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Vanadium pentoxide nanobelt with hydrogen bond network as well as preparation and application thereof

A nanobelt and hydrogen bond technology, applied in the field of electrochemistry, can solve problems such as unsatisfactory electrochemical performance, specific capacity decay, hindering the kinetic process of electrochemical intercalation reaction, etc., to achieve improved electrochemical performance, stable cycle performance, The effect of excellent rate performance

Pending Publication Date: 2022-01-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter what kind of process it is, it will seriously hinder the kinetic process of the entire electrochemical intercalation reaction, and finally reflect the unsatisfactory electrochemical performance.
Therefore, the specific capacity of most of the currently reported cathode materials exhibits a significant attenuation at high currents.

Method used

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  • Vanadium pentoxide nanobelt with hydrogen bond network as well as preparation and application thereof
  • Vanadium pentoxide nanobelt with hydrogen bond network as well as preparation and application thereof
  • Vanadium pentoxide nanobelt with hydrogen bond network as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A V with a hydrogen bond network 2 o 5 The preparation method of the nanoribbon The preparation method comprises:

[0036] 1) Mix 3 mmol of commercial V 2 o 5 Dissolve the powder in 24mL of deionized water and stir in a beaker to form a uniformly dispersed yellow suspension;

[0037] 2) Add 250mmol H to the suspension obtained in step 1) 2 o 2 , stirring and dissolving to form a uniformly dispersed orange solution.

[0038] 3) Add different amounts of 2, 10, 30mmol NH to the solution obtained in step 2) 4 Cl salt, stirred evenly, moved into the reactor, hydrothermally reacted at 200°C for 48 hours, centrifuged and washed, and then freeze-dried to obtain V with hydrogen bond network with different ammonium ion concentrations. 2 o 5 nanobelt.

[0039] The scanning electron microscope picture of the product of this embodiment is shown in figure 2 As shown, it can be seen that compared to the original commercial block V 2 o 5 , The product obtained in Example 1...

Embodiment 2

[0047] A V with a hydrogen bond network 2 o 5 The preparation method of the nanoribbon The preparation method comprises:

[0048] 1) Mix 3 mmol of commercial V 2 o 5 Dissolve the powder in 40mL of deionized water and stir in a beaker to form a uniformly dispersed yellow suspension;

[0049] 2) Add 300mmol to the suspension obtained in step 1), stir and dissolve to form a uniformly dispersed orange solution.

[0050] 3) Add 10mmol NH in the solution obtained in step 2) 4 Cl, stirred evenly, moved into the reactor, hydrothermally reacted at 180°C for 48 hours, centrifuged and washed, and then freeze-dried to obtain V with a hydrogen bond network 2 o 5 nanobelt.

[0051] With the V with hydrogen bond network obtained in this example 2 o 5 Taking nanobelts as an example, the structural characterization and electrochemical performance improvement are similar to those in Example 1.

Embodiment 3

[0053] A V with a hydrogen bond network 2 o 5 The preparation method of the nanoribbon The preparation method comprises:

[0054] 1) Mix 3 mmol of commercial V 2 o 5 Dissolve the powder in 50mL deionized water and stir in a beaker to form a uniformly dispersed yellow suspension;

[0055] 2) Add 250ml H to the suspension obtained in step 1) 2 o 2 , stirring and dissolving to form a uniformly dispersed orange solution.

[0056] 3) Add 30mmol NH in the solution obtained in step 2) 4 Cl, stirred evenly, moved into the reactor, hydrothermally reacted at 200°C for 48 hours, centrifuged and washed, and then freeze-dried to obtain V with a hydrogen bond network 2 o 5 nanobelt.

[0057] With the V with hydrogen bond network obtained in this example 2 o 5 Taking nanobelts as an example, the structural characterization and electrochemical performance improvement are similar to those in Example 1.

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Abstract

The invention discloses a V2O5 nanobelt with a hydrogen bond network. Ammonium ions are embedded into a V2O5 interlayer structure, hydrogen bonds are formed between hydrogen atoms in the ammonium ions and oxygen atoms in V2O5 to construct a hydrogen bond network, and the width of the nanobelt is 10-60 nm. A preparation method comprises the following steps: dissolving V2O5 powder in deionized water to form a uniformly dispersed yellow suspension; adding H2O2 into the obtained yellow suspension, and performing stirring and dissolving to form a uniformly dispersed orange solution; and adding ammonium salt into the orange solution, performing uniform stirring, performing heating, performing hydrothermal reaction, performing centrifugally separation and washing, and performing freeze-drying to obtain a final product. By introducing the ammonium ions, the V2O5 with the hydrogen bond network is successfully prepared, so that proton storage based on hydrogen bonds is increased, and the electrochemical performance of the aqueous zinc ion battery is remarkably improved.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular to a V with a hydrogen bond network 2 o 5 Nanobelts and their preparation and applications. Background technique [0002] In the past 40 years, batteries based on the electrochemical topological intercalation mechanism of lithium ions have been widely used due to their excellent energy density. However, finding alternative energy storage devices is still an urgent task due to the safety issues posed by organic electrolytes and the high price of raw materials. need. In this context, rechargeable zinc-ion batteries (AZIBs) have been extensively studied due to their low cost (about 2$kg -1 , metal zinc price; ~75ppm, earth abundance), good environmental compatibility, and high specific capacity of zinc metal (~820mA h g -1 ). Unfortunately, due to the Zn—H 2 Strong interaction of O, Zn for charge transport 2+ Ions tend to undergo solvation in aqueous electrolytes to form large-si...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M10/36B82Y30/00C01G31/02
CPCH01M4/48H01M10/36B82Y30/00C01G31/02H01M2004/028Y02E60/10
Inventor 韩春华李明麦立强王选朋
Owner WUHAN UNIV OF TECH
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