Anchoring and Catalytic Effects of rGO Supported VS<sub>2</sub> Nanosheets Enable High‐Performance Li–Organosulfur Battery
Ping Zhang, Yongzhu Fu, Wei Guo
Abstract
Abstract As a high‐energy‐density cathode material, organosulfur has great potential for lithium batteries. However, their practical application is plagued by electronic/ionic insulation and sluggish redox kinetics. Hence, our strategy is to design a self‐weaving, freestanding host material by introducing reduced graphene oxide–supported VS 2 nanosheets (VS 2 ‐rGO) and carbon nanotubes (CNTs) for lithium–phenyl tetrasulfide (Li–PTS) batteries. Unique host materials not only provide physicochemical confinement of active materials to boost the utilization but also catalyze the conversion of active materials to accelerate redox kinetics. Therefore, Li–PTS cell based on the 3D VS 2 ‐rGO‐CNTs (VSGC) host material shows excellent cyclability, with a slow capacity decay rate of 0.08% per cycle over 500 cycles at 0.5 C, and a high areal capacity of 3.1 mAh cm −2 with the PTS loading of 7.2 mg cm −2 . More importantly, the potential for practical applications is highlighted by the flexible pouch cell with a high areal capacity (4.1 mAh cm −2 ) and a low electrolyte/PTS ratio (3.5 µL mg −1 ). This work sheds light on elevating the electrochemical performance of Li–organosulfur batteries through the effective catalytic and adsorbed host material.