Electrodeposited Nickel Hydroxide On Nickel Foam With Ultrahigh Capacitance

摘要

Electrodeposited Ni(OH)_2 on nickel foam with porous and 3D nanostructures has ultrahigh capacitance in the potential range -0.05-0.45 V, and a maximum specific capacitance as high as 3152 F g ~(-1) can be achieved in 3% KOH solution at a charge/discharge current density of 4 A g~(-1).rnElectrochemical capacitors (ECs), also called supercapacitors or ultracapacitors, have raised considerable attention over the past decade because of their higher power density and longer cycle life than secondary batteries and their higher energy density compared to conventional electrical double-layer capacitors.