Biotene: Earth-Abundant 2D Material as Sustainable Anode for Li/Na-Ion Battery
Atin Pramanik, Preeti Lata Mahapatra, Raphael M. Tromer, Jianan Xu, Gelu Costin, Chenxi Li, Sreehari K. Saju, Salma Alhashim, Kavita Pandey, Anchal Srivastava, Róbert Vajtai, Douglas S. Galvão, Chandra Sekhar Tiwary, Pulickel M. Ajayan
Abstract
Natural ores are abundant, cost-effective, and environmentally friendly. Ultrathin (2D) layers of a naturally abundant van der Waals mineral, Biotite, have been prepared in bulk via exfoliation. We report here that this 2D Biotene material has shown extraordinary Li–Na-ion battery anode properties with ultralong cycling stability. Biotene shows 302 and 141 mAh g –1 first cycle-specific charge capacity for Li- and Na-ion battery applications with ∼90% initial Coulombic efficiency. The electrode exhibits significantly extended cycling stability with ∼75% capacity retention after 4000 cycles even at higher current densities (500–2000 mA g –1 ). Further, density functional theory studies show the possible Li intercalation mechanism between the 2D Biotene layers. Our work brings new directions toward designing the next generation of metal-ion battery anodes.