Two steps in situ structure fabrication of Ni–Al layered double hydroxide on Ni foam and its electrochemical performance for supercapacitors

Abstract

In this paper, two steps in situ growth method has been used to solve the accumulation of layered double hydroxide (LDH) in oriented growth. Moreover, the petal-like Ni–Al LDH displays excellent pseudocapacitance performance: a specific capacitance of 795 F g−1, a long cycle life with 80% performance remains after 1000 cycles and good charge/discharge stability, owing to the improvement of pseudocapacitive reaction by the large sheet structure of Ni–Al LDH on Ni foam. And the comparison results of different electrode preparation process and different growth process reflect the great advantages of our synthesis method.