The disadvantages that prevent supercapacitors from swapping batteries in most of the applications are linear discharge voltage, low specific energy, and high cost. Here, we report the fabrication of a new nanocomposite electrode by strategically combining ferrous tungstate and functionalized multiwalled carbon nanotubes (FeO₄W/f-MWCNTs) hydrothermally for high-performance supercapacitors. This supercapacitor electrode shows specific capacitance as high as 875 Fg⁻¹. The cycle tests show capacitance retention of 89.17% after huge 10,000 cycles in three electrode system. Further, a symmetric supercapacitor device made of FeO₄W/f-MWCNTs delivers a high specific capacitance with good capacitance retention. Such a discovery of a novel electrode certainly paves way for the development of advanced nanocomposite electrodes for energy storage applications with substantial improvement in charge time, specific power, cycle life, and safety. Analytical techniques such as ultraviolet–visible spectroscopy and Fourier transform infrared spectroscopy confirm the presence of functionalities in the composite, whereas thermogravimetric analysis of the nanocomposite reveal better thermal stability compared to its counterparts. The crystallinity of the composite is ascertained by X-ray diffraction technique. The interplanner spacing (dhkl) in the nanomaterial is measured from high-resolution transmission electron microscopy and selected area electron diffraction methods. Energy-dispersive X-ray analysis is used for elemental analysis.

在大多数应用中，阻止超级电容器更换电池的缺点是线性放电电压，低比能量和高成本。在这里，我们报告了通过策略性地将钨酸亚铁和功能化的多壁碳纳米管（FeO ₄ W / f-MWCNTs）进行水热战略结合以制造高性能超级电容器的新型纳米复合电极的制造。该超级电容器电极显示出高达875 Fg ^-1的比电容。循环测试显示，在三电极系统中进行10,000次循环后，电容保持率为89.17％。此外，由FeO ₄制成的对称超级电容器装置W / f-MWCNT提供高比电容并具有良好的电容保持率。对新型电极的这种发现无疑为先进的纳米复合电极的开发铺平了道路，该电极用于能量存储，其充电时间，比功率，循环寿命和安全性得到了显着改善。诸如紫外可见光谱和傅里叶变换红外光谱之类的分析技术证实了复合材料中存在功能，而与纳米复合材料相比，纳米复合材料的热重分析显示出更好的热稳定性。复合物的结晶度通过X射线衍射技术确定。纳米材料中的平面间距（dhkl）是通过高分辨率透射电子显微镜和选定区域电子衍射方法测量的。