A hybrid supercapacitor based on flower-like Co(OH)2 and urchin-like VN electrode materials

摘要: A series of hybrid electrochemical capacitors were fabricated by using the flower-like cobalt hydroxide (Co(OH)2) and urchin-like vanadium nitride (VN) as positive negative electrode materials, respectively. Both Co(OH)2 VN materials showed excellent performance due to their unique structure fast reversible Faradic reaction characteristics. With different operation voltage window (OVW) negative/positive mass ratios, impact on capacitance supercapacitor was investigated thoroughly, which demonstrated that both ratio OVW played an important role in performance. Furthermore, theoretical modeling performed simulation result found be agreement with experimental for influence supercapacitor. When optimized located, Co(OH)2//VN could cycled reversibly high-voltage region 0–1.6 V delivered a high energy density 22 W h kg−1. Even at large power 15.9 kW kg−1, still possessed desirable specific 9 Such impressive expected highly promising candidate application high-performance storage systems.