Deformation-Mediated Surface Activation of a Ni–Cu–Mn Ternary Alloy System for Energy Storage in Supercapacitors

Abstract

This report presents a facile approach of surface activation for significantly enhancing the energy storage performance in a Ni–Cu–Mn ternary alloy system. The activated surface accompanied by selective chemical dealloying resulted in a highly uniform, in situ-generated nanoporous, flaky surface enriched with hybrid oxides. The activated surface exhibits outstanding volumetric capacitance of 3862.5 F/cm3 at a current density of 2 A/cm3 with 95% capacitance retention after 10 000 cycles. Moreover, the symmetric device delivers the volumetric capacitance of 286 F/cm3 at the current density of 1 A/cm3 with a high power density and energy density of 750 W/L and 89.37 Wh/L, respectively.

Single-step, in-situ fabrication of flower-like NiCuMn hybrid oxyhydroxide electrodes for enhanced supercapacitor performance

“…This is owing to the wide stable potential window provided by nickel and manganese along with superior electrical conductivity offered by copper. The wide difference in the redox potentials of Ni and Mn further provides an opportunity to generate tailored nano-porous structures through selective dealloying approach, thereby providing a large ionaccessible active area [19]. Few studies in literature report on the performance of NiCuMn alloy electrodes for energy storage applications.…”