PTFE Membrance For Special Chemist Batteries

1.Excellent chemical stability: PTFE almost does not react with most chemical substances, strong acid, strong alkali and a variety of organic solvents have a strong tolerance, can maintain stability in the corrosive chemical environment existing in special chemical batteries, effectively prevent the diaphragm from being damaged by corrosion, thus ensuring the normal operation of the battery and long service life.

2. Good heat resistance: it can maintain stable performance in a wide temperature range, generally can be used for a long time in the temperature range of -200 ° C to 260 ° C, and can still work stably under high temperature conditions that may occur during special chemical battery operation or charging, maintain the electrochemical balance inside the battery, and ensure the safety and stability of the battery.

3. Excellent mechanical properties: with high tensile strength, impact strength and wear resistance, it can withstand the pressure and stress inside the battery, and maintain the integrity and shape stability of the diaphragm during the battery charging and discharging cycle to prevent the battery performance decline or failure due to mechanical deformation.

4. Low friction coefficient: PTFE friction coefficient is very low, the surface is very smooth, in the battery can reduce the resistance of ion migration, so that the battery charge and discharge efficiency is higher, but also help to reduce the wear between the diaphragm and the electrode, extend the service life of the diaphragm and electrode, and then improve the overall performance of the battery.

1. Extend the life of the electrode: in the alkaline battery, the addition of PTFE insulation tape can reduce the displacement of the active material particles of the zinc electrode and greatly extend the service life of the zinc electrode.

2. Prevent catalyst flooding: In lead-acid batteries, when auxiliary electrodes or catalytic balls are used to eliminate the internal gas, the PTFE sealing film can maintain the hydrophobicity of the catalyst in a strong acid environment for a long time to prevent it from being submerged by acid.

3. Enhance plate performance: Add PTFE emulsion to the tubular positive plate of the lead-acid battery, which can make the active substance more firm, withstand strong impact, and have little impact on its electrical performance.

4. Used as a battery diaphragm: PTFE membrane has good chemical stability, mechanical properties and permeability, etc., can be used as a diaphragm of special chemical batteries such as lithium-ion batteries to prevent short circuit of positive and negative electrodes, control the movement of electrolyte and water, and ensure the normal operation and safety of the battery.

5. Solid state battery binder: PTFE can be used as a binder for the solid state lithium battery dry process electrode, and the three-dimensional "network" structure formed by its fibrosis can fix the electrode powder, so that the battery performance is stable.

1. What is the specific role of its hydrophobicity in the battery?
In a battery, hydrophobicity prevents water from accumulating on the surface of the diaphragm. If there is too much water, it may dilute the electrolyte, change the chemical environment inside the battery, and affect the performance of the battery. The hydrophobicity of PTFE film can ensure a stable electrolyte concentration and maintain the normal charging and discharging process of the battery.

2. How does the permeability of PTFE film affect the battery performance?
Moderate permeability can allow the gas generated inside the battery (such as hydrogen, oxygen) to discharge to a certain extent, to avoid gas accumulation resulting in high internal pressure of the battery and damage to the battery. At the same time, the exchange of gases also helps to maintain the balance of chemicals inside the battery and ensure the continuous progress of the battery reaction.

3. What are the specific applications of PTFE film in solid-state batteries?
A: In solid-state batteries, PTFE can be used as a binder. The three-dimensional "network" structure formed by its fibrosis can fix the electrode powder well and ensure the stability of the electrode. This structure helps to improve the performance of solid-state batteries, such as enhancing the battery cycle life and charging and discharging efficiency.

4. How to maintain the battery with PTFE membrane?
During use, it is necessary to avoid overcharging or over-discharging the battery, as this may have an impact on the performance of the PTFE film. At the same time, pay attention to the working environment temperature of the battery, try to avoid using the battery outside the temperature range of the film, regularly check the electrolyte level of the battery and the appearance of the battery to ensure that the PTFE film works normally.

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