Aqueous sodium ion battery na 0.58 mn 2 o 4 1.38h 2 oMaterials and their preparation methods and applications, electrodes

A na0.58mn2o4·1.38h2o, sodium ion battery technology, applied in battery electrodes, secondary batteries, active material electrodes, etc., to achieve the effect of low cost, simple process and good controllability of conditions

Active Publication Date: 2020-11-03
深圳为方能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a big gap in the commercial application of these materials.

Method used

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  • Aqueous sodium ion battery na <sub>0.58</sub> mn <sub>2</sub> o <sub>4</sub> 1.38h <sub>2</sub> oMaterials and their preparation methods and applications, electrodes
  • Aqueous sodium ion battery na <sub>0.58</sub> mn <sub>2</sub> o <sub>4</sub> 1.38h <sub>2</sub> oMaterials and their preparation methods and applications, electrodes
  • Aqueous sodium ion battery na <sub>0.58</sub> mn <sub>2</sub> o <sub>4</sub> 1.38h <sub>2</sub> oMaterials and their preparation methods and applications, electrodes

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preparation example Construction

[0025] The aqueous sodium ion battery Na of the embodiment of the present invention 0.58 mn 2 o 4 1.38H 2 The O material is the flower-like Na 0.58 mn 2 o 4 1.38H 2 O material. The preparation method may include, for example, the following steps: mixing potassium permanganate solution, divalent manganese salt and carbon quantum dot mixed solution, collecting the precipitate, soaking in the soaking solution, separating, collecting the solid, and obtaining the positive electrode material of the aqueous sodium ion battery Flower Na 0.58 mn 2 o 4 1.38H 2 O material.

[0026] Wherein, the soaking solution includes a mixture of NaOH and alcohol and water. Soak in the soaking solution to play the role of ion exchange, so as to obtain Na through the method of low temperature redox combined with ion exchange 0.58 mn 2 o 4 1.38H 2 O material.

[0027] In the embodiment of the present invention, the mixed solution of potassium permanganate solution, divalent manganese sa...

Embodiment 1

[0039] Configuration A solution: 0.1mol / L potassium permanganate solution; B solution: 0.1mol / L manganese chloride + 1mg / mL carbon quantum dot solution.

[0040] Under the stirring condition of 500r / min, add solution B dropwise to 50mL of solution A, the mass ratio of potassium permanganate in solution A, divalent manganese salt in solution B and carbon quantum dots is 10:20:1 in turn, half an hour finished adding.

[0041] The precipitate obtained by the reaction was cleaned by suction filtration and soaked in a mixed solution of NaOH propanol and water for 24 hours, centrifuged at 2000r / min for 3min, washed and dried to obtain an aqueous sodium ion battery Na 0.58 mn 2 o 4 1.38H 2 O material.

Embodiment 2

[0043] The difference between this embodiment and embodiment 1 is: the divalent manganese salt in the B solution is the MnSO of 0.1mol / L 4 .

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Abstract

The invention relates to an aqueous sodium ion battery Na<0.58>Mn<2>O<4>.1.38H<2>O material, preparation method and application thereof and an electrode, and belongs to the field of material and energy storage. The preparation method of the material comprises the steps of mixing a mixed solution of a potassium permanganate solution, divalent manganese salt and carbon quantum dots, collecting a precipitant, immersing the precipitant in an immersion liquid, performing separation, and collecting a solid to obtain the aqueous sodium ion battery Na<0.58>Mn<2>O<4>.1.38H<2>O material, wherein the immersion liquid comprises a mixture of NaOH and alcohol and water. The preparation method is simple in process and good in condition controllability, the obtained Na<0.58>Mn<2>O<4>.1.38H<2>O material has relatively high capacity and excellent cycle property when applied to an aqueous ion battery positive material, and the electrode containing the Na<0.58>Mn<2>O<4>.1.38H<2>O material has the characteristics of high safety, no pollution, low cost and long service lifetime.

Description

technical field [0001] The invention relates to the field of new materials and energy storage, and in particular to a water system sodium ion battery Na 0.58 mn 2 o 4 1.38H 2 O materials and their preparation methods and applications, electrodes. Background technique [0002] Aqueous sodium-ion batteries use an aqueous solution containing sodium ions as the electrolyte, and the positive electrode is composed of different ion intercalation compounds. When charging, sodium ions come out of the positive electrode and diffuse to the negative electrode through the electrolyte, where adsorption or intercalation reactions occur at the negative electrode, and electrons are transferred from the positive electrode to the negative electrode. The discharge process is the opposite of the charge process. [0003] Like lithium-ion batteries, the key to sodium-ion battery research lies in high-performance positive materials. However, due to the sodium ion radius Specific lithium ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/02H01M4/505H01M10/36
CPCH01M4/02H01M4/505H01M10/36Y02E60/10
Inventor 杨应昌郭雷石维罗兴怀秦杨黄伟
Owner 深圳为方能源科技有限公司
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