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Summary: The CoMoO4 microspheres constructed from ultrathin nanosheets were synthesized by means of a simple chemical precipitation using urotropin (C6H12N4) as a soft template, which were used as the electrode materials for supercapacitors. It was found that the CoMoO4 sample with 3 mmol of added urotropin (vs 1 mmol CoCl2) exhibits the uppermost specific capacity value of 89 mAh/g at a current density of 0.25 A/g due to its unique mesoporous structure and large specific surface area. In addition, a hybrid supercapacitor was established by the CoMoO4 microspheres (positive electrode) and activated carbon (AC, negative electrode). The obtained CoMoO4//AC hybrid supercapacitor possesses a specific energy value of 34 Wh/kg at 375 W/kg. Most importantly, this device owns excellent cycle stability with no capacity decay observed after 10 000 cycles. These good electrochemical properties of CoMoO4 microspheres are promising in the practical use fields. [ABSTRACT FROM AUTHOR]

Nanosheet-constructed porous CoMoS 4 arrays are grown on 3D self-supported Ni foam by a simple solvothermal strategy. The resulting sample can be immediately served as an adhesive-free electrode of supercapacitors. Surprisingly, the obtained CoMoS 4 /Ni foam with high chemical activity and unique structure exhibits excellent performance including the high specific capacity of 276 mAh/g at 0.25 A/g. Moreover, the prepared CoMoS 4 /Ni foam and commercial activated carbon (AC) are specified as the positive/negative electrodes of a hybrid supercapacitor. The assembled CoMoS 4 /Ni foam//AC hybrid device outputs a high specific energy of 58 Wh/kg at a specific power of 328 W/kg, and 95% of initial capacity after 10,000 charge-discharge cycles. These conditions are favorable for the practical application of the prepared CoMoS 4 /Ni foam. Therefore, the nanosheet-constructed porous CoMoS 4 arrays on Ni foam can be considered as a hopeful electrode for energy storage devices. [ABSTRACT FROM AUTHOR]