What are the disadvantages of lithium iron phosphate batteries?photovoltaic energy storage battery sales

　　stability. During the sintering process of lithium iron phosphate, iron oxide has the possibility of being restored to a single iron in a high -temperature reduction atmosphere. Single -quality iron will cause a slight short circuit in the battery, which is the most taboo substance in the battery. This is also the main reason why Japan has not regarded the material as a dynamic lithium -ion battery positive electrode material.

　　Performance defects. Lithium iron phosphate has some performance defects, such as low vibration density and compact density, resulting in low energy density of lithium -ion batteries. The low temperature performance is poor, and this problem has not been solved even if it nano -nanoclastic and carbon coverage. Dr. Don Hillebrand, director of the Agan National Laboratory Energy Storage System Center in the United States, said that when talking about the low temperature performance of lithium iron phosphate batteries, he used Terrible to describe the test results of the teste of lithium iron phosphate lithium -type lithium ion batteries that showed that the lithium iron phosphate battery was at low temperature Under (below 0 ° C) cannot drive electric vehicles. Although some manufacturers claim that the capacity maintenance rate of lithium iron phosphate iron batteries is not bad at low temperature, it is under the condition of smaller discharge current and low discharge intercept voltage. In this case, the equipment cannot start the work at all.

　　high cost. The preparation cost of materials is higher and the manufacturing cost of batteries is high, the battery rate is low, and the consistency is poor. Although the nanogenicization and carbon coverage of lithium iron phosphate has improved the electrochemical properties of the material, it also brings other problems, such as reduced energy density, improvement of synthetic costs, poor electrode processing performance, and harsh environmental requirements. Although the chemical elements in lithium iron phosphate Li, Fe and P are rich in and the cost is also low, the cost of lithium iron phosphate products prepared is not low. Even if the cost of the early period is removed, the cost of this material is high The cost of preparing batteries will make the cost of energy storage power in the final unit higher.

　　Product consistency is poor. At present, no iron phosphate material factory in China can solve this problem. From the perspective of material preparation, the synthesis reaction of lithium iron phosphate is a complex multi -phase reaction, including solid -phase phosphate, iron oxides, and lithium salt, carbon front -drive body and reducing gas phase. In this complex response process, it is difficult to ensure the consistency of the reaction.

　　Intellectual property issues. At present, the basic patent of lithium iron phosphate is owned by the University of Texas, and the carbon coated patent is applied by Canadians. These two basic patents cannot be bypassed. If the patent use fee is calculated in the cost, the product cost will be further increased. In addition, from the experience of R & D and production of lithium -ion batteries, Japan is the earliest commercialized country in lithium -ion batteries, and has always occupied the high -end lithium -ion battery market. Although the United States is leading in some basic research, there is no large -scale lithium -ion battery manufacturer so far.

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