US company BioSolar develops 21700 silicon negative electrode battery

Foreign media reported that BioSolar, a US developer of energy storage technology and materials, announced that it has begun producing and testing its second batch of commercial-grade prototype 21700 lithium-ion batteries with the help of its Korean technology partner TopBattery .

Once testing is complete, prototype batteries will be sent to potential manufacturing and development partners for internal qualification testing and analysis.

BioSolar's core focus is to apply its proprietary additive technology to the development of novel silicon-anode lithium-ion batteries, initially developing 21700 lithium-ion batteries for power tool applications.

It is understood that BioSolar is currently preparing two different types of commercial-grade 21700 prototype cells. The first is based on the use of silicon alloy negative electrode materials composed of Si microparticles (Si-MP), and the second is based on the number of pure silicon negative electrode materials Si nanoparticles (Si-NP) used. The main difference between the two is that the size of Si-MP particles is much larger than that of Si-NP.

BioSolar CEO Dr David Lee said: “BioSolar has made significant progress in developing technology to increase battery storage capacity, reduce costs and extend the life of lithium-ion batteries.”

It is worth noting that as battery technology develops and becomes feasible for use in power tools, BioSolar plans to use the knowledge gained from the above battery design and manufacturing to produce the next generation of high-energy, high-power lithium-ion batteries for electric vehicles.

BioSolar has a vision to develop breakthrough energy technologies, and previous successes include the world's first UL-certified bio-based backsheet for solar panels.

Currently, battery companies, material companies and OEMs are actively developing the next generation of lithium battery technology, mainly through the improvement and optimization of the material system. The positive electrode is mainly developing in the direction of high nickel, and has now achieved large-scale mass production and application. The negative electrode is mainly silicon carbide, and its industrialization technology still needs to be broken through.