Pyrolytic carbons derived from peanut shells and sunflower husk for Lithium Sulfur Batteries

M.L. PARA; M.L. NIEVA; M.C. ROJAS; L. MOYANO; O. CAMARA; E. LEIVA; D. BARRACO; G. LUQUE

Bologna

Congreso; 69 Th Annual Meeting of the international Society of Electrochemistry; 2018

The Li-S battery technology offers a higher capacity than Li-ionbatteries, however, it has some drawbacks such as volume change duringcycling and incomplete reduction of S to LiS, forming polysulphides (PS)known as shuttle effect, which lead to a decrease in coulombic efficiency, 2in addition to the low conductivity of S. To solve some of these problems, biocarbon obtained from peanut shell was used as cathode for Li-S batteries. This novel use of biomaterial adds an important value to the waste of the agricultural industry.The aim of this work is to use pyrolyzed biocarbons as active material for Li-S cathodes, taking advantage of its porous structure, to control the volume change and the shuttle effect. Additionally, two different treatments were tested to improve these active materials.