Rich-grain-boundary of Ni3Se2 nanowire arrays as multifunctional electrode for electrochemical energy storage and conversion applications

摘要: Controllable nanoarchitecture arrays of the transition metal selenide, supported on conductive substrates, are promising materials for high-performance electrochemical energy storage and conversion applications. Herein, Ni3Se2 nanowire with a rich-grain-boundary rationally grown nickel foam (NF) substrate by solvothermal method. Under optimized conditions, prominently display high areal capacitance 635 μA h cm−2 at current density 3 mA excellent rate capability. As an asymmetric supercapacitor, electrode (cathode) shows 42.6 W kg−1 power 284.8 kg−1. When used as two-dimensional (2D) water splitting reaction, exhibits catalytic activity to achieve 100 overpotential 320 mV in oxygen evolution reaction low 95 50 hydrogen 1.0 M KOH solution. The array is shown be alkaline electrolyzer 10 cell voltage 1.62 V. results demonstrate 2D highly active