We first report a composite of molybdenum disulfide (MoS₂) nanoflake arrays (MNFs) and tungsten trioxide (WO₃) nanorod arrays (WNRs) directly grown on a copper (Cu) substrate. This composite is characterized in detail by scanning and transmission electron microscopes (SEM/TEM), X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). All of the evidences indicate that the obtained composite is a heterojunction. The supercapacitive properties of MNFs-WNRs composite heterojunction are measured systematically by using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The heterojunction exhibits a high specific capacitance of 522 F g⁻¹ at 0.5 A g⁻¹, a high capacitance retention (95%) after 5000 cycles and a low charge transfer resistance (1.0 Ω). And this kind of heterojunction has advantages of both MoS₂ and WO₃, which can be a better candidate for supercapacitive electrode material.

我们首先报告直接在铜（Cu）衬底上生长的二硫化钼（MoS ₂）纳米片阵列（MNFs）和三氧化钨（WO ₃）纳米棒阵列（WNRs）的复合材料。通过扫描和透射电子显微镜（SEM / TEM），X射线衍射（XRD），拉曼光谱和X射线光电子能谱（XPS）对该复合材料进行详细表征。所有证据表明，所获得的复合材料是异质结。MNFs-WNRs复合异质结的超电容特性通过循环伏安法（CV），恒电流充放电（GCD）和电化学阻抗谱（EIS）技术进行系统地测量。异质结在0.5 A g ^-1时表现出522 F g ^-1的高比电容，5000次循环后的高电容保持率（95％）和低电荷转移电阻（1.0Ω）。这种异质结同时具有MoS ₂和WO _3的优点，可以更好地用作超电容电极材料。