A carbon cloth-loaded layered hexagonal phase tungsten trioxide supercapacitor electrode material and preparation method thereof

Abstract

The invention discloses a carbon cloth-loaded layered hexagonal phase tungsten trioxide supercapacitor electrode material and a preparation method thereof. First, the carbon cloth is pretreated with a nitric acid solution; the Na 2 WO 4 2H 2 O was dissolved in deionized water, and the pH was adjusted to a predetermined value to obtain solution A; secondly, the pretreated carbon cloth was immersed in the polytetrafluoroethylene lining with solution A for homogeneous hydrothermal reaction. After the reaction was completed, The product is washed and dried to obtain a precursor; finally, the precursor is calcined to obtain a carbon cloth-supported layered hexagonal phase tungsten trioxide supercapacitor electrode material. The carbon cloth-supported layered hexagonal phase tungsten trioxide electrode material prepared by the present invention has excellent capacitance performance, at 8mA cm ‑2 The specific capacity can reach 2918mF cm under the current density ‑2 , 50mA cm ‑2 Under the high current density, after 5000 cycles, the capacity retention rate is 99.3%, and the synthesis process of the invention is simple, non-toxic and pollution-free, and it is a supercapacitor electrode material with potential advantages.

Description

A carbon cloth supported layered hexagonal phase tungsten trioxide supercapacitor electrode material and the same Preparation technical field The invention belongs to the technical field of supercapacitors, be specifically related to a kind of carbon cloth load layered hexagonal phase tungsten trioxide supercapacitor. Grade capacitor electrode material and preparation method thereof. Background technique [0002] Energy storage and energy storage are the key links for the efficient production and rational use of renewable energy. Currently, electrochemical Energy storage devices are the primary method of storing renewable energy. Supercapacitors as a Clean Energy Device and Renewable Energy The new energy storage system for power generation equipment has the advantages of long cycle life, high power density, and fast charging and discharging speed. The electrode material As one of the main components of supercapacitors, the material is the key to determine its ele...

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Problems solved by technology

However, as a transition metal oxide, there is a large volume expansion / contraction during the charge and discharge process, resulting in a decline in its stability, rate performance and conductivity.

[0004] In response to the above problems, Palanisamy et al. synthesized WO by microwave-assisted wet chemistry. 3 -ZnS nanocomposites, Jin et al. synthesized WO by electrochemical deposition 3 / G / PT textile electrodes, Hai et al. synthesized (2D)WO by two-step atomic layer deposition 3 (TiO 2 NP-WO 3 ) thin film electrodes, although current methods achieve WO 3 As a supercapacitor electrode material, the overall performance is improved, but the experimental conditions are harsh, special equipment is required, the reaction time is long, the preparation process is complicated and there are too many by-products in the process, which is not very environmentally friendly

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