New research finds hard carbon in rice hull ash

Exciting new research reveals that hard carbon found in rice hull ash could serve as an affordable and domestically sourced alternative to graphite in lithium-ion and sodium-ion battery anodes. A detailed examination of ash from burned rice hulls—the robust outer layer of rice grains—unveils a unique form of carbon capable of nearly doubling the energy density of conventional lithium-ion and sodium-ion batteries. This breakthrough opens the door to more efficient and sustainable energy solutions.