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Aqueous zinc ion battery vanadium-based positive electrode material and preparation method and application thereof

A zinc-ion battery, cathode material technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of poor rate performance, limited capacity, low cycle stability, etc., achieve high specific capacity, easy to achieve, obvious economic effect

Inactive Publication Date: 2020-08-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most studied cathode materials for aqueous zinc-ion batteries are manganese oxides, Prussian blue analogues, and vanadium oxides, among which the first two cathode materials have poor rate performance, low cycle stability or limited capacity.

Method used

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  • Aqueous zinc ion battery vanadium-based positive electrode material and preparation method and application thereof
  • Aqueous zinc ion battery vanadium-based positive electrode material and preparation method and application thereof
  • Aqueous zinc ion battery vanadium-based positive electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, a method for preparing a vanadium-based cathode material for an aqueous zinc-ion battery comprises the following steps:

[0035] a. 3mmol vanadium oxide V 2 o 5 Put it into a beaker, add 24mL deionized water, and stir in a water bath at 40°C for 30 minutes to form an orange-yellow solution, which is called solution A;

[0036] b. the hydrogen peroxide that 6ml mass percent concentration is 30wt.% is dripped in the solution A prepared in step a that the water bath is stirred, continue to stir 60min under the water bath condition of described step (1), form dark brown homogeneous solution , called solution B;

[0037] c. Put 1 mmol of magnesium acetate into a beaker, add 10 ml of deionized water, and stir until the magnesium acetate is completely dissolved to form a colorless and transparent solution, which is called solution C;

[0038] d. Drop the solution C prepared in step c into the solution B prepared in step b in the water bath stirring, cont...

Embodiment 2

[0046] This embodiment is basically the same as Embodiment 1, and the special features are:

[0047] In this embodiment, a method for preparing a vanadium-based cathode material for an aqueous zinc-ion battery comprises the following steps:

[0048] a. This step is identical with embodiment 1 step;

[0049] B. this step is identical with embodiment 1 step;

[0050] c. Put 1 mmol of magnesium chloride into a beaker, add 10 ml of deionized water, and stir until the magnesium chloride is completely dissolved to form a colorless transparent solution, which is called solution C;

[0051] d. This step is the same as that of Example 1;

[0052] e. This step is the same as that in Example 1.

[0053] Experimental test analysis:

[0054] The zinc ion battery positive electrode material obtained by the method of this embodiment was subjected to battery assembly and electrochemical performance testing. The zinc ion battery prepared by the method of this embodiment is 1A g at a curre...

Embodiment 3

[0056] This embodiment is basically the same as the previous embodiment, and the special features are:

[0057] In this embodiment, a method for preparing a vanadium-based cathode material for an aqueous zinc-ion battery comprises the following steps:

[0058] a. This step is identical with embodiment 1 step;

[0059] B. this step is identical with embodiment 1 step;

[0060] c. Put 1 mmol of magnesium nitrate into a beaker, add 10 ml of deionized water, and stir until the magnesium nitrate is completely dissolved to form a colorless and transparent solution, which is called solution C;

[0061] d. This step is the same as that of Example 1;

[0062] e. This step is the same as that in Example 1.

[0063] Experimental test analysis:

[0064] The zinc ion battery positive electrode material obtained by the method of this embodiment was subjected to battery assembly and electrochemical performance testing. The zinc ion battery prepared by the method of this embodiment is 1A...

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Abstract

The invention discloses an aqueous zinc ion battery vanadium-based positive electrode material which has the following chemical composition: MxV2O5.nH2O, M is Mg or Sn; 0 < x < = 2; 0 < n < = 2. The preparation method comprises the following steps: dissolving vanadium pentoxide in deionized water, dropwise adding an acidic solution after stirring, stirring in a water bath until the reaction is complete, dissolving M salt in deionized water, dropwise adding the solution after complete dissolution, and carrying out hydrothermal reaction after complete reaction. After the obtained positive electrode material is assembled into a button cell, an electrochemical performance test is carried out, and during the test, the current density range is 0.1-10A g <-1 >, and the voltage range is 0.1-1.8 V.The preparation method is simple and convenient, and has low requirements on experimental conditions. The microstructure of the synthetic material is a nanobelt, and the synthetic material has largerinterlayer spacing so that the layered structure is more stable, deintercalation and intercalation of zinc ions are further facilitated, and the assembled zinc ion battery shows excellent cycling stability and rate capability.

Description

technical field [0001] The invention relates to a preparation method and application of a positive electrode material for a zinc ion secondary battery, in particular to a preparation method and application of a water system zinc ion secondary battery positive electrode material, which is applied in the technical field of zinc ion batteries. Background technique [0002] Energy is the basis for the existence and continuous development of human society, and the acquisition and storage of energy plays a vital role in the rational use of natural resources, the development of a low-carbon economy, and the promotion of sustainable development of human society. In the past few decades, with the continuous consumption of fossil energy such as oil and coal, new clean energy technologies such as solar energy, tidal energy, and wind energy have gradually attracted widespread attention from the society. Although clean energy has the advantages of non-pollution and environmental friendli...

Claims

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Application Information

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IPC IPC(8): C01G31/00H01M4/48H01M10/36
CPCC01G31/00C01P2002/72C01P2004/03C01P2004/17C01P2006/40H01M4/48H01M10/36H01M2004/028Y02E60/10
Inventor 程红伟鲁雄刚王娜孙强超吕凡
Owner SHANGHAI UNIV
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