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Carbon–Tungsten Disulfide Composite Bilayer Separator for High-Performance Lithium–Sulfur Batteries
- Ali, Shamshad, Waqas, Muhammad, Jing, Xiaopeng, Chen, Ning, Chen, Dongjiang, Xiong, Jie, He, Weidong
- ACS applied materials & interfaces 2018 v.10 no.46 pp. 39417-39421
- adsorption, batteries, carbon, cost effectiveness, materials science, separators
- A bilayer separator based on cost-effective carbon–tungsten disulfide composite and commercial separators is developed in this work. The C-WS₂ separator reduces the shuttling effect and increases the cycle life of the battery because of the excellent adsorption capability of polar WS₂ to polysulfides. Furthermore, conductive carbon substantially enhances the ionic conductivity of (1 × 10–³ S cm–¹). The cell with the C-WS₂ separator delivers an excellent discharge capacity of 996 mA h g–¹ at 1 C and retained at 416 mA h g–¹ after runs over 1000 cycles with a 0.045% capacity decay per cycle. The work provides insights into high-capacity lithium–sulfur batteries with cost-effectiveness.