Method for improving sodium storage performance of vanadium pentoxide electrode material through zinc ion pre-embedding

An electrode material and performance technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor inherent conductivity, affecting sodium storage performance, and unstable layered structure, achieving low cost and high Na+ intercalation/extraction Activity, effect of improving sodium storage performance

Inactive Publication Date: 2019-04-16
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, V 2 o 5 ·nH 2 The disadvantages of unstable layered structure and poor intrinsic conductivity of O seriously affect its sodium storage performance.

Method used

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  • Method for improving sodium storage performance of vanadium pentoxide electrode material through zinc ion pre-embedding
  • Method for improving sodium storage performance of vanadium pentoxide electrode material through zinc ion pre-embedding
  • Method for improving sodium storage performance of vanadium pentoxide electrode material through zinc ion pre-embedding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) First, 0.2547g of commercial vanadium pentoxide (V 2 o 5 ) powder and 3.85mL deionized water were mixed and stirred, and 1.15mL of 30% H2O was slowly added dropwise while stirring. 2 o 2 , continue to stir for 15 minutes after the addition is complete, then add deionized water to it to dilute the solution to the concentration of vanadium pentoxide Finally, the solution was transferred to an ultrasonic cleaner to continue ultrasonic treatment for 90 minutes, and left to age at room temperature for 3 days to obtain a reddish-brown V 2 o 5 gel.

[0020] (2) Stir and disperse the gel obtained in step (1), and dilute it with 25 mL of deionized water, and stir thoroughly for 6 hours to obtain a uniform and transparent V 2 o 5 sol

[0021] (3) The sol obtained in step (2) was frozen in the refrigerator for 24 hours and then transferred to a freeze dryer to dry to constant weight and then taken out to obtain V 2 o 5 ·nH 2 O electrode material precursor.

[002...

Embodiment 2

[0024] (1) First, 0.2547g of commercial vanadium pentoxide (V 2 o 5 ) powder and 3.85mL deionized water were mixed and stirred, and 1.15mL of 30% H2O was slowly added dropwise while stirring. 2 o 2 , continue to stir for 15 minutes after the addition is complete, then add deionized water to it to dilute the solution to the concentration of vanadium pentoxide Finally, the solution was transferred to an ultrasonic cleaner to continue ultrasonic treatment for 90 minutes, and left to age at room temperature for 3 days to obtain a reddish-brown V 2 o 5 gel.

[0025] (2) The gel obtained in step (1) was stirred and dispersed, and 25 mL of Zn(NO 3 ) 2 The solution was slowly added dropwise to the gel while stirring, and a uniform and transparent V was obtained after thorough stirring for 6 hours. 2 o 5 sol

[0026] (3) The sol obtained in step (2) was frozen in the refrigerator for 24 hours and then transferred to a freeze dryer to dry to a constant weight and then take...

Embodiment 3

[0029] (1) First, 0.2547g of commercial vanadium pentoxide (V 2 o 5 ) powder and 3.85mL deionized water were mixed and stirred, and 1.15mL of 30% H2O was slowly added dropwise while stirring. 2 o 2 , continue to stir for 15 minutes after the addition is complete, then add deionized water to it to dilute the solution to the concentration of vanadium pentoxide Finally, the solution was transferred to an ultrasonic cleaner to continue ultrasonic treatment for 90 minutes, and left to age at room temperature for 3 days to obtain a reddish-brown V 2 o 5 gel.

[0030] (2) The gel obtained in step (1) was stirred and dispersed, and 25 mL of Zn(NO 3 ) 2 The solution was slowly added dropwise to the gel while stirring, and a uniform and transparent V was obtained after thorough stirring for 6 hours. 2 o 5 sol

[0031] (3) The sol obtained in step (2) is frozen in the refrigerator for 24 hours and then transferred to a freeze dryer to dry to constant weight and then taken o...

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Abstract

The invention discloses a method for improving the sodium storage performance of a vanadium pentoxide electrode material through zinc ion pre-embedding. Firstly, commercial vanadium pentoxide (V2O5) powder is used as a vanadium source, zinc nitrate hexahydrate (Zn(NO3)2.6H2O) is used as a zinc source, hydrogen peroxide (H2O2) is used as a cosolvent, a Zn<2+> pre-embedded V2O5.nH2O precursor is prepared by combining a sol-gel method with a vacuum freeze-drying technology, and then annealing treatment is carried out in air to obtain the Zn<2+> pre-embedded V2O5.nH2O electrode material. The cyclic stability and rate capability of V2O5.nH2O serving as a sodium ion battery positive electrode material can be obviously improved through the Zn<2+> pre-embedded V2O5.nH2O, and meanwhile, the methodalso has the advantages of simple preparation method, low cost, high yield, easiness in reaction condition control and the like.

Description

technical field [0001] The invention relates to the technical field of anode materials for sodium ion batteries, in particular to a 2+ Pre-embedded to improve vanadium pentoxide (V 2 o 5 ·nH 2 O) A method for the sodium storage properties of electrode materials. Background technique [0002] In recent years, with the rapid consumption of traditional fossil energy, and the problems caused by it, such as energy shortage and environmental pollution, have gradually attracted people's attention. Therefore, it is imperative to develop new types of efficient and clean energy, and energy conversion storage devices are important carriers of new energy. Among many energy conversion and storage devices, lithium-ion batteries have been widely used in aerospace, portable electronic devices and other fields due to their high energy density and environmental friendliness. However, the rapid consumption of single metal lithium resources has greatly increased the production cost of lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/054
CPCH01M4/366H01M4/483H01M4/626H01M4/628H01M10/054Y02E60/10
Inventor 李延伟孙涛姚金环季靖程
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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