Three-dimensional porous vanadium pentoxide anode material, and simple preparation method and application of anode material

A technology of vanadium pentoxide and positive electrode materials, applied in vanadium oxide, nanotechnology for materials and surface science, battery electrodes, etc., can solve the problems of limiting the application and promotion of vanadium pentoxide positive electrode materials, poor cycle stability, etc. , to achieve the effects of improving cycle performance and rate performance, preventing agglomeration, and buffering volume changes

Inactive Publication Date: 2018-10-02
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of limiting the application and popularization of the vanadium pentoxide positive electrode material due to the poor cycle stability of the existing nanostructured vanadium pentoxide positive electrode material, and provide a three-dimensional porous vanadium pentoxide positive electrode material and Its simple preparation method and application

Method used

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  • Three-dimensional porous vanadium pentoxide anode material, and simple preparation method and application of anode material
  • Three-dimensional porous vanadium pentoxide anode material, and simple preparation method and application of anode material
  • Three-dimensional porous vanadium pentoxide anode material, and simple preparation method and application of anode material

Examples

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Embodiment 1

[0033] Accurately weigh 300mg of vanadium pentoxide and 830mg of oxalic acid dihydrate, add them into 40mL of deionized water, stir magnetically at 80°C for 5 hours at a speed of 500r / min, then put them in a drying oven and dry at 80°C for 12 hours get the precursor. The precursor was ground in a mortar for 0.5 hour, and then the ground precursor was sintered in an air atmosphere at 500° C. for 5 hours to obtain a three-dimensional porous vanadium pentoxide cathode material.

[0034]Aiming at the problem that the existing nanostructured vanadium pentoxide positive electrode material is prone to agglomeration, which leads to its relatively poor rate performance and cycle performance, and curbs the application of the nanostructured vanadium pentoxide positive electrode material in lithium-ion batteries, the application The inventor, through a large number of experimental studies, prepared a gel precursor by using a vanadium source and a specific type of organic acid as a raw mat...

Embodiment 2

[0037] Accurately weigh 234 mg (2 mmol) of ammonium metavanadate and 2521 mg (20 mmol) of oxalic acid dihydrate, add them to 20 mL of deionized water, stir magnetically at 50 °C for 10 hours at a speed of 200 r / min, and then put them in a drying oven. Dry at 60°C for 12 hours to obtain the precursor. The precursor was ground in a mortar for 3 hours, and then the ground precursor was sintered in an air atmosphere at 300°C for 5 hours to obtain a three-dimensional porous vanadium pentoxide positive electrode material. The three-dimensional porous vanadium pentoxide positive electrode obtained in this example The structure and performance of the material are relatively close to that of Example 1.

Embodiment 3

[0039] Accurately weigh 234mg (2mmol) ammonium metavanadate, 182mg (1mmol) vanadium pentoxide, 1261mg (10mmol) oxalic acid dihydrate, 1181mg (10mmol) succinic acid, add to 20mL deionized water, and stir magnetically at 90°C 5 hours at a rotation speed of 1000r / min, then put into a drying oven, and dry at 90°C for 6 hours to obtain a precursor. The precursor was ground in a mortar for 3 hours, and then the ground precursor was sintered in an air atmosphere at 600°C for 5 hours to obtain a three-dimensional porous vanadium pentoxide positive electrode material. The three-dimensional porous vanadium pentoxide positive electrode obtained in this example The structure and performance of the material are relatively close to that of Example 1.

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Abstract

The invention discloses a three-dimensional porous vanadium pentoxide anode material, and a simple preparation method and application of the anode material and belongs to the technical field of electrochemistry. The simple preparation method of the three-dimensional porous vanadium pentoxide anode material comprises the steps of adding a vanadium source and organic acid into deionized water, performing constant temperature magnetic stirring for a certain time, putting in an oven for drying to form gel, and after grinding, sintering precursor gel in an air atmosphere to form the three-dimensional porous vanadium pentoxide anode material. Compared with the existing preparation technology of the vanadium pentoxide anode material, a reaction process is greatly simplified; raw materials and equipment required are simple; the production is easy to quantify; at the same time, the prepared three-dimensional porous vanadium pentoxide anode material fully develops the advantages in an electrochemical energy storage aspect of a porous structure electrode material; and the cycle performance and rate capability are further improved.

Description

technical field [0001] The invention belongs to the technical field of battery materials and preparation methods thereof, and more specifically relates to a three-dimensional porous vanadium pentoxide cathode material and a simple preparation method and application thereof. Background technique [0002] With the rapid development of the global economy, the exploitation and consumption of energy by human beings has been increasing, which has caused increasing pressure on global energy, especially the growing automobile industry, which has a serious impact on energy consumption and has an immeasurable impact on the environment. Therefore, it is imperative to develop green and pollution-free new energy vehicles. The most critical issue for new energy vehicles is to solve the problem of power drive, which mainly relies on power batteries. Lithium-ion batteries have attracted much attention due to their advantages such as large specific energy, small self-discharge, long cycle l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02H01M4/485H01M10/0525B82Y30/00
CPCB82Y30/00C01G31/02C01P2002/72C01P2004/03H01M4/485H01M10/0525Y02E60/10
Inventor 芮先宏陈栋黄少铭李成超耿洪波
Owner GUANGDONG UNIV OF TECH
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