Preparation of urchin-like NiCo_2O_4 material and studies of its electrochemical performance for supercapacitors

摘要

The paper reports a kind of NiCo2O4 material with urchin-like morphology. This material was prepared using a facile strategy of hydrothermal process followed by calcinations, and exhibits an excellent electrochemical performance. For example, it delivers a specific capacitance high up to 1167 Fg(-1) at 1 Ag-1 and still retains a value of 1095 Fg(-1) at 10 Ag-1, showing a good rate capability; after suffering from 3000 cycles at 10Ag(-1), the specific capacitance has only a decay of 12%, presenting a good cycling stability.