Chemically grown 3D copper hydroxide electrodes with different morphologies for high-performance asymmetric supercapacitors

摘要

Present study investigated decoration of Cu(OH)2with different morphologies by copper precursors, on 3D nickel foam. The Cu(OH)2-A (nano flower)electrode showed an excellent capacitance of 1332Fg?1at current density of 2Ag?1compared to the Cu(OH)2-C (nano ribbon, 1100Fg?1) and Cu(OH)2-S (nano long leaf, 1013Fg?1) electrodes. Asymmetric supercapacitor (ASC) was fabricated, and showed maximum capacitance of 165Fg?1at current density of 2Ag?1with high energy density of 66.7Whkg?1and power density of 5698Wkg?1with excellent stability of 80% after 10,000 cycles.