Sodium-ion battery anode material as well as preparation method and application thereof

A cathode material and sodium element technology, which is applied in the field of cathode materials for sodium ion batteries and their preparation, can solve problems such as the application of difficult solid-state sodium ion batteries, and achieve the effects of complete crystallization and fewer structural defects.

Active Publication Date: 2018-07-06
济宁中科恩吉科创新产业园管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Prussian blue-like sodium-ion battery positive electrode material provided by this sch

Method used

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  • Sodium-ion battery anode material as well as preparation method and application thereof
  • Sodium-ion battery anode material as well as preparation method and application thereof
  • Sodium-ion battery anode material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0062] This embodiment provides a kind of preparation method of cathode material, and its specific method is:

[0063] (1) Under stirring conditions at 25°C and a speed of 500rpm, both solution A and solution B are added dropwise to water at a rate of 0.5mL / min, and the suspension is obtained after the addition is complete; the solution A is decahydrate Sodium ferrocyanide and sodium chloride are dissolved in water to form a mixed solution, and the solution B is a mixed solution formed by dissolving cobalt chloride and complexing agent sodium citrate in water;

[0064] (2) centrifuging the suspension described in step (1), taking the solid, and drying the obtained solid in a vacuum drying oven at 100° C. and a vacuum of 10 mTorr for 48 hours to obtain the positive electrode material;

[0065] Wherein, in the suspension described in step (1), the mass concentration of sodium chloride is 1wt%, and in solution A, the concentration of sodium ferrocyanide is 0.02mol / L; in solution ...

Embodiment 2

[0070] This embodiment provides a kind of preparation method of cathode material, and its specific method is:

[0071] (1) Under the stirring conditions of 50°C and a speed rate of 300rpm, both solution A and solution B were added dropwise to water at a rate of 0.1mL / min. After the addition was complete, the obtained suspension was placed in a hydrothermal kettle The hydrothermal reaction was carried out at 175°C for 20 hours to obtain a suspension after the hydrothermal reaction; the solution A was sodium ferrocyanide decahydrate and sodium chloride dissolved in water to form a mixed solution, and the solution B was manganese chloride and Complexing agent EDTA is dissolved in the mixed solution that forms in water;

[0072] (2) Centrifuge the suspension after the hydrothermal reaction described in step (1), take the solid, and dry the obtained solid in a vacuum drying oven at 110°C and a vacuum of 12.5mTorr for 36h to obtain the described Cathode material;

[0073] Wherein,...

Embodiment 3

[0082] This embodiment provides a kind of preparation method of cathode material, and its specific method is:

[0083] (1) Under the condition of stirring at 70°C and a rate of 1000rpm, both solution A and solution B were added dropwise to water at a rate of 1.0mL / min. After the addition was complete, the obtained suspension was placed in a hydrothermal kettle Hydrothermal reaction at 200°C for 15 hours to obtain a suspension after the hydrothermal reaction; the solution A is sodium ferrocyanide decahydrate and sodium chloride dissolved in water to form a mixed solution, and the solution B is nickel sulfate and complex A mixed solution formed by dissolving acetic acid in water;

[0084] (2) Centrifuge the suspension after the hydrothermal reaction described in step (1), take the solid, and dry the obtained solid in a vacuum oven at 120° C. and a vacuum of 15 mTorr for 24 hours to obtain the positive electrode Material;

[0085] Wherein, in the suspension described in step (1...

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Abstract

The invention provides a sodium-ion battery anode material as well as a preparation method and application thereof. The anode material comprises doped prussian blue, wherein the prussian blue comprises a sodium element; the anode material is free of water. The preparation method of the anode material provided by the invention comprises the following steps: (1) mixing a solution A and a solution Bso as to obtain a suspension, wherein the solution A is a mixed solution of sodium ferrocyanide and sodium chloride; the solution B is a mixed solution of a doping source and a complexing agent; (2) performing solid-liquid separation on the suspension of the step (1), and collecting and drying a solid, thereby obtaining the anode material. The sodium-ion battery anode material provided by the invention has a univoltage platform, is excellent in charge and discharge property, is free of water and thus is particularly applicable to anodes of solid sodium ion batteries. The preparation method ofthe anode material provided by the invention is simple in process, low in cost and applicable to industrial application.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a positive electrode material of a sodium ion battery, a preparation method and an application thereof. Background technique [0002] In recent years, with the gradual development and application of lithium-ion batteries from portable electronic devices to high-power electric vehicles, large-scale energy storage power stations and smart grids, the demand for lithium-ion batteries is increasing, but limited lithium resources limit the use of lithium-ion batteries. of sustainable development. And sodium reserves are abundant, and sodium-ion batteries will be an important supplement to lithium-ion batteries in large-scale energy storage applications. Sodium and lithium are in the same main group and have similar chemical properties, so it is feasible to construct a sodium-ion battery that works similarly to a lithium-ion battery. [0003] However, whether it is a lithium-ion batt...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054
CPCH01M4/58H01M10/054H01M2004/028Y02E60/10
Inventor 赵君梅仝梓正刘会洲沈杏
Owner 济宁中科恩吉科创新产业园管理有限公司
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