Lithium-ion batteries are recognized internationally as ideal chemical energy sources. They have the advantages of small size, large capacitance, and high voltage. They are widely used in mobile phones, laptops and other electronic products. The ever-increasing electric vehicle industry will bring lithium-ion batteries. Greater development space
 
China and major developed countries in the world have introduced many policies to support new energy vehicles
 
The development plans of seven strategic emerging industries such as new energy vehicles will further promote China's electric vehicles from the policy level. In 2009, the global production of lithium-ion batteries was approximately 3.05 billion, with a total battery capacity of approximately 15,000 MWh. In recent years, major global auto manufacturers have launched various types of electric vehicles. In 2013, the lithium battery capacity of electric vehicles reached 14,000 MWh, which is equivalent to 93% of the world's small-sized lithium battery capacity in 2009; and the lithium battery capacity of electric vehicles reached 45,000 MWh in 2018. In 2009, the global capacity of small lithium batteries was nearly 3 times. The difficulty of lithium iron phosphate is mainly concentrated in product consistency, low temperature performance, etc.
 
In addition, the two core technology patents apply carbon and carbon heat reduction cannot avoid
 
Lithium manganate has a long research time and is the most mature and reliable power battery cathode material at present, and it has no patent restrictions. From the current selection of mainstream automobile manufacturers in the world, it can be seen that manganese and ternary systems are the first choice. At present, the domestic high-end separators mainly rely on imports, and the domestic technology level is still low
 
From the aspects of conductivity, thermal stability and oxidation resistance, Lithium hexafluorophosphate is the best electrolyte material. At present, China's high-grade electrolyte is almost entirely imported. The gross interest rate of lithium hexafluorophosphate is more than 60%. Other additives focus on PVDF, NMP, DOP. At present, polyvinylidene fluoride (PVDF) is widely used in the industry as a binder for lithium ion batteries, N-methylpyrrolidone (NMP) as a dispersant, and DOP as a plasticizer.