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Preparation technique of three-dimensional porous carbon and application of three-dimensional porous carbon in sodium-ion batteries

A three-dimensional porous, preparation technology, applied to battery electrodes, circuits, electrical components, etc., to achieve the effects of low cost, convenient large-scale preparation, and stable cycle performance

Inactive Publication Date: 2016-05-18
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation technique of three-dimensional porous carbon and application of three-dimensional porous carbon in sodium-ion batteries
  • Preparation technique of three-dimensional porous carbon and application of three-dimensional porous carbon in sodium-ion batteries
  • Preparation technique of three-dimensional porous carbon and application of three-dimensional porous carbon in sodium-ion batteries

Examples

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Embodiment 1

[0019] Weigh 0.1g of citric acid and 1g of potassium chloride in a beaker, add an appropriate amount of deionized water and stir evenly, transfer the stirred solution to a petri dish, and put it in an oven at 60°C for drying. The dried product was placed in a crucible, sintered at 500° C. under nitrogen for 5 hours, and cooled naturally to obtain a black powder sample. The obtained black powder sample is added to deionized water, sonicated and stirred to obtain a suspension, and then the suspension is centrifuged several times to remove potassium chloride in the black powder. Finally, the collected product is placed in an oven and dried at 60-80°C to obtain a three-dimensional porous carbon. The prepared sample was analyzed by SEM and showed a three-dimensional porous structure composed of a large number of nanosheets. The material obtained in Example 1 was made into a button battery according to the following method: the prepared three-dimensional porous carbon nanosheet samp...

Embodiment 2

[0021] Weigh 0.2g of sucrose and 1.85g of potassium chloride into a beaker, add an appropriate amount of deionized water and stir evenly, transfer the stirred solution to a petri dish, and put it in an oven at 60°C for drying. The dried product was placed in a crucible, sintered at 500° C. under nitrogen for 5 hours, and cooled naturally to obtain a black powder sample. The obtained black powder sample is added to deionized water, sonicated and stirred to obtain a suspension, and then the suspension is centrifuged several times to remove sodium sulfate in the black powder. Finally, the collected product is placed in an oven and dried at 60-80°C to obtain a three-dimensional porous carbon. Using the prepared sample as the negative electrode, a button battery was prepared according to the steps in Example 1 and its electrochemical performance was analyzed. Such as image 3 As shown, the three-dimensional porous carbon nanosheets prepared in Example 2 are used as the negative el...

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Abstract

The invention relates to a preparation technique of three-dimensional porous carbon. The specific preparation method comprises the following steps: adding a carbon source and a soluble ion salt into a container according to a certain mass ratio, adding a right amount of deionized water, and stirring to obtain a homogeneous solution; drying the obtained homogeneous solution, sintering at 500-800 DEG C under nitrogen conditions for 5-10 hours, and naturally cooling to obtain a black powder sample; adding the black powder sample into deionized water, carrying out ultrasonic treatment and stirring to obtain a suspension, and centrifuging the suspension many times to remove the soluble ion salt in the black powder; and drying the obtained product to obtain three-dimensional porous carbon nanosheets. The three-dimensional porous carbon nanosheets are applied to a sodium-ion battery negative pole material. The sample prepared by the technique has a three-dimensional porous structure, and is composed of abundant nanosheets. The three-dimensional porous carbon has higher charge / discharge capacity and stable cycle performance when being used as a sodium-ion battery negative pole material.

Description

Technical field [0001] The invention relates to a preparation method and application of a novel sodium ion battery negative electrode material, and belongs to the field of energy storage materials and electrochemical power supplies. technical background [0002] The development of renewable energy is an effective way to solve the energy crisis and improve environmental pollution. However, renewable energy has the characteristics of discontinuity and instability, and requires energy storage devices for storage and conversion. Lithium-ion battery is an ideal energy storage device due to its advantages of high working voltage, large specific energy and environmental friendliness, and has broad application prospects. However, there are limited lithium reserves on the earth, and the large-scale development of lithium-ion batteries has gradually highlighted the shortage of lithium resources. The rising cost of lithium salts is bound to limit the development of large-scale energy stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01M4/1393H01M4/587
CPCH01M4/1393H01M4/587H01M2004/021Y02E60/10
Inventor 倪世兵张继成杨学林
Owner CHINA THREE GORGES UNIV