Lithium iron phosphate battery: already mature but not enough

　　Lithium iron phosphate electrode material is currently the safest lithium ion battery cathode material, plus its cycle life of more than 2000 times, standard charging (5-hour rate) use, can reach 2000 times of cycle characteristics, coupled with the price of the technical threshold and technology decline due to the maturity of the industry, so that many manufacturers will use lithium iron phosphate batteries for various factors. It can be said that the rise of new energy vehicles has an inseparable relationship with lithium iron phosphate batteries.

　　However, lithium iron phosphate batteries have a fatal disadvantage, that is, poor low temperature performance, even if it is nano and carbon coating does not solve this problem. Research shows that a battery with a capacity of 3500mAh, if working in an environment of -10 ° C, after less than 100 charge and discharge cycles, the power will sharply decay to 500mAh, basically scrapped. This is not a good thing for the comprehensive national conditions of China's vast territory and indeed more low temperatures in winter.

　　In addition, the preparation cost of the material and the manufacturing cost of the battery is high, the battery yield is low, and the consistency is poor, which is also an important reason for the endurance of many pure electric vehicles and cannot reach the nominal value. Therefore, we can see that there are many new energy vehicles (whether pure electric or hybrid electric), or some relatively cheap new energy vehicles, will choose lithium iron phosphate batteries for different reasons. It can be said that the use of lithium iron phosphate batteries plays an indelible role in laying the foundation for the mass production and promotion of new energy vehicles.

　　In contrast, ternary polymer lithium batteries do have the characteristics of being better than lithium iron phosphate batteries, but why is its development hindered?

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