"Lithium ion + nano ion" hybrid ion battery

Lithium-ion batteries are now the most versatile chemical power source, and they show a very rapid development trend. However, various lithium-ion batteries have their own defects due to material characteristics. Sodium is easy to enter and exit from multiple directions, making the power flow between the electrodes smoother. Although it faces the problem of practical use such as large-capacity, it gives the impression that sodium is likely to become the protagonist of a new generation of batteries. Scientists from the Institute of Materials Technology and Engineering of the Chinese Academy of Sciences have made a lithium-ion battery with better performance based on the characteristics of lithium and sodium.

Different from the working principle of the traditional "lithium chair type" of lithium ion batteries, during the charging and discharging process, lithium ions and sodium ions move only between one pole of the battery and the electrolyte. This type of battery not only can store electrical energy, but also has the function of separating metal ions, which can be described as "one-shot use". That is to say, in the cooperative movement with the electrolyte, the lithium-sodium ion battery integrates the movement modes of the lithium battery and the sodium ion battery, and is uniformly unified in one battery body.

In theory, lithium and sodium belong to the same family of elements in the periodic table, and they are chemically similar and difficult to separate. Lithium-sodium hybrid ion battery technology can be used to separate lithium and sodium ions while storing and releasing electrical energy. This separation technology is more efficient and greener than other existing chemical methods, and thus has important application prospects in large-scale separation of lithium and sodium elements in sea or brine. The development of lithium-ion batteries, especially power lithium batteries, has led to an increasing demand for lithium resources worldwide. According to statistics, by 2012, 83% of the world's lithium is extracted from sea or brine, so the development of new and effective separation technology is imminent. The emergence of lithium-ion battery has provided new ideas for the development of large-scale power batteries, and provided a new opportunity for the development of lithium-sodium separation technology.

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