Sodium ion battery negative electrode material and preparation method thereof

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as general structural stability, low electronic conductivity, and poor cycle performance, and achieve improved structural stability and electrical conductivity. Improve the use effect and realize the effect of waste utilization

Inactive Publication Date: 2022-02-08
扬州钠安能源科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of processing sodium-ion batteries, the material requirements for its positive and negative electrodes are relatively high. In the process of preparing the negative electrode materials of existing sodium-ion batteries, lithium potassium titanate is often used as the negative electrode material of lithium batteries. Although The modified material has a large interplanar spacing, which is conducive to intercalation and extraction of ions at the layer, but due to the general structural stability of the material, the cycle performance is poor and the electronic conductivity is low.

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  • Sodium ion battery negative electrode material and preparation method thereof

Examples

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preparation example Construction

[0022] see figure 1 , the present invention provides a kind of technical scheme: a kind of its preparation method of sodium-ion battery negative electrode material, comprises the following steps:

[0023] Step 1: Put the potassium source, titanium source, lithium source and potassium molybdate into the mixing equipment for stirring and mixing fully, and then use the grinding equipment to grind them to obtain powder;

[0024] Step 2: Put the powder obtained in Step 1 into a platinum crucible, and then put it into a sintering furnace for sintering. The sintering time is 5 hours. After the sintering is completed, cool it down for use;

[0025] Step 3: repeatedly washing the product obtained in step 2 with boiling water, and then drying it with drying equipment to obtain lithium potassium titanate;

[0026] Step 4: mixing the carbon source with the product in step 3, and then introducing into a sintering furnace and sintering again for 2 hours to obtain carbon-wrapped lithium pot...

Embodiment 1

[0029] Take the same amount of potassium source, titanium source, lithium source and potassium molybdate into the mixing equipment for stirring and mixing fully, and then use the grinding equipment to grind it, the grinding is dry grinding, the grinding time is 2-3h, and the powdery Put the obtained powder into a platinum crucible, and then put it into a sintering furnace for sintering. The temperature condition of the sintering furnace is 1100°C, and the sintering time is 5h. After the sintering is completed, it is cooled to room temperature for use. The finished product is washed repeatedly, and then dried by drying equipment to obtain lithium potassium titanate. The carbon source is mixed with the dried lithium potassium titanate, and then introduced into the sintering furnace for sintering again for 2 hours. The temperature of the sintering furnace The condition is 600°C to obtain carbon-wrapped lithium potassium titanate;

[0030] The material obtained in Example 1 was us...

Embodiment 2

[0032] Take the same amount of potassium source, titanium source, lithium source and potassium molybdate into the mixing equipment for stirring and mixing fully, and then use the grinding equipment to grind it, the grinding is dry grinding, the grinding time is 2-3h, and the powdery Put the obtained powder into a platinum crucible, and then put it into a sintering furnace for sintering. The temperature condition of the sintering furnace is 1100°C, and the sintering time is 5h. After the sintering is completed, it is cooled to room temperature for use. The final product is washed repeatedly, and then dried by drying equipment to obtain lithium potassium titanate;

[0033] Then use the material obtained in Example 2 to make negative electrode material and test its electrochemical performance.

[0034] The performance test results are as follows:

[0035] circularity Conductivity Storage capacity Embodiment one high high high Embodiment two Low ...

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Abstract

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: 1, putting a potassium source, a titanium source, a lithium source and potassium molybdate into mixing equipment, performing stirring and mixing fully, and then performing grinding by using grinding equipment to obtain powder; 2, putting the powder obtained in the step 1 into a platinum crucible, putting the platinum crucible into a sintering furnace to be sintered for 5h, and performing cooling for standby application after sintering is completed. The carbon source is prepared from the dried small shrimps, and then the potassium lithium titanate is coated with the carbon source, so that the structural stability and the conductivity of the potassium lithium titanate can be effectively improved, the using effect of the potassium lithium titanate as the negative electrode material is remarkably improved, and the carbon source is prepared from the dried small shrimps, so waste utilization can be achieved, and the resources are utilized to the maximum degree; meanwhile, the storage capacity and the cycle performance can be further improved, and meanwhile, the dried small shrimps are renewable energy sources, so that the method is suitable for sustainable development.

Description

technical field [0001] The invention relates to the technical field of sodium ion batteries, in particular to a negative electrode material for a sodium ion battery and a preparation method thereof. Background technique [0002] Lithium batteries are a type of batteries that use lithium metal or lithium alloys as positive / negative electrode materials and use non-aqueous electrolyte solutions. [0003] With the development of lithium batteries, the demand is increasing. However, the limited amount of lithium has brought great obstacles to the development of lithium batteries. In order to ensure the sustainable development of batteries, the existing utilization Sodium ions replace lithium ions, and the amount of sodium ions is larger, so it is more suitable for long-term development than lithium ions. [0004] In the process of processing sodium-ion batteries, the material requirements for its positive and negative electrodes are relatively high. In the process of preparing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/485H01M4/136
CPCH01M4/5825H01M4/485H01M4/136Y02E60/10
Inventor 方淳卢高军
Owner 扬州钠安能源科技有限公司
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