What are the classifications of lithium-air batteries?

Classification of lithium-air batteries Overall, lithium-air batteries can be divided into six categories: organic systems, water systems, ionic liquid systems, organic-water double electrolyte systems, all-solid-state systems, and lithium-air-supercapacitor batteries. 1. Water-based lithium-air battery Water-based electrolyte lithium-air battery, the electrolyte is a variety of aqueous solutions with different acidity and alkalinity, in different acidic and alkaline electrolytes, the chemical reactions that occur in the battery are also different. Lithium metal corrodes seriously in water-based electrolytes, and the self-discharge rate is extremely high, which makes the battery cycle and coulombic efficiency very low. 2. Organic lithium-air battery This system uses metal lithium sheet as the negative electrode, oxygen as the positive electrode, polyacrylonitrile (PAN)-based polymer as the electrolyte (solvent PC, EC), the open circuit voltage (OCV) is about 3V, and the specific energy ( Excluding the battery shell) is 250350Wh/kg. This data is relatively high in the current situation, but it is too low compared with the theoretical limit of lithium element. 3. Water-organic two-liquid system lithium-air battery The basic form of water-organic two-liquid system lithium-air battery, the negative metal lithium in the battery is in the organic electrolyte, the positive air electrode side electrolyte is KOH aqueous solution, and the middle is super lithium Ions are separated by a glass membrane. The novelty of this new configuration of lithium-air battery is that there is no need to worry about the problem of the air electrode reaction product in the organic system blocking the electrode micropores. The oxygen in the water phase is reduced to the water-soluble LiOH on the air electrode. 4. All-solid-state lithium-air battery All-solid-state lithium-air battery, the electrolyte in the middle is composed of 3 parts, the middle layer with the largest proportion is a glass ceramic with good water resistance, and two thin layers near the lithium negative electrode and the oxygen positive electrode Different polymer materials. All solid-state lithium-air batteries do not have liquid leakage problems, and their safety is improved. However, the contact between the solid electrolyte and the lithium negative electrode, the air electrode, and the internal solid electrolyte is not as tight as the liquid electrolyte, which may cause the internal resistance of the battery to increase. Big. Compared with organic lithium-air batteries, the structure of the system is also more complicated. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: Why does the lithium battery of electric vehicles appear bulging?