A kind of in-situ synthesis of tungsten trioxide/vanadium pentoxide composite electrode material based on carbon cloth and its preparation method

Abstract

The invention discloses an in-situ synthesis of tungsten trioxide / vanadium pentoxide composite electrode material based on carbon cloth and a preparation method thereof. The carbon cloth is pretreated with nitric acid solution; the Na 2 WO 4 2H 2 Dissolve O in deionized water, adjust the pH to obtain solution A, immerse the pretreated carbon cloth in solution A for a homogeneous hydrothermal reaction, and wash and dry the product after the reaction to obtain a tungsten trioxide / carbon cloth composite material; followed by the preparation of V 2 o 5 Precursor solution, using tungsten trioxide / carbon cloth composite material as a secondary substrate and in-situ synthesis of V by impregnation-hydrothermal method 2 o 5 Precursor; Finally, three-dimensional tungsten trioxide / tungsten vanadium oxide nanocomposites are generated in situ on the surface of carbon cloth by heat treatment. The nanocomposite material prepared by the present invention has excellent capacitive properties, at 4.5mA cm ‑2 The specific capacity can reach 3692mF cm under the current density ‑2 , the synthesis process is simple, the reproducibility is good, the efficiency is high, the environment is friendly, and it has broad application prospects in the fields of electrochemistry and new energy.

Description

In-situ synthesis of tungsten trioxide / vanadium pentoxide composite electrode material based on carbon cloth and preparation method thereof technical field The invention belongs to new energy electrode material technical field, be specifically related to a kind of in-situ synthesis of trioxide based on carbon cloth Tungsten / vanadium pentoxide composite electrode material and preparation method thereof. Background technique In recent years, the sources of fossil fuels are limited, the world population is increasing continuously, and the accompanying technological development is also not As one of the most widely used electrochemical energy storage devices, the power density of supercapacitors is much higher than that of electricity storage. battery, the energy density is about 10-100 times that of traditional capacitors, with long cycle life, high power density, and fast charge and discharge speed Etc. It has attracted the attention of the majority of scientific an...

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Problems solved by technology

WO synthesized by Pargati et al. 3 Nanorods at 5mV s -1 The specific capacity can reach 538F g under the scanning speed -1 However, since the energy storage process involved in the nanomaterials prepared by the above method mainly comes from the energy storage of the electric double layer, the specific capacity of tungsten oxide cannot be greatly improved.

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