SiAT and CSAC Reveal Breakthrough Test Results for CNT-Coated Aluminum Foil at Battery Show Detroit

SiAT, a leading Taiwanese manufacturer of advanced nanomaterials for batteries, and CSAC, the largest Taiwanese aluminum producer, have revealed promising test results for their jointly developed CNT-coated aluminum foil (CCAF) during a speaker session at the Battery Show Detroit on October 8.

Launched in February, the CCAF is designed to meet the growing demand for faster charging and longer lifespan in lithium-ion and sodium-ion batteries, as well as supercapacitors. The carbon nanotube (CNT) coating enhances conductivity and reduces interface contact resistance, which is crucial for high-rate discharge batteries. The CCAF technology increases LFP battery energy density from 625 Wh/L to 700 Wh/L, while also extending battery cycle life. In sodium batteries, CCAF use improves cycle life by 20%.

The CNT coating also addresses the issue of electrolyte corrosion, particularly with newer LiFSI additives used in next-generation batteries. Data from Electrochemical Corrosion CV and SEM analyses have demonstrated the CNT coating's protective effect against LiFSI electrolyte corrosion, further extending battery lifespan.

SiAT’s CCAF uses CSAC’s aluminum foil for batteries (model CSM2403), produced in Taiwan. CSAC is one of the few manufacturers with end-to-end production capabilities, from aluminum ingot to finished foil. This ensures that the CCAF complies with the Inflation Reduction Act (IRA) and is exempt from tariffs imposed by the U.S., Canada, and Europe on batteries and aluminum imported from China.