Flexible molybdenum disulfide/activated carbon cloth composite material, preparation method thereof, and application of composite material in flexible supercapacitor

Abstract

The invention discloses a flexible molybdenum disulfide / activated carbon cloth composite material, a preparation method thereof, and an application of the composite material in a flexible supercapacitor. Carbon cloth is oxidized through a Hummer's method to obtain oxidized carbon cloth, the oxidized carbon cloth is immersed in a mixed solution containing a molybdenum source and a sulfur source, and a hydrothermal reaction is carried out to obtain the flexible molybdenum disulfide / ACC composite material. The composite material has good flexibility and conductivity, and can be directly assembled into a sandwich-type flexible supercapacitor without an additional current collector, and the prepared MoS2 / ACC-based supercapacitor has ultrahigh area capacitance, considerable energy density and cycling stability, and in addition, the composite material has good application prospects. The super capacitor also shows good flexibility and relatively good low temperature resistance.

Description

technical field [0001] The invention relates to a supercapacitor electrode material, in particular to a flexible MoS 2 The / ACC composite material also relates to its preparation method and its application in flexible supercapacitors, belonging to the technical field of supercapacitors. Background technique [0002] With the shortage of fossil energy and the increasingly prominent problem of environmental pollution, in order to find new sustainable energy sources and develop advanced energy storage materials, more and more people have started research on new energy storage devices—supercapacitors. Supercapacitor has the characteristics of high power density, long cycle life, wide operating temperature limit, high charge and discharge efficiency, and no pollution to the environment. It is a recognized new type of green energy storage device. On the other hand, with the development of science and technology, people's increasing demand for portable electronic products has prom...

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Problems solved by technology

However, on the one hand, due to the low capacitance of the CC itself (1-2F / g), and its own weight seriously affects the capacitance of the entire device, the area capacitance of the prepared electrode is still not ideal.

On the other hand, the molybdenum disulfide grown on the carbon cloth is easy to fall off due to the weak binding force, especially when the device is bent and twisted, it is easy to peel off, resulting in poor rate performance and poor flexibility of the device.

Therefore, how to improve the capacitance of the flexible matrix carbon cloth and at the same time improve the interaction force between the carbon cloth and the molybdenum disulfide, so that the molybdenum disulfide can grow uniformly and stably on the carbon cloth, so as to obtain a high-performance molybdenum disulfide-based flexible superstructure. Capacitors still have challenges

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