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Synthesis method and application method of manganese Prussian blue analog material for lithium ion battery

A technology similar to Prussian blue and lithium-ion batteries, which is applied in the synthesis and application of manganese-based Prussian blue materials for lithium-ion batteries. It can solve the problems of limited theoretical capacity and poor cycle stability of graphite materials, and achieve improved electrochemical performance. Reduced reaction time and reduced production costs

Inactive Publication Date: 2019-05-10
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anode materials are the key materials for lithium-ion battery energy storage. At present, graphite-based materials have been industrialized as anode materials for lithium-ion batteries. However, in view of the limited theoretical capacity and poor cycle stability of graphite materials, it is now necessary to seek and develop high New negative electrode material with specific capacity

Method used

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  • Synthesis method and application method of manganese Prussian blue analog material for lithium ion battery
  • Synthesis method and application method of manganese Prussian blue analog material for lithium ion battery
  • Synthesis method and application method of manganese Prussian blue analog material for lithium ion battery

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Embodiment 1

[0053] Example 1: Preparation method and structural characterization of manganese-based Prussian blue-like materials for lithium-ion batteries

[0054] The source of manganese is anhydrous manganese chloride (MnCl 2 ), ferricyanide comes from potassium ferricyanide (K 3 [Fe(CN) 6 ]), the chelate selects sodium citrate dihydrate;

[0055] Weigh three 1mmol anhydrous manganese chloride (MnCl 2 ) and 2mmol sodium citrate dihydrate were completely dissolved in 25ml, 50ml, and 100ml deionized water respectively to obtain colorless, clear and transparent solution A, solution B and solution C respectively. Another weighed 1mmol potassium ferricyanide (K 3 [Fe(CN) 6 ]) was dissolved in 25ml of deionized water to obtain solution D. After stirring and dissolving completely, pour C part of solution D into solution A, solution B and solution C respectively to obtain solution E, solution F and solution G respectively, and stand still at room temperature After 12 hours, they were coll...

Embodiment 2

[0062] Embodiment 2: weigh 1mmol anhydrous manganese chloride (MnCl 2 ), 2mmol sodium citrate dihydrate was completely dissolved in 25ml deionized water to obtain a colorless, clear and transparent solution A. Weigh again 1mmol potassium ferricyanide (K 3 [Fe(CN) 6 ]) was dissolved in 25ml of deionized water to obtain solution B, and solution B was poured into solution A and mixed evenly to obtain solution C, which was left to stand at room temperature for 6 hours, separated and purified, and dried at 60°C for 12 to 24 hours to obtain white powder product. The product is manganese-like Prussian blue, the microscopic shape is cubic, and the microscopic particle size is 150-180nm.

Embodiment 3

[0063] Embodiment 3: weigh 0.5mmol manganese chloride monohydrate (MnCl 2 ·H 2 (0), 2mmol anhydrous sodium citrate was completely dissolved in 25ml deionized water to obtain a colorless, clear and transparent solution A. Weigh again 1mmol potassium ferricyanide (K 3 [Fe(CN) 6 ]) was dissolved in 25ml deionized water to obtain solution B, and solution B was poured into solution A and mixed uniformly to obtain solution C, which was left to stand at room temperature for 24 hours to obtain the final white powder product. The product is a manganese-like Prussian blue with a cubic microscopic shape and a particle size distribution of 310-410nm.

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Abstract

The invention discloses a synthesis method and application method of manganese Prussian blue material for a lithium ion battery, and belongs to the preparation and application method of the manganesePrussian blue material. The synthesis method comprises the following steps: selecting a manganese source from anhydrous manganese chloride (MnCl2) or manganese chloride monohydrate (MnCl2.H2O); selecting an iron source and cyanogen from potassium ferricyanide (K3[Fe(CN)6]); selecting a chelating agent from anhydrous sodium citrate or sodium citrate dihydrate; weighing the manganese source and theclelating agent in mass ratio of x: 1, and dissolving into a mixed solution with the methyl alcohol and deionized water in any proportion to prepare a solution A; dissolving the potassium ferricyanideinto the deionized water to prepare the solution B with the concentration of 0.04mol / L; pouring the solution B into the solution A, uniformly mixing to acquire the solution C, standing for 6-24h at the room temperature, and separating, purifying and drying to obtain a target product. The synthesis method disclosed by the invention has the advantages that the raw material is easy to obtain, the synthesis method is simple, the operation step is high in controllability, the obtained product is high in purity, and uniform in particle size; and the structure is a hollow cube and easy to prepare ina large-scale manner. The manganese Prussian blue material disclosed by the invention is served as the lithium ion battery negative material, and is excellent in electrochemical performance.

Description

technical field [0001] The invention relates to a method for preparing and applying a manganese-based Prussian blue material, in particular to a method for synthesizing and applying a manganese-based Prussian blue material for lithium-ion batteries. Background technique [0002] Energy issues are an integral part of today's social development. Due to the non-renewability and pollution problems during the use of traditional fossil energy such as petroleum and coal, it has become a difficult problem for social development today. Therefore, the use and development of renewable resources and the construction of a new energy pattern have become an inevitable trend of social development. . However, clean energy such as solar energy and tidal energy have defects such as unstable sources and obvious geographical restrictions, so they cannot be efficiently used in actual production and life. Therefore, the development of large-scale energy storage technology has become an inevitabl...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/139H01M4/04H01M10/058H01M10/0525
CPCY02E60/10Y02P70/50
Inventor 邢政王晶晶任海朋聂川昊鞠治成
Owner CHINA UNIV OF MINING & TECH
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