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Doping modified Prussian blue based material for sodium-ion batteries and preparation method

A sodium-ion battery and Prussian blue technology, which is applied in the field of doped modified Prussian blue-based materials and its preparation, can solve the problems of low conductivity and unstable structure, and achieve the effects of low cost, short cycle and low energy consumption

Active Publication Date: 2019-05-17
SHANGHAI HANHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structures of these compounds are unstable and their electrical conductivity is low. Therefore, it is necessary to optimize the preparation to improve their electrochemical performance.

Method used

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  • Doping modified Prussian blue based material for sodium-ion batteries and preparation method
  • Doping modified Prussian blue based material for sodium-ion batteries and preparation method
  • Doping modified Prussian blue based material for sodium-ion batteries and preparation method

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Embodiment 1

[0029] Sodium ferrocyanide and sodium chloride are dissolved in deionized water, stirred evenly to obtain a solution I with a concentration of 0.01mol / L in terms of ferrocyanide ion, wherein the molar weight of sodium chloride is 90% of sodium ferrocyanide Times; Dissolve manganous sulfate in deionized water to obtain Mn 2+ A solution with a metered concentration of 0.01mol / L, wherein the volume of the manganous sulfate solution is 0.95 times the volume of sodium ferrocyanide, and is fully stirred to obtain solution II; nickel sulfate is dissolved in deionized water to obtain Ni 2+ A solution with a concentration of 0.01mol / L, in which the volume of nickel sulfate solution is 0.05 times the volume of sodium ferrocyanide, is fully stirred to obtain solution III; then, under continuous stirring, solution II and solution III are alternately added to the solution In I, solution II and solution III are added with 1 / 20 of their volume each time (20 times of addition), solution II is...

Embodiment 2

[0040] Sodium ferrocyanide and sodium sulfate are dissolved in deionized water, stirred evenly to obtain a solution I with a concentration of 0.03mol / L in terms of ferrocyanide ions, wherein the molar weight of sodium sulfate is 40 times that of sodium ferrocyanide; Dissolve manganous chloride in deionized water to obtain 2+ A solution with a metered concentration of 0.03mol / L, wherein the volume of the manganous chloride solution is 0.90 times the volume of sodium ferrocyanide, and is fully stirred to obtain solution II; zinc sulfate is dissolved in deionized water to obtain Zn 2+ A solution with a metered concentration of 0.03mol / L, wherein the volume of the zinc sulfate solution is 0.1 times the volume of sodium ferrocyanide, and the solution III is obtained through thorough stirring; then, under constant stirring, the solution II and the solution III are alternately added to the solution In I, solution II and solution III are each added with 1 / 30 of its volume (30 times of...

Embodiment 3

[0042] Sodium ferrocyanide and sodium citrate are dissolved in deionized water, stirred evenly to obtain a solution I with a concentration of 0.05mol / L in terms of ferrocyanide ion, wherein the molar weight of sodium citrate is 20% of sodium ferrocyanide times; Dissolve manganese nitrate in deionized water to obtain Mn 2+ A solution with a metered concentration of 0.05mol / L, wherein the volume of the manganous nitrate solution is 0.85 times the volume of sodium ferrocyanide, and is fully stirred to obtain solution II; copper sulfate is dissolved in deionized water to obtain 2+ A solution with a concentration of 0.05mol / L, in which the volume of the copper sulfate solution is 0.15 times the volume of sodium ferrocyanide, is fully stirred to obtain the solution III; then, under constant stirring, the solution II and the solution III are alternately added to the solution In I, solution II and solution III are each added with 1 / 50 of their volume (50 times of addition), solution I...

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Abstract

The invention discloses a doping modified Prussian blue based material for sodium-ion batteries and a preparation method. The material comprises the following steps: mixing sodium ferrocyanide, sodiumsalt and deionized water to obtain a solution I; mixing soluble salt containing divalent Mn<2+> and deionized water to obtain a solution II; mixing soluble salt containing divalent M<2+> and deionized water to obtain a solution III; alternately dropwise adding the solution II and the solution III to the solution I, performing a co-precipitation reaction and aftertreatment to obtain doping modified Prussian blue based material particles. The doping modified Prussian blue based material can significantly improve capacity and cyclic stability of the sodium-ion batteries when applied to cathodesof the sodium-ion batteries.

Description

technical field [0001] The invention relates to the technical field of new energy storage batteries, in particular to a doped modified Prussian blue-based material for sodium ion batteries and a preparation method. Background technique [0002] With the development of society and economy, energy consumption is increasing day by day, traditional fossil energy continues to decrease, and human consumption of traditional fossil energy has caused serious environmental pollution. Under this environment, clean, renewable and cheap new energy It has become the object of development by governments of various countries. At present, the proportion of wind energy, solar energy and ocean energy in energy consumption is constantly increasing. However, these renewable energy sources are greatly affected by weather and time periods, and are obviously unstable, discontinuous and irresistible. control characteristics, it is necessary to develop and build supporting electric energy storage (en...

Claims

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Application Information

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IPC IPC(8): C01C3/12H01M4/485H01M4/505H01M4/525H01M4/58H01M10/054
CPCY02E60/10
Inventor 石坚
Owner SHANGHAI HANHANG TECH CO LTD
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