A barrier to ensure battery safety
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2023/11/17 14:10:18
Diaphragm A barrier that separates the cathode from the anode
The separator is a thin insulating film that has the following characteristics:
1) Separate the positive and negative electrodes to prevent them from touching inside the battery;
2) It has submicron pores as a channel between the positive and negative electrodes for lithium ions;
3) At high temperatures, the pores on the surface of the diaphragm will be blocked, resulting in lithium ions unable to move, thereby avoiding short circuit;
4) With high mechanical strength, it can prevent by-products or foreign bodies from entering, and ensure the safety of the battery.
What are the conditions for a good diaphragm?
A good diaphragm needs to meet the following requirements:
1) Has electrochemical stability and high insulation to prevent adverse reactions with ions in the battery;
2) Have pores of the same size so that lithium ions can move smoothly;
3) It can close the pores and prevent the movement of ions at high temperatures to ensure safety;
4) Thin and with high mechanical strength to improve energy density and ensure the durability and safety of the diaphragm. These requirements ensure that the diaphragm plays an effective separation and protection role in the battery.
Diaphragm is a key line of defense for battery safety, and choosing a high-quality diaphragm is crucial to ensure battery safety.
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