Abstract
Metal hydroxide is a promising electrode material for supercapacitors. And third metal introduction can improve its electrochemical performance. In this paper, the Cr was introducing into NiCo-LDH by one-step hydrothermal method. In addition, the influence of Cr content on the electrochemical performance was investigated. The results show that maximum specific capacitance of 2712 F g−1 with the ratio of Ni: Co: Cr of 1:1:0.05, higher than pure NiCo-LDH of 1676 F g−1. In addition, the assembled NiCoCr-0.05//YP50 supercapacitor devices can reach an energy density of 27.38 Wh kg−1 with a good cycle life.
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