Nickel phosphate molecular sieve as electrochemical capacitors material

• Microporous nickel phosphate VSB-5 was employed as a new class of electrochemical capacitors material.
• VSB-5 exhibited a high specific capacitance of ∼2740 F g−1 at a charge and discharge current density of 3 A g−1.
• There was no significant reduction in Coulombic efficiency after 3000 cycles at 30 A g−1.

The nickel phosphate molecular sieve VSB-5 as an electrode material for supercapacitors is investigated by cyclic voltammetry (CV) and chronopotentiometry in alkaline media. The VSB-5 shows high specific capacitance and excellent cycling stability. The specific capacitance of VSB-5 is 2740 F g−1 at a current density of 3 A g−1 and there is no significant reduction in Coulombic efficiency after 3000 cycles at 30 A g−1. In comparison with mesoporous nickel phosphate NiPO, porous nickel hydroxide and mesoporous nickel oxide, this remarkable electrochemical performance of VSB-5 will make nickel phosphate material a promising new electrode material for high performance supercapacitors.