A potassium-air battery comprising a polyaniline-carbon nanotube-tin dioxide-polyacrylonitrile composite nanofiber separator

Abstract

A polyaniline-carbon nanotube-tin dioxide-polyacrylonitrile composite diaphragm potassium air battery, comprising a battery negative electrode, a first diaphragm, an electrolyte, a second micro-diaphragm, a battery positive electrode, an argon chamber and an air chamber, A PCSP composite nanofiber diaphragm is arranged on the side of the first diaphragm close to the electrolyte; the preparation steps are: adding polyacrylonitrile to the solvent, stirring to obtain a colloidal solution, adding aniline and camphorsulfonic acid to the colloidal solution, After stirring, add ammonium persulfate and stir, put the solution into a refrigerator freezer at 5°C for refrigeration, and then dissolve carbon nanotubes and tin oxide in the solution left standing in the freezer to obtain a spinning solution, which is prepared by electrospinning. PCSP composite nanofiber separator. The advantage is that the potassium-air battery can selectively penetrate potassium ions in the electrolyte, inhibit the penetration of other ions, water and oxygen to the negative electrode side, thereby slowing down the corrosion and failure of the negative electrode, thereby improving the discharge capacity and cycle performance of the potassium-air battery.

Description

technical field [0001] The invention relates to a polyaniline-carbon nanotube-tin oxide-polyacrylonitrile (PCSP) composite diaphragm potassium-air battery. Background technique [0002] A potassium-air battery is a battery that uses potassium metal as the anode and oxygen provided in the air as the cathode reactant. During the discharge process of the potassium-air battery, the potassium metal anode releases electrons and becomes potassium ions. The potassium ions pass through the electrolyte and combine with oxygen and electrons from the external circuit at the cathode to form potassium oxide or potassium peroxide, which remains at the cathode. . Charging process: Electrons are supplied through the wire, potassium ions pass through the organic electrolyte to the surface of the anode, react on the surface of the anode to generate potassium metal, and the cathode side reacts to generate oxygen, and the generated electrons are supplied to the wire. However, during the workin...

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Problems solved by technology

However, during the working process of the potassium-air battery, the metal potassium anode is prone to chemical reactions when it encounters oxygen or water, causing the corrosion of the anode to fail, and eventually leading to the termination of the discharge of the potassium-air battery.

[0003] Carbon nanotubes (CNTs) are promising as graphite materials for lithium-ion batteries due to their uniform one-dimensional tubular structure, large specific surface area, and nanoscale hollow channels. large, difficult to use

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