精细石油化工中间体国家工程研究中心（ERC）知识库

We have designed and synthesized CoS₂ and MoS₂/CoS₂ nanotube arrays by one-step hydrothermal method using Co(OH)₂ nanorod arrays as the template. The products were characterized by X-ray diffraction pattern, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and transmission electron microscopy. The MoS₂/CoS₂ electrode is demonstrated to have a relatively high area capacitance of 142.5 mF cm^–2 at 1 mA cm^–2, which is higher than that of CoS₂ or MoS₂ electrode. Besides, the electrode also shows excellent cycle stability of 1000 cycles with 92.7% retention, which is also superior to that of CoS₂ and MoS₂ electrodes. These results indicate that MoS₂/CoS₂ nanotube arrays have potential as electrode materials of supercapacitors because of the synergistic reaction of MoS₂ (which supplies the specific surface area and effective electrolyte accessibility) and CoS₂ (which serves as a conductive channel and reduces the phenomenon of aggregation). The design of MoS₂/CoS₂ architecture may open up a new strategy for synthesizing promising electrode materials for supercapacitors.