¿Las baterías de iones de sodio subvertirán las baterías de litio?

Sodium ion batteries have attracted so much attention because sodium ions may replace lithium-ion batteries

In fact, the concept of sodium ion battery started not late. In the 1980s, someone put forward the concept of sodium battery, which started almost at the same time as lithium battery. However, in the 1990s, because the energy density of sodium ion battery was lower than lithium ion battery, it gradually faded out of people's vision. Until the beginning of the 21st century, after the development scale of lithium battery was sound, the research of sodium battery returned to people's vision.

In recent years, the number of published articles related to sodium ion batteries has increased rapidly, and the research related to sodium ion batteries is also in full swing. Companies relying on sodium battery technology are springing up, which shows that the commercialization of sodium ion batteries is approaching.

Lithium has obvious advantages, such as light weight, high energy density and many electrons released. Otherwise, lithium would not be used to mass produce batteries. Lithium ion batteries are becoming more and more important in our life. According to the reserves, the surface content of lithium is 0.0065%, and the surface content of sodium is 2.75%, which is 423 times that of lithium! If the recovery is not considered according to the current development speed of lithium batteries, the development of lithium batteries will be seriously limited by lithium resources in decades. Sodium and lithium are of the same family. As a battery material, it is slightly worse than lithium, but its advantage is that it is cheap and large. In terms of performance, lithium is significantly higher than sodium, but in terms of price and reserves, it is almost completely exploded by sodium. Theoretically, the cost of sodium ion battery can be very low, about 0.2-0.3 yuan / wh, while the cost of lithium ion battery of the same level should be 0.5 yuan / wh. The above is only the theoretical cost. At present, the cost of sodium ion battery may be higher than 0.65 yuan / wh of ternary lithium battery. The main reason is the lack of perfect mass production capacity and supply chain support like lithium battery. There is still a long way to go to reduce the theoretical cost.

Lithium ion battery is an important application market of NMP.

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