Microwave‐Assisted Rapid Synthesis of Urchin‐Like Bimetallic Mn–Co Carbonate Composites for High‐Performance Supercapacitors

Abstract

AbstractHerein, we developed a novel microwave‐assisted hydrothermal synthetic method for urchin‐like bimetallic manganese‐cobalt carbonate composites. Compared with the traditional process, the microwave‐assisted hydrothermal process is not only environmentally friendly, but also more convenient. The electrode of supercapacitors prepared at 120 °C for 10 min exhibited the best electrochemical performance, which could deliver a high capacitance of 839.58 F g−1 at 1 mA cm−2 and remain 82.12 % of its initial capacitance even after 8,000 successive charge‐discharge cycles at a high current density of 6 mA cm−2. We have found the possibility of using a microwave‐assisted hydrothermal process to synthesize the urchin‐like bimetallic manganese‐cobalt carbonate composites, which is of great importance for the application of bimetallic manganese‐cobalt carbonate composites in the supercapacitor field.