Lithium iron phosphate battery five defects

Source: 2020 - 03 - 25 11:53 hits: lithium iron phosphate battery fault 1. In the sintering process of preparation of lithium iron phosphate, iron oxide may be reduced to elemental iron in high temperature and reducing atmosphere. Simple iron will cause the battery short circuit, is the most taboo in battery materials. This is Japan didn't use the material as the main reason of dynamic lithium ion battery cathode material. 2. Lithium iron phosphate has the properties such as low density, vibration compaction density defects, lead to lithium ion battery energy density is low. Low temperature performance is poor, even nanometer carbon coating is not solve the problem. Argonne national laboratory ( 阿贡国家实验室) Center for energy storage system ( 中心的能源存储系统) Tang Xi lai, director of the brand, 汽油) Dr, low temperature performance of lithium iron phosphate battery is very bad. Of lithium ion battery test results show that the lithium iron phosphate battery at low temperature ( Below 0 ℃) Can't drive, the electric car. Although some manufacturers claim that lithium - Iron phosphate battery at low temperature is still keeps its capacity, but this time with low discharge current, discharge cut-off voltage is low. In this case, the equipment can not start. 3. Cost of material preparation and battery manufacturing cost is high, the battery low yield, poor consistency. Although nanocrysization and lithium iron phosphate material of carbon coating can improve the electrochemical performance, they also bring other problems, such as low energy density, the rising cost of synthesis, the poor processing performance of the electrode and harsh demands on the environment. Although the lithium iron phosphate contains abundant chemical element Li, Fe, P, and relatively low cost, but the cost of preparation of lithium iron phosphate products is not low. Even with the previous research and development costs, the technology of the material cost and the preparation of the high cost of batteries, the final unit energy storage costs will be higher. 4. Product consistency. At present, China has not a lithium iron phosphate material factory to solve this problem. From the perspective of material preparation, the synthesis of lithium iron phosphate is a complex multiphase reaction, including solid phosphate, ferric oxide and lithium, carbon precursor and reduction of chi. In the process of the complex reaction, it is difficult to ensure consistency of response. 5. The problem of intellectual property rights. Lithium iron phosphate is one of the earliest patent application by X MITTERMAIER & amp; F SOEHNE OHG ( 德) On June 25, 1993, and in 1993 on August 19, the application results. Lithium iron phosphate patents held by the university of Texas, the basis of the carbon coating by canadians to apply for patent. The two basic patent can't bypass, if the cost includes royalties, the product cost will increase further.