Bam! In July 2021 the largest Chinese manufacturer of lithium-ion batteries CATL ("Contemporary Amperex Technology Co. Limited") unveiled its latest breakthrough technology by releasing its first generation of sodium-ion batteries (SIBs).

Based on a series of innovations in the chemistry system, CATL’s first generation of SIBs has the advantages of comparatively high-energy density, fast-charging capability, great low-temperature performance and high-integration efficiency, among others.

The energy density of CATL’s SIB cell can supposedly achieve up to 160Wh/kg, and the battery can charge in 15 minutes to 80% at room temperature. Moreover, in a low-temperature environment of -20°C, the sodium-ion battery has a capacity retention rate of more than 90%, and its system integration efficiency can reach more than 80%. These are impressive results when comparing to nowadays lithium-ion battery performance numbers.

We asked our guest Prof. Dr. Stefano Passerini to take a stand regarding the latest research findings on SIBs. What are the main differences concerning the abundance of the used materials, sustainability, recycling, price, energy density and safety issues.

https://www.hiu-batteries.de/en/