Preparation method of high-potential cathode material of lithium ion battery

A positive electrode material and high potential technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle performance and low potassium content, and achieve the effects of low cost, reduced reaction rate, and good reproducibility

Active Publication Date: 2019-03-08
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

[0006] The main purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a high-potential cathode material for a potassium-io

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  • Preparation method of high-potential cathode material of lithium ion battery
  • Preparation method of high-potential cathode material of lithium ion battery

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preparation example Construction

[0030] In an embodiment, a method for preparing a high-potential cathode material for a potassium ion battery includes the following steps:

[0031] Step S1: Add potassium ferrocyanide to deionized water to dissolve to form solution A;

[0032] Step S2, adding iron salt, potassium citrate, citric acid and iron powder as iron sources to deionized water to form a mixed solution B;

[0033] Step S3: Drop the solution A into the mixed solution B and stir continuously;

[0034] Step S4, after the reaction is over, stand still;

[0035] Step S5: Collect the precipitate and dry it.

[0036] Since citric acid and iron powder react to generate hydrogen during the synthesis process, the device spontaneously forms a positive pressure atmosphere to protect the device, avoid oxygen entering the oxidized sample during synthesis, and increase the potassium content and initial capacity of Prussian blue. At the same time, the addition of reducing agents and complexing agents such as citric acid reduces ...

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Abstract

A preparation method of a high-potential cathode material of a lithium ion battery comprises the following steps: S1, dissolving potassium ferrocyanide in deionized water to form a solution A; S2, adding ferric salt as an iron source, potassium citrate, citric acid and iron powder in the deionized water to form a mixed solution B; S3, dropwise adding the solution A in the mixed solution B, and continuously stirring; S4, after reaction is finished, standing; and S5, collecting precipitates and drying the same. The preparation method is convenient to operate, low in cost and good in repeatability, the synthesized prussian blue is in nano scale, and the cycle performance of the lithium ion battery made from the cathode material can be improved.

Description

Technical field [0001] The invention relates to a potassium ion battery material, in particular to a preparation method of a potassium ion battery high-potential anode material. Background technique [0002] With the continuous consumption of lithium and cobalt resources and the sharp increase in prices, the cost of products that rely on lithium-ion batteries continues to rise. This problem has severely restricted the application of lithium-ion batteries in the field of large-scale energy storage. It is currently a research hotspot to find a new type of ion battery with abundant resources, high energy density, high cycle life and safety. [0003] Recently, potassium ion batteries have received extensive attention from academia and industry due to their advantages such as good matching with commercial graphite and abundant potassium resources. At present, it is a hot and difficult point to find a compatible potassium ion cathode material. Prussian Blue Analog K 2 M[Fe(CN) 6 ](PBs)...

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Application Information

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IPC IPC(8): C01C3/12H01M4/62H01M10/054
CPCC01C3/12C01P2004/64H01M4/628H01M10/054Y02E60/10
Inventor 董嘉慧翟登云李宝华康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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