Construction of hybrid Ni-Mn-Co-Ce oxide yolk-double shell hierarchical architectures for enhanced supercapacitors

Abstract

Hybrid metal oxides, possessing the favorable features of each component, are proved suitable candidates for supercapacitors. However, the construction of hybrid metal oxides with intricate hollow architectures is specially challenging. Here we exploit an etching and pyrolysis strategy to synthesis NiO-MnO2-Co3O4-CeO2 yolk-double shell (Ni-Mn-Co-Ce oxide YDS) hierarchical architectures for enhanced supercapacitor performance. First, a Ni-Mn-Co-Ce glycerate templated construction of yolk-shell hierarchical architectures intermediates can be crafted by etching method. The yolk-shell hierarchical architectures intermediates are consequent transformed to the Ni-Mn-Co-Ce oxide YDS hierarchical architectures via pyrolysis. Such designed hybrid Ni-Mn-Co-Ce oxide materials can be deemed attractive electrode for supercapacitor with components and unique architectures. They demonstrate the high specific capacitance of 2126.7 F g-1 at 4.0 A g-1 and a mere 10.2% reduction in 10000 cycles. Furthermore, the Ni-Mn-Co-Ce oxide YDS hierarchical architectures are constructed as cathode in an asymmetric supercapacitor, which achieves an energy density of 100.4 W h Kg-1 at 1200 W Kg-1. This work provides a simple avenue to fabricate complex hollow architecture hybrid metal oxides toward high performance supercapacitors.