聚阴离子正极钠电池有什么特点？

What are the characteristics of Sodium-ion Battery with polyanion cathode?    

聚阴离子正极钠电池是安全性最高、循环寿命最长、稳定性最好的钠电池技术体系，主打超长时储能、备用电源、工业长效场景。该材料的晶体结构刚性极强，钠离子嵌脱过程中几乎不会发生结构形变，抗衰减、抗老化、抗热失控能力拉满，循环寿命可达6000次以上，远超其他两类体系，极端工况下安全稳定性极佳。同时其短板也十分明显，材料本身的储钠空间有限，电池能量密度偏低，同等体积和重量下储电量更少，无法适配对续航、能量密度有要求的动力场景，仅适合对寿命、安全、稳定性要求极高的纯储能场景。

Polyanion cathode Sodium-ion Battery is the sodium battery technology system with the highest safety, the longest cycle life and the best stability, focusing on ultra-long-term energy storage, backup power supply, industrial long-term scenarios. The crystal structure of this material is extremely rigid, and there is almost no structural deformation during the intercalation and deintercalation of sodium ions. The anti-attenuation, anti-aging and thermal runaway resistance are full, and the cycle life can reach more than 6000 times, far exceeding the other two systems, and the safety and stability under extreme working conditions are excellent. At the same time, its shortcomings are also very obvious: the material itself has limited sodium storage space, the battery energy density is relatively low, and the power storage per unit volume and weight is less, which cannot adapt to the power scenarios with requirements for battery life and energy density, and is only suitable for pure energy storage scenarios with extremely high requirements for life, safety and stability.