Low-cost Prussian white material and preparation method and application thereof

A Prussian white, low-quality technology, applied in the field of low-cost Prussian white materials and its preparation, can solve the problems of low actual capacity, high sodium deficiency, and high manufacturing cost, and achieve high capacity, increased sodium content, and low cost.

Pending Publication Date: 2021-12-24
浙江宇钠科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of this material is carried out in the water phase, and the sodium deficiency is relatively large, causing the actual capacity to be lower than the theoretical value. In addition, a large amount of deionized water is required for synthesis and cleaning, resulting in higher actual manufacturing costs.

Method used

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  • Low-cost Prussian white material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolving sodium ferrocyanide decahydrate in tap water to obtain a solution I with a concentration of 0.3mol / L; dissolving manganese sulfate monohydrate, zinc sulfate heptahydrate, and sodium citrate in tap water to obtain manganese sulfate monohydrate and heptahydrate Solution II with a total concentration of zinc sulfate of 0.3 mol / L, wherein the molar ratio of manganese sulfate monohydrate and zinc sulfate heptahydrate is 9:1, the ratio of the moles of sodium citrate to the total moles of manganese sulfate monohydrate and zinc sulfate heptahydrate The ratio is 4:1; mix solution I and solution II, and obtain a suspension by co-precipitation at 60°C; age the suspension at 60°C for 4 hours, add sodium thiosulfate during the aging process, and add The molar ratio of the molar amount of manganese sulfate monohydrate and zinc sulfate heptahydrate is 1:1; finally, it is centrifuged with tap water and dried in vacuum at 110°C to obtain the Prussian white material. The Pruss...

Embodiment 2

[0044] Dissolve sodium ferrocyanide decahydrate in river water to obtain a solution I with a concentration of 0.2mol / L; dissolve manganese sulfate monohydrate, nickel sulfate hexahydrate, and sodium citrate in river water to obtain manganese sulfate monohydrate and hexahydrate Solution II with a total concentration of nickel sulfate of 0.2mol / L, wherein the molar ratio of manganese sulfate monohydrate and nickel sulfate hexahydrate is 8:1, the ratio of the moles of sodium citrate to the total moles of manganese sulfate monohydrate and nickel sulfate hexahydrate The ratio is 3:1; mix solution I and solution II, and obtain a suspension by co-precipitation at 60°C; age the suspension at 60°C for 4 hours, add sodium iodide during the aging process, and add mole The ratio of the amount of manganese sulfate to the total molar amount of manganese sulfate monohydrate and nickel sulfate hexahydrate is 1:1; finally, it is centrifuged in river water and dried in vacuum at 110°C to obtain ...

Embodiment 3

[0046] Dissolve sodium ferrocyanide decahydrate in seawater to obtain a solution I with a concentration of 0.4mol / L; dissolve manganese sulfate monohydrate, copper sulfate pentahydrate, and sodium citrate in seawater to obtain manganese sulfate monohydrate and pentahydrate Solution II with a total concentration of copper sulfate of 0.4mol / L, wherein the molar ratio of manganese sulfate monohydrate and copper sulfate pentahydrate is 10:1, the ratio of the moles of sodium citrate to the total moles of manganese sulfate monohydrate and copper sulfate pentahydrate The ratio is 5:1; mix solution I and solution II, and obtain a suspension by co-precipitation at 60°C; age the suspension at 60°C for 4 hours, add sodium tetrathionate during the aging process, and add The ratio of the molar amount to the total molar amount of manganese sulfate monohydrate and copper sulfate pentahydrate is 1:1; finally, it is centrifuged with sea water and dried in vacuum at 110°C to obtain the Prussian ...

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Abstract

The invention discloses a Prussian white material NaxM [Fe (CN) 6] y.zH2O and a preparation method thereof. The preparation method specifically comprises the following steps: mixing sodium ferrocyanide with low-quality water to obtain a solution I; mixing soluble bivalent transition metal salt, organic acid salt and low-quality water to obtain a solution II; and mixing the solution I and the solution II, carrying out a coprecipitation reaction, and supplementing sodium with a reducing inorganic acid sodium salt to obtain the Prussian white material with high sodium content and high crystallinity. The method is beneficial to reducing the manufacturing cost of the Prussian white material, improving the manufacturing efficiency of the Prussian white material and improving the integrity and electrochemical performance of material crystal lattices.

Description

technical field [0001] The invention relates to the field of new energy storage batteries, in particular to a low-cost Prussian white material and its preparation method and application. Background technique [0002] Currently, common energy storage batteries include sodium-sulfur batteries, lithium-ion batteries, lead-acid batteries, and flow batteries. However, the overall performance of this type of energy storage battery is not ideal, and it faces problems such as cost, resources, environmental protection, low energy density, and poor safety. In contrast, sodium-ion batteries have comprehensive advantages such as good safety, low cost, abundant resources, and environmental friendliness, and are very suitable for large-scale energy storage. Prussian blue materials are suitable as anode materials for sodium-ion batteries due to the open framework structure in their structure, which is conducive to the deintercalation of large-sized sodium ions. However, the synthesis of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/054C01C3/12
CPCH01M4/58H01M10/054C01C3/12C01P2006/40Y02E60/10
Inventor 刘双宇洪国林李堃吴可人谢健
Owner 浙江宇钠科技有限公司
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