Preparation method of prussian blue analogue nano-material and use of prussian blue analogue in sodium-ion battery

A Prussian blue-like, sodium-ion battery technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of difficulty in forming high-proportion sodium intercalation compounds, inability to be used in production and life, poor cycle stability, etc. Simple method and low cost effect

Active Publication Date: 2016-10-05
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But due to β-Al 2 o 3 The electrolyte can only show high ionic conductivity under high temperature conditions, so that sodium-ion batteries can only meet the use standards in a relatively high temperature range (523k ~ 573k), which cannot be applied to daily production and life.
In recent years, sodium-ion batteries at room temperature have been extensively studied. However, because the size of sodium ions is much larger than

Method used

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  • Preparation method of prussian blue analogue nano-material and use of prussian blue analogue in sodium-ion battery
  • Preparation method of prussian blue analogue nano-material and use of prussian blue analogue in sodium-ion battery
  • Preparation method of prussian blue analogue nano-material and use of prussian blue analogue in sodium-ion battery

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Experimental program
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Effect test

Embodiment 1

[0029] Example 1 Sample 1 # ~Sample 5 # preparation of

[0030] Add the aqueous solution containing potassium ferrocyanide into the buffer solution containing the metal element M, mix evenly, stir for a period of time, make it fully react, and obtain flocculent precipitates of different colors. After centrifuging the obtained precipitate, washing it with deionized water at least three times, and vacuum drying at 80° C., the Prussian blue-like nanomaterial is obtained.

[0031] For sample number, raw materials and preparation conditions, see surface 1 .

[0032] surface 1

[0033]

Embodiment 2

[0034] Example 2 Sample 6 # ~Sample 9 # preparation of

[0035] Add the aqueous solution containing potassium ferrocyanide into the buffer solution containing the metal element M, mix evenly, and stir for a period of time to allow it to fully react to obtain a flocculent precipitate. After the obtained precipitate was centrifuged, washed three times with deionized water, and vacuum-dried at 80° C., the Prussian blue-like nanomaterial was obtained.

[0036] For sample number, raw materials and preparation conditions, see surface 2 .

[0037] surface 2

[0038]

Embodiment 3

[0039] Example 3 Sample 1 # ~Sample 9 # XRD characterization

[0040] respectively for sample 1 # ~Sample 9 # Carry out XRD characterization, the result shows, sample 1 # ~Sample 9 # All are high-purity samples with Prussian blue crystal structure. Take sample 6 # ~9 # As a typical representative, its XRD spectrum Figure as shown 1 shown. sample 1 # ~Sample 5 # XRD spectrum picture with sample 6 # Close, that is, the peak position and shape are the same, and the relative peak intensity fluctuates in the range of ±10% according to the change of synthesis conditions, indicating that the synthesized product has the characteristics of Prussian blue crystal structure.

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Abstract

The invention discloses a preparation method of a prussian blue analogue nano-material and a use of the prussian blue analogue nano-material in a sodium-ion battery. The preparation method at least utilizes a metal M-containing salt and potassium ferrocyanide as raw materials and a coprecipitation method to prepare a prussian blue analogue nano-material. The prussian blue analogue nano-material has a chemical formula of MHCNFe, wherein metal M represents at least one of Ni, Cu, Fe and Co. The preparation method has simple processes, utilizes cheap raw materials and is suitable for large scale industrial production. The prussian blue analogue nano-material has uniform nanoscale and grain sizes, is used as a sodium-ion battery negative electrode active material and has high cycling stability.

Description

technical field [0001] The application relates to a preparation method of a Prussian blue-like nanomaterial, the Prussian blue-like nanomaterial prepared therefrom and its application in a sodium-ion battery as an anode active material, belonging to the field of sodium-ion batteries. Background technique [0002] With the intensification of the globalization process, the contradiction between the supply and demand of petrochemical resources has become increasingly prominent, and the problem of environmental pollution has become increasingly serious. Finding and developing alternative green energy has become a common concern of the scientific and technological circles and the industry. In recent years, lithium-ion batteries have been widely used in the fields of electric vehicles and portable devices due to their unique advantages, and have been continuously explored in the fields of electric tools and new energy vehicles. However, due to the limited lithium resources, from F...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/054B82Y30/00
CPCY02E60/10
Inventor 沈彩靳岩辛凤霞韩伟强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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