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Prussian blue sodium ion battery positive electrode material and preparation method thereof

A sodium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor rate performance and cycle stability, and achieve the effects of improved rate performance, high crystallinity, and large specific surface area

Active Publication Date: 2020-11-17
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved in the present invention is to overcome the defects of poor rate performance and cycle stability when existing Prussian blue materials are used as positive electrode materials for sodium ion batteries, thereby providing a kind of Prussian blue class sodium ion battery positive electrode materials. Preparation

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  • Prussian blue sodium ion battery positive electrode material and preparation method thereof
  • Prussian blue sodium ion battery positive electrode material and preparation method thereof
  • Prussian blue sodium ion battery positive electrode material and preparation method thereof

Examples

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Embodiment 1

[0042] The present embodiment provides a kind of preparation method of Prussian blue class sodium ion battery cathode material, comprises the following steps:

[0043]3mmol sodium ferrocyanide decahydrate was dissolved in a mixed solvent composed of 70mL deionized water and 30mL absolute ethanol to obtain precursor solution A;

[0044] Dissolve 6mmol manganese sulfate monohydrate and 6mmol 2,2'-bipyridine in a mixed solvent composed of 70mL deionized water and 30mL absolute ethanol to obtain precursor solution B;

[0045] use figure 1 The device shown is for co-precipitation reaction, wherein container A is equipped with precursor solution A, container B is equipped with precursor solution B, container A and container B are connected through a silica gel conduit, and a peristaltic pump is set on the silica gel conduit to control the drop of precursor solution B Acceleration rate, a magnetic stirrer is installed under the container A to heat and stir the reaction liquid. Feed...

Embodiment 2

[0053] The present embodiment provides a kind of preparation method of Prussian blue class sodium ion battery cathode material, comprises the following steps:

[0054] 3mmol sodium ferrocyanide decahydrate was dissolved in a mixed solvent composed of 60mL deionized water and 40mL acetonitrile to obtain precursor solution A;

[0055] 6mmol nickel dichloride hexahydrate and 9mmol diethylenetriamine were dissolved in a mixed solvent composed of 60mL deionized water and 40mL acetonitrile to obtain precursor solution B;

[0056] use figure 1 The device shown is for co-precipitation reaction, wherein container A is equipped with precursor solution A, container B is equipped with precursor solution B, container A and container B are connected through a silica gel conduit, and a peristaltic pump is set on the silica gel conduit to control the drop of precursor solution B Acceleration rate, a magnetic stirrer is installed under the container A to heat and stir the reaction liquid. Fe...

Embodiment 3

[0064] The present embodiment provides a kind of preparation method of Prussian blue class sodium ion battery cathode material, comprises the following steps:

[0065] 3mmol sodium ferrocyanide decahydrate was dissolved in a mixed solvent composed of 80mL deionized water and 20mL acetic acid to obtain precursor solution A;

[0066] Dissolve 6mmol ferrous acetate and 6mmol 1-10-phenanthroline in a mixed solvent composed of 80mL deionized water and 20mL acetic acid to obtain precursor solution B;

[0067] use figure 1 The device shown is for co-precipitation reaction, wherein container A is equipped with precursor solution A, container B is equipped with precursor solution B, container A and container B are connected through a silica gel conduit, and a peristaltic pump is set on the silica gel conduit to control the drop of precursor solution B Acceleration rate, a magnetic stirrer is installed under the container A to heat and stir the reaction liquid. Argon was introduced in...

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Abstract

The invention provides a preparation method of a Prussian blue sodium ion battery cathode material, which comprises the following steps: adding a chelating agent into a precursor solution B and addingan auxiliary solvent to enhance the solubility of the chelating agent; reacting a transition metal salt with the chelating agent, so that transition metal ions can be slowly released when the precursor solution A reacts with the precursor solution B, thereby obtaining the Prussian blue sodium ion battery cathode material, and achieving control on the reaction rate. Therefore, the morphology of the generated Prussian blue sodium ion battery positive electrode material is controlled, the flaky high-crystallinity Prussian blue material is obtained, the diffusion and transmission paths of ions and electrons can be shortened, and the conductivity of the positive electrode material is improved. As a result, the rate performance of the sodium ion battery is improved, the open three-dimensional frame of the Prussian blue material is stable due to the high crystallinity, and the transition metal is not easily separated out during the charge-discharge process so as to improve the cycle stability of the sodium ion battery.

Description

technical field [0001] The invention relates to the technical field of energy materials, in particular to a Prussian blue-type sodium-ion battery cathode material and a preparation method thereof. Background technique [0002] Due to the serious environmental problems and the greenhouse effect caused by the extensive use of traditional energy materials, the use of new clean energy has attracted widespread attention. However, new clean energy is greatly affected by time and space, and usually cannot provide stable and high-quality energy. Therefore, the development of low-cost large-scale energy storage power stations has gradually attracted attention and development. Lithium-ion batteries are excellent electronic energy storage devices. They have been developed from portable electronic devices to high-power electric vehicles, large-scale energy storage power stations, and smart grids. Sustainable development and large-scale application of ion batteries. Compared with lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/11H01M4/58H01M10/054
CPCC01C3/11H01M4/58H01M10/054C01P2006/40C01P2004/03C01P2002/72Y02E60/10
Inventor 白会涛徐丽李慧薛晴姜银珠
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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