Preparation of self-supporting materials using room temperature stirring method NiMoO4@CoMoO4 research on core-shell nanocomposites and their capacitive properties

In this paper, foam nickel conductive substrate NiMoO4@CoMoO4 self-supporting core-shell structure composite material. The microstructure and phase structure of the sample were analyzed through characterization tests such as SEM, TEM, XRD, proving that the prepared material is a self-supporting core-shell structure composite material. The NiMoO4@CoMoO4 composite materials (131.3 m2/g) have a larger specific surface area compared to single materials NiMoO4(100.79 m2/g) and CoMoO4(99.28 m2/g). This self-supporting core-shell structure is conducive to full contact between the electrode material and the electrolyte, thereby accelerating the electrochemical reaction and storing more charges. Further electrochemical performance tests were conducted on the material using a single electrode. The research results showed that the specific capacity of the material was 1712 F/g at a current density of 5 A/g. After 10,000 cycles, the capacitance retention rate was 99.3%.In the experiment, it was also studied that NiMoO4@CoMoO4 self-supporting core-shell structure composite material as positive electrode, carbon nanotubes (CNTs) as negative electrode, matching high-performance NiMoO4@CoMoO4 //CNTs solid-state asymmetric supercapacitors. The research results indicate that the asymmetric device has a high power density (energy density of 80.6 Wh/kg) and energy density (corresponding to a power density of 8000 W/kg). At a current density of 5 A/g, the device has a specific capacitance retention rate of 97.3% after 10,000 cycles, indicating that the asymmetric device has excellent cycling stability. This article is about the synthesis of excellent-performance NiMoO4@CoMoO4 composite materials providing an efficient and convenient method.