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High-rate sodium ion battery preparation method

A sodium-ion battery, high-rate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem that the charge-discharge specific capacity and cycle stability cannot meet the requirements of sodium-ion batteries, and achieve material capacity that is not easy to decay and good cycle And rate performance, the effect of high product yield

Inactive Publication Date: 2017-07-28
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its charge-discharge specific capacity and cycle stability still cannot meet the increasingly high requirements of sodium-ion batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of a sodium-ion battery with high rate performance, comprising the following steps:

[0043] (1) Preparation of positive electrode sheet

[0044] 1) Mix ferrous chloride and sodium ferrocyanide with deionized water respectively to prepare solution A and solution B; wherein, the molar ratio of ferrous chloride and sodium ferrocyanide is 0.5:1;

[0045] 2) Add F127 to solution A, stir ultrasonically until the solution is clear, and prepare solution C, stir solution B ultrasonically until clear, then add solution C, mix well, transfer to a hydrothermal kettle, and heat up at a rate of 1°C / min Raise the temperature to 70°C, react for 10 hours, then cool to room temperature at a cooling rate of 0.3°C / min, centrifuge, wash the precipitate with deionized water 3-5 times, and vacuum dry at 110°C for 10 hours to obtain a blue solid;

[0046] 3) Ultrasonicate 20ml of graphite oxide stock solution at 500W power for 1h, add deionized water to prepare 200ml of ...

Embodiment 2

[0059] A preparation method of a sodium-ion battery with high rate performance, comprising the following steps:

[0060] (1) Preparation of positive electrode sheet

[0061] 1) Mix ferrous chloride and sodium ferrocyanide with deionized water respectively to prepare solution A and solution B; wherein, the molar ratio of ferrous chloride and sodium ferrocyanide is 2:1;

[0062] 2) Add F127 to solution A, stir ultrasonically until the solution is clear, and prepare solution C, stir solution B ultrasonically until clear, then add solution C, mix well, transfer to a hydrothermal kettle, and heat up at a rate of 5°C / min Raise the temperature to 90°C, react for 30 hours, then cool to room temperature at a cooling rate of 0.8°C / min, centrifuge, wash the precipitate with deionized water 3-5 times, and vacuum dry at 130°C for 15 hours to obtain a blue solid;

[0063] 3) 40ml of graphite oxide stock solution was ultrasonically treated at a power of 500W for 2h, and then deionized water...

Embodiment 3

[0076] A preparation method of a sodium-ion battery with high rate performance, comprising the following steps:

[0077] (1) Preparation of positive electrode sheet

[0078] 1) Mix ferrous chloride and sodium ferrocyanide with deionized water respectively to prepare solution A and solution B; wherein, the molar ratio of ferrous chloride and sodium ferrocyanide is 0.8:1;

[0079] 2) Add F127 to solution A, stir ultrasonically until the solution is clear, and prepare solution C, stir solution B ultrasonically until clear, then add solution C, mix well, transfer to a hydrothermal kettle, and heat up at a rate of 2°C / min Raise the temperature to 70°C, react for 10 hours, then cool to room temperature at a cooling rate of 0.4°C / min, centrifuge, wash the precipitate with deionized water 3-5 times, and vacuum dry at 110°C for 11 hours to obtain a blue solid;

[0080] 3) 80ml of graphite oxide stock solution was ultrasonically treated at 500W for 1.3h, and then deionized water was ad...

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Abstract

The invention discloses a high-rate sodium ion battery preparation method, which comprises: preparing a Prussian blue material by using ferrous chloride and sodium ferrocyanide as raw materials, preparing Prussian blue nanospheres coated with oxidized graphite, and finally reducing with a hydrazine hydrate solution to prepare Prussian blue nanospheres coated with graphite so as to be used as a sodium ion positive electrode material; and peeling molybdenum disulfide by using isopropyl alcohol and N-methylpyrrolidone as a solvent, coating with oxidized graphite, and finally reducing with a hydrazine hydrate solution to obtain a graphite coated molybdenum disulfide nano-sheet material adopted as a sodium ion negative electrode material. According to the present invention, the additional electric conduction agent is not required to be added during the sodium ion battery preparation process so as to save the cost, and the prepared sodium ion battery has advantages of high capacity, good cycle stability, and excellent rate performance.

Description

[0001] Technical field: [0002] The invention relates to the field of sodium ion batteries, in particular to a preparation method of a sodium ion battery with high rate performance. [0003] Background technique: [0004] In recent years, the rapid growth of my country's economy has led to a sharp increase in the consumption of petroleum resources, and the fuel consumption of the automobile industry accounts for about half of the total petroleum consumption. Facing the challenge of the depletion of global oil resources and the urgent need to improve air pollution, it is urgent for the auto industry to reduce its dependence on oil, reduce pollutants (PM2.5, etc.) and carbon dioxide emissions, and develop energy-saving and new energy auto industries. Among them, pure electric drive is the main strategic orientation for the development of new energy vehicles and the transformation of the automobile industry. The current national policy focuses on promoting the industrialization o...

Claims

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Application Information

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IPC IPC(8): H01M10/0585H01M4/1397H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/1397H01M4/366H01M4/5815H01M4/625H01M10/054H01M10/0585Y02E60/10Y02P70/50
Inventor 李风浪
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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