What are the disadvantages of lithium iron phosphate

1. Intellectual property issues. The earlier patent application for lithium iron phosphate was obtained by FXMITTERMAIERu0026SOEHNEOHG (DE) on June 25, 1993, and the result of the application was announced on August 19 of the same year. The basic patent for lithium iron phosphate is owned by the University of Texas, while the carbon coating patent is applied for by Canadians. These two basic patents cannot be bypassed. If royalties are included in the cost, the cost of the product will be further increased. 2. Poor product consistency. At present, there is no lithium iron phosphate material factory in China that can solve this problem. From the perspective of material preparation, the synthesis reaction of lithium iron phosphate is a complex multiphase reaction, including solid-phase phosphate, iron oxide and lithium salt, plus carbon precursor and reducing gas phase. In this complex reaction process, it is difficult to ensure the consistency of the reaction. 3. The preparation cost of materials and the manufacturing cost of the battery are relatively high, the battery yield rate is low, and the consistency is poor. Although the nanometerization and carbon coating of lithium iron phosphate improve the electrochemical performance of the material, it also brings other problems, such as a reduction in energy density, an increase in synthesis cost, poor electrode processing performance, and harsh environmental requirements. Although the chemical elements Li, Fe and P in lithium iron phosphate are abundant, and the cost is low, the cost of the prepared lithium iron phosphate product is not low. Even if the previous research and development costs are removed, the process cost of the material is higher. The cost of preparing the battery will make the cost of the final unit of energy storage electricity higher. 4. Poor conductivity. This question is its key question. The reason why lithium iron phosphate has not been widely used so late is an important issue. However, this problem can now be solved: adding C or other conductive agents. The laboratory reports that it can reach a specific capacity above 160mAh/g. The lithium iron phosphate material produced by our company has been added with conductive agent during the production process, do not add it when making batteries. In fact, the material should be: LiFePO4/C, such a composite material. 5. The tap density is low. Generally, it can only reach 1.3-1.5g/ml, and the low tap density can be said to be a major disadvantage of lithium iron phosphate. This shortcoming determines that it has no advantage in small batteries such as mobile phone batteries. Even though it has low cost, good safety performance, good stability, and high cycle times, if the volume is too large, it can only replace lithium cobalt oxide in a small amount. This shortcoming will not be prominent in power lithium batteries. Therefore, lithium iron phosphate is mainly used to make power lithium batteries. 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. Previous: What are the precautions for charging electric vehicle batteries in summer?