic spray gun The distance between the needle tip and the wire mesh is 12cm, the ambient temperature is 20°C-28...

Embodiment 2

[0035] (1) Preparation of spinning solution

[0036] Add 0.6g polyacrylonitrile (PAN) to the mixed solvent of 1g chloroform and 6.5g N,N-dimethylformamide (DMF), stir at room temperature for 3h to obtain a uniform colloidal liquid, mix 0.1800g aniline and 0.216g After camphorsulfonic acid was added to the colloidal liquid and stirred at room temperature for 3 hours, 0.45 g of ammonium persulfate was added and stirred at room temperature for 60 minutes. into the above solution, and stirred at room temperature for 18 hours to obtain a spinning solution;

[0037] (2) Preparation of PGP film

[0038] A 1mL plastic spray gun head cover is used in a 5mL syringe, and 3mL of spinning solution is injected into the syringe. The receiving device is a wire mesh placed horizontally for electrospinning. The electrospinning parameters are: the spinning voltage is 8kV, and the plastic spray gun The distance between the needle tip and the wire mesh is 10cm, the ambient temperature is 20°C-28...

Embodiment 3

[0044] (1) Preparation of spinning solution

[0045]Add 0.6g polyacrylonitrile (PAN) to the mixed solvent of 1g chloroform and 6.5g N,N-dimethylformamide (DMF), stir at room temperature for 4h to obtain a uniform colloidal liquid, mix 0.1800g aniline and 0.216g After camphorsulfonic acid was added to the colloidal liquid and stirred at room temperature for 4 hours, 0.45 g of ammonium persulfate was added and stirred at room temperature for 60 minutes. into the above solution, and stirred at room temperature for 24 hours to obtain a spinning solution;

[0046] (2) Preparation of PGP film

[0047] A 1mL plastic spray gun head cover is used in a 5mL syringe, and 3mL of spinning solution is injected into the syringe. The receiving device is a wire mesh placed horizontally for electrospinning. The electrospinning parameters are: the spinning voltage is 10kV, and the plastic spray gun The distance between the needle tip and the wire mesh is 18cm, the ambient temperature is 20°C-28...

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Abstract

The invention relates to a PANI / Go / PAN nanofiber membrane composite potassium air battery negative electrode and a preparation method thereof, and the potassium air battery negative electrode is prepared by pressing a porous potassium sheet into an electrode sheet, coating the surface of the electrode sheet with a PANI / Go / PAN nanofiber membrane, and mechanically pressing the electrode sheet into the potassium air battery negative electrode. The preparation method comprises the following steps: adding polyacrylonitrile into a solvent to obtain a colloidal solution, adding aniline and camphorsulfonic acid into the colloidal solution, stirring, adding ammonium persulfate, refrigerating, adding graphene oxide to obtain a spinning solution, and carrying out electrostatic spinning to obtain a nanofiber membrane; pressing a punctured metal potassium sheet and a current collector nickel net into an electrode sheet, coating the surface of the electrode sheet with the nanofiber membrane, and pressing to obtain the potassium air battery negative electrode. The negative electrode has the advantages that formation of potassium dendrites can be inhibited; corrosion and invalidation of the negative electrode can be slow down; and the negative electrode can be applied to a potassium air battery, thereby improving the performance of the potassium air battery and prolonging the cycle life of the potassium air battery.

Description

technical field [0001] The invention relates to a PANI / Go / PAN nanofiber membrane composite potassium-air battery negative electrode and a preparation method thereof. Background technique [0002] A potassium-air battery is a battery that uses potassium metal as the negative electrode and oxygen provided in the air as the positive electrode reactant. During the discharge process of the potassium-air battery, the potassium metal negative electrode releases electrons and becomes potassium ions. The potassium ions pass through the electrolyte, combine with oxygen at the positive electrode, and electrons flowing from the external circuit to form potassium oxide or potassium peroxide, and stay at the positive electrode. . Charging process: electrons are supplied through the wire, potassium ions pass through the organic electrolyte to the surface of the negative electrode, react on the surface of the negative electrode to form potassium metal, react on the positive side to generat...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M12/06
CPCH01M12/06H01M4/86H01M4/88Y02E60/10
Inventor 王家钧蔡克迪奚雪姜雯郎笑石
Owner HARBIN INST OF TECH
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