Chemical engineering assistant professors turns eggshells into batteries
"(Phys.org)—Americans consume 76 billion eggs per year, and while some of the eggshell waste is used for fertilizer or dietary supplements, the majority of these eggshells are thrown away. In a new study, researchers at Wayne State University in Detroit have developed a method to recycle eggshells, using them as "chemical reactors" to synthesize sulfur-containing nanorods that can be used as battery electrodes.
The researchers, led by Assistant Professor Da Deng at Wayne State University, have published a paper on the novel approach in a recent issue of the journal Chemistry of Materials.
"A large number of eggs are consumed daily, but the disposal of eggshell waste is still a challenging task," Deng told Phys.org. "We outline an idea of the direct use of waste eggshells (or 'trash') as a unique reaction system (or 'treasure') for the synthesis of 1D nanorod arrays on eggshell membrane protein fibers. We prepared a composite of crystalline Co9S8 nanorod arrays on carbon fibers that demonstrate promising performance in both lithium- and sodium-ion batteries."