A Cost-Effective Supercapacitor Material of Ultrahigh Specific Capacitances: Spinel Nickel Cobaltite Aerogels from an Epoxide-Driven Sol-Gel Process

Nickel cobaltite (NiCo2O4) aerogels, synthesized with a chloride-based epoxide-driven sol-gel process, exhibit ultrahigh specific capacitances (1400 F g(-1); see figure), excellent reversibility, and outstanding cycle stability, at a relatively high mass loading of 0.4 mg cm(-2).