High-stable α-phase NiCo double hydroxide microspheres via microwave synthesis for supercapacitor electrode materials

The 3D flower-like α-phase NiCo DH microsphere synthesized by microwave heating displayed excellent stability. The capacitance increased to 1220Fg−1 after 2000 cycles at 10Ag−1 (122.5% of its initial value of 996Fg−1) and still remained a high capacitance of 822Fg−1 (93.8% retention) after another 1000 cycles at 30Ag−1.