Activated biocarbon from peanut shell as cathode for Lithium-Sulfur Batteries

MARIA LUZ NIEVA; OSVALDO CAMARA; MARIA LAURA PARA; MARIA DEL CARMEN ROJAS; GUILLERMINA LUQUE; LAURA MOYANO

Conferencia; 2020 Express Conference on the Physics of Materials and its applications in Energy and Environment; 2020

Low-value, abundant and sustainable biomass materials for high-value energy storage application are important for energy storage invehicle electrification and for intermittent renewable energy sources. Among next generation energy storage batteries, we can find lithiumsulfur that has a high theoretical specific capacity and high energy density. In the present work we propose the use of biocarbons derived from pyrolysis of treated and untreated peanut shells (PS) as materials for lithium-sulfur cathodes. Different biocarbons were obtained at lowtemperature pyrolysis changing the synthesis by acid or basic pre-treatment and the effect of these in the physical characteristic, and in their performance as cathodes in lithium-sulfur batteries were studied. We found that the treatment changes the type of porous generated and their electrochemical performance. The best electrode material was obtained from acid-treated peanut shells. This works allows obtaining anefficient electrode giving great added values to bio-waste materials.