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Preparation of novel vanadium oxide anode materials by valence state regulation and surface modification

A technology of vanadium oxide and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of non-capacitive performance and poor stability, and achieve low cost, wide source of raw materials, and increased electrochemical surface area. big effect

Active Publication Date: 2022-03-04
JIANGXI NORMAL UNIV
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Problems solved by technology

[0004] In order to overcome the disadvantages of vanadium oxide in the prior art that have no capacitance and poor stability in the negative potential range, the present invention provides a method for preparing a modified vanadium oxide electrode material

Method used

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  • Preparation of novel vanadium oxide anode materials by valence state regulation and surface modification
  • Preparation of novel vanadium oxide anode materials by valence state regulation and surface modification
  • Preparation of novel vanadium oxide anode materials by valence state regulation and surface modification

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the following examples.

[0023] First, vanadium oxide is obtained by a hydrothermal method, that is, the following steps are performed:

[0024] (a) Will (NH 4 )VO 3 Dissolve in the mixed solution of deionized water and ethanol, stir until dissolved;

[0025] (b) Use concentrated acid (concentrated hydrochloric acid or concentrated nitric acid) to adjust the pH value to 1.5-3.5;

[0026] (c) solution is transferred in the reactor;

[0027] (d) Immerse the carbon cloth in the solution and seal it, place it in an oven, set the temperature at 140-180°C, react for 12 hours, and cool down naturally;

[0028] (e) Take out the vanadium oxide carbon cloth material obtained after the reaction, wash with ethanol and deionized water three times respectively, and air-dry.

[0029] Then, the obtained vanadium oxide carbon cloth material is modifie...

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Abstract

The invention prepares a novel vanadium oxide negative electrode material through valence state regulation and surface modification. Provided is a method for preparing a modified vanadium oxide electrode material. The method adopts a vapor deposition method and uses an inert gas as a carrier gas to deposit phosphate on the surface of vanadium oxide to obtain a modified vanadium oxide electrode material. The modified vanadium oxide not only introduces low-valence vanadium ions and phosphate groups, but also increases the electrochemical surface area, active sites, lithium ion diffusion rate, and shortened diffusion channels, thereby effectively improving The capacitive performance and cycle stability of nickel sulfide have great application prospects in energy storage.

Description

technical field [0001] The invention belongs to the technical field of modification of energy storage materials, and more specifically relates to a preparation method of a modified vanadium oxide electrode material. Background technique [0002] The ever-increasing demand for energy and the continuous deterioration of the environment, as well as the great demand for energy storage devices in industrial development, have made people more and more interested in the development and exploration of new energy storage devices. Asymmetric supercapacitors (ASCs) have attracted the attention of researchers in recent years because of their higher power density, longer durability and better safety compared with lithium-ion batteries. One electrode in an asymmetric supercapacitor is an energy-type electrode, which mainly uses the pseudocapacitance provided by the Faraday redox reaction to store and release energy, usually using pseudocapacitive electrode materials such as metal oxides, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCY02E60/13
Inventor 曾承辉郑恺李浩然刘旻陈昭陈菲
Owner JIANGXI NORMAL UNIV
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