A French research team has made a major advance in rechargeable battery materials, and its reserves are more abundant and cheaper than the currently widely used lithium materials. According to foreign media reports, "18650" lithium batteries are commonly used in notebooks, LED flashlights, and Tesla Model S cars, but researchers at the National Research Center of France have for the first time developed industry-standard 18650 specifications. Sodium ion battery.

Solid-state chemist Jean-Marie Tarascon explained: "The sodium-ion batteries disclosed today are directly inspired by lithium-ion technology." In other words, like lithium ions in a lithium-ion battery, during charging and discharging, sodium ions also move from one electrode to another through the liquid. We also do not need to modify the material during the battery life cycle.

Researchers are currently targeting this particular material for trade secrets, but the performance of prototype batteries has been an eye-opener. LITEN co-investigator Loïc Simonin pointed out: “The energy density can match lithium-iron batteries such as lithium iron phosphate.” Currently, lithium-ion batteries are lighter in weight than sodium-ion materials, but the rarity of this element is also its biggest drawback. In contrast, sodium is very abundant and its content in the earth's crust exceeds 2.6%.

The team hopes to bring inexpensive sodium-ion batteries to all areas of the European market as soon as possible: "Using the 18650 specification allows us to quickly make the concept come true and perform on the same specifications as the existing battery on the market. Compared with the same direction, of course, we will also develop other specifications to meet new requirements."

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