With the advantages of large capacity and low price, al […]
With the advantages of large capacity and low price, alkaline batteries occupy half of the dry battery market. Whether it is a convenience store or a large supermarket, you can see alkaline batteries. However, alkaline batteries have also been criticized for leakage. The electrolyte inside the alkaline battery is strongly alkaline and has a corrosive effect on metals and plastics. Some of the more demanding digital products have begun to abandon alkaline batteries and use liquid-free lithium iron batteries.
Lithium iron batteries are a new generation of dry batteries that have emerged in recent years. They have the characteristics of large capacity, small size, light weight, large current discharge, and excellent low temperature performance. Compared with alkaline batteries, lithium iron batteries are less likely to leak, because the electrolyte is completely adsorbed on the separator, there is no flowing liquid inside the battery, and it will not corrode electronic equipment. It is a boon for some high-end and sophisticated digital products. . For example, the smart door locks of thousands of dollars can be used for half a year to one year due to the durability of the battery. During such a long service period, the probability of leakage of alkaline batteries is very high, and the damage to the smart door locks is not worth the loss, and the use of lithium Iron batteries do not need to worry about the above situation at all.
They are also dry batteries. Why are lithium iron batteries less leaky than alkaline batteries? This is about the materials, processes and structure of lithium iron batteries.
From the material point of view, the electrolyte of the lithium iron battery is an organic solvent containing lithium salts instead of an aqueous solution. Even if the liquid is accidentally leaked, it will not cause corrosion to metals, circuit boards, and plastics. The electrolyte used in alkaline batteries is potassium hydroxide, which is a very alkaline substance that can cause severe corrosion to metals and plastics.
From the process point of view, the separator and positive and negative electrode materials of the lithium iron battery are wound, and the electrolyte is infiltrated on the positive and negative electrode materials and adsorbed in the "roll" of the cell formed by the positive and negative electrodes and the separator. There is no flow in the battery. The electrolyte avoids leakage from the source. Alkaline batteries use a single-layer separator to separate the positive and negative electrodes. The positive electrode material, negative electrode material, and electrolyte are placed separately. The potassium hydroxide electrolyte inside is in a flowing state, and it will leak out after a long time.
From the structural point of view, the sealing of the lithium iron battery adopts a semi-sealed structure, and a sealing ring will be added during the production process. The alkaline battery does not have the above structure.
The following is a summary of the leakage of lithium iron batteries:
The electrolyte on the material uses an organic solvent containing lithium salts instead of an aqueous solution. The electrolyte is adsorbed on the materials of the positive electrode, the negative electrode, and the separator. The sealing ring on the structure is the main reason for the leakage of lithium iron batteries. Worrying about the danger of leakage corrosion and the environmental pollution caused, this is why lithium iron batteries are becoming more and more popular.