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Preparation method and application of manganese pyrophosphate electrode material

An electrode material, manganese pyrophosphate technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems such as increased stability, and achieve the effects of low raw material cost, high yield and good electrochemical performance

Active Publication Date: 2020-11-06
多助科技(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrochemical performance of the electrode materials prepared in these literatures, especially in terms of stability after multiple cycles, there is room for improvement

Method used

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  • Preparation method and application of manganese pyrophosphate electrode material
  • Preparation method and application of manganese pyrophosphate electrode material
  • Preparation method and application of manganese pyrophosphate electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The manganese pyrophosphate electrode material provided in this example is prepared by the following method:

[0038] S1. Take 48g of sodium sulfide nonahydrate and dissolve it in 100mL of deionized water to prepare a sodium sulfide solution with a concentration of about 2mol / L. Take 6.6ml of phosphorus trichloride and drop it into the sodium sulfide solution drop by drop at 5°C. , then stirred and reacted at room temperature for 2-5 hours, put it in the refrigerator to speed up the crystallization, took out the crystals, washed them, and dried them by vacuum filtration to obtain the white powdery precursor I;

[0039] S2. Dissolve 0.4g of the precursor I and 0.5g of soluble divalent manganese salt in water, add 0.5g of polyvinylpyrrolidone, namely the precursor I, manganese chloride (MnCl 2 ), the weight ratio of polyvinylpyrrolidone is 0.8:1:1, stirring and reacting at room temperature for 12 hours, taking out the crystals, washing, vacuum filtration and drying to obt...

Embodiment 2

[0042] The difference between the preparation method of the manganese pyrophosphate electrode material provided in this example and Example 1 is that in step S2, 0.4 g of the precursor I and 0.5 g of soluble divalent manganese salt are dissolved in water, and 0.25 g of polyethylene is added. The weight ratio of pyrrolidone, that is, precursor I, soluble divalent manganese salt, and polyvinylpyrrolidone is 0.8:1:0.5.

[0043] Other steps are identical with embodiment 1.

Embodiment 3

[0045] The difference between the preparation method of the manganese pyrophosphate electrode material provided in this example and Example 1 is that in step S2, 0.4 g of the precursor I and 0.5 g of soluble divalent manganese salt are dissolved in water, and 1 g of polyvinylpyrrolidone is added. , that is, the weight ratio of precursor I, soluble divalent manganese salt, and polyvinylpyrrolidone is 0.8:1:2.

[0046] Other steps are identical with embodiment 1.

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Abstract

The invention discloses a preparation method of a manganese pyrophosphate electrode material, which comprises the following steps: stirring sodium sulfide and phosphorus trichloride to react to obtaina precursor I, adding a soluble divalent manganese salt to dissolve, adding polyvinylpyrrolidone, continuing stirring to react, and finally annealing to obtain the manganese pyrophosphate electrode material. According to the manganese pyrophosphate electrode material prepared by the preparation method, the size of manganese pyrophosphate is accurately regulated and controlled, and the electrochemical performance is more excellent. The preparation method is low in raw material cost, high in product yield, simple and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of battery materials, in particular to the preparation and application of manganese pyrophosphate materials used for energy storage. Background technique [0002] With the rapid development of the world economy, energy consumption has increased, and the depletion of fossil energy and environmental problems have caused great challenges to the global power supply. The emergence of renewable clean energy (such as wind energy, solar energy, water energy, etc.) has largely eased the global energy pressure. However, since these renewable clean energy sources are generated intermittently, unstable supply is a big problem, which will lead to irregular power supply to the grid. Therefore, developing a large-scale energy storage system and cooperating with the smart grid to store unstable energy to match the power supply demand in different time periods and regions is now a feasible solution. [0003] Among energy storage tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/052C01B25/42
CPCC01B25/42C01P2002/72C01P2004/03C01P2006/40H01M4/5825H01M10/052Y02E60/10
Inventor 刘启明万淑云杨希国
Owner 多助科技(武汉)有限公司