Ternary Sulfur/Polyacrylonitrile/SiO₂ Composite Cathodes for High-Performance Sulfur/Lithium Ion Full Batteries

• Published in: Polymers Vol. 10; no. 8; p. 930
• Main Authors: He, Yusen, Shan, Zhenzhen, Tan, Taizhe, Chen, Zhihong, Zhang, Yongguang
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 20.08.2018; MDPI
• Subjects: Additives; Anodes; Carbon; Cathodes; electrochemical performance; Electrodes; Electrolytes; Energy; Fourier transforms; Graphite; Lithium; Lithium ions; Metal powders; Microscopy; Morphology; Polyacrylonitrile; prelithiated graphite anode; Rechargeable batteries; Scanning electron microscopy; Silicon dioxide; Spectrum analysis; stabilized lithium metal powder; Sulfur; sulfur/lithium-ion full battery; ternary sulfur/polyacrylonitrile/SiO2 composite; Transmission electron microscopy; United States > US; China; Germany; ternary sulfur/polyacrylonitrile/SiO2 composite; sulfur/lithium-ion full battery; prelithiated graphite anode; stabilized lithium metal powder; electrochemical performance
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym10080930

In the present study, a novel sulfur/lithium-ion full battery was assembled while using ternary sulfur/polyacrylonitrile/SiO₂ (S/PAN/SiO₂) composite as the cathode and prelithiated graphite as the anode. For anode, Stabilized Lithium Metal Powder (SLMP) was successfully transformed into lithiated graphite anode. For cathode, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that SiO₂ was uniformly distributed on S/PAN composites, where SiO₂ served as an effective additive due to its ultra high absorb ability and enhanced ability in trapping soluble polysulfide. The tested half-cell based on S/PAN/SiO₂ composite revealed high discharge capacity of 1106 mAh g after 100 cycles at 0.2 C. The full cell based on prelithiated graphite//S/PAN/SiO₂ composite system delivered a specific capacity of 810 mAh g over 100 cycles.