Product introduction
The electrolytic separation membrane produced by our company adopts polymer composite technology, which can effectively separate and control the movement of charged particles (usually ions) in various electrochemical processes, and can act as a safe physical barrier in various electrolytic application industries , to promote the selective separation of different components in the electrolyte solution.
Product Features
According to the different electrolytic process environment and service life, the electrolytic separation membrane needs to have the following properties
1. Temperature resistance: no melting at high temperature, small thermal shrinkage and expansion changes, flame retardant, low temperature, no embrittlement, and small shrinkage
2. Chemical resistance: strong acid only, strong base only, or both strong acid and strong base.
3. Mechanical Strength: Rigid and flexible to maintain proper shape, whether used as a separator or a pole pocket.
4. Consistency/weldability: It can be applied to welding methods such as glue with base material, glueless hot pressing or ultrasonic welding.
5. Gas separation performance: Effectively prevent the penetration and mixing of gases generated in different electrode chambers.
6. Liquid separation performance: Effectively prevent direct contact and mixing of liquids of different properties in the anode/electrode chamber.
7. Selectivity of ion passage: Based on the charged nature of the material and the microporous structure, the membrane only allows ions of the targeted nature to pass through and move in one direction.
8. Low resistance: The material has low resistance, low energy consumption and low calorific value.
9. Puncture resistance: prevent dendrite growth from penetrating and causing short circuit of electrodes.
10. Wettability: It can quickly absorb and replenish the consumed electrolyte in time.
11. Performance: long replacement cycle and low cost.
Membrane material type, structure, manufacturing process
It is difficult for a single-material separation membrane to meet the above requirements 100% at the same time, and only special composite membranes can do it.
1) Multilayer heat laminated composite:
Membrane + Support (2 layers), or Membrane + Skeleton + Membrane (3 layers)
2) Single-sided or double-sided composite coating:
Support + single side coating, or frame + double side coating membrane,
The support or frame material must be microporous,
suitable thickness, pore size, porosity, channel shape and structure,
Appropriate WEP, which can resist the pressure difference caused by the liquid level difference in the anode/cathode compartment.
At the same time, the membrane and support/skeleton materials must have similar properties, and both can meet the electrolysis working environment and corresponding requirements.
Product Categories
1.Polymer diaphragm of electrolysis device
2.Battery polymer separator
Applications
1. Fuel cell: It can separate reactive gases such as hydrogen and oxygen, while allowing ion transport, forming a barrier between electrodes to prevent direct contact, and facilitating the movement of ions through the electrolyte.
2. Redox flow battery: It can separate the positive and negative electrolytes while allowing ion transport, enabling charged species to flow between the positive and negative electrodes of the battery, contributing to the overall electrochemical reaction of storing and releasing energy.
3. Chlor-alkali process: helps to separate positively charged sodium ions from negatively charged chloride ions, thereby selectively producing chlorine and sodium hydroxide.
4. Electrodialysis: It can selectively transmit ions according to the charge of ions, and is usually used in seawater desalination and pure water production industries.
5. Electrodeposition and electrorefining: used to separate and control the movement of metal ions, enable the selective deposition of desired metals onto electrodes during electrowinning, or contribute to the purification of metals in electrowinning operations.
