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Organic negative electrode material of potassium ion battery and preparation method of organic negative electrode material

A technology of organic negative electrode and negative electrode material, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of few negative electrode materials, potential safety hazards, easy formation of dendrites, etc., and achieve high specific capacity, stable structure, and high Coulombic efficiency. Effect

Active Publication Date: 2017-02-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few anode materials for potassium-ion batteries reported so far, among which carbon materials have low potassium-deintercalation potential and are prone to form dendrites, causing safety hazards.

Method used

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  • Organic negative electrode material of potassium ion battery and preparation method of organic negative electrode material
  • Organic negative electrode material of potassium ion battery and preparation method of organic negative electrode material
  • Organic negative electrode material of potassium ion battery and preparation method of organic negative electrode material

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Embodiment 1

[0034] A preparation method of an organic negative electrode material for a potassium ion battery, comprising the following steps:

[0035] (1) Weigh 2 g of terephthalic acid with a purity of 99% and 3.05 g of analytically pure KOH, and then add them to a flask filled with 40 mL of deionized water, and stir for 1 h with a magnetic stirrer;

[0036] (2) Transfer the reaction solution obtained in step (1) into a polytetrafluoroethylene liner, seal it in a reaction kettle, and react at 110° C. for 72 hours;

[0037] (3) Measure 20 mL of the reaction product obtained in step (2), add 50 mL of absolute ethanol to obtain a white precipitate, then centrifuge, wash with deionized water for more than 3 times, dry the obtained solid at 60 ° C for 8 h, and then dry it at 110 ° C Vacuum-dried for 6 hours to obtain an organic potassium terephthalate negative electrode material.

[0038] Potassium terephthalate (K 2 TP) as a potassium ion anode material, its reversible deintercalation mec...

Embodiment 2

[0047] A preparation method of an organic negative electrode material for a potassium ion battery, comprising the following steps:

[0048] (1) Weigh 2 g of pyridine-2,5-dicarboxylic acid with a purity of 99% and 3.05 g of analytically pure KOH, mix them, then add them to a flask filled with 40 mL of deionized water, and stir for 1 h with a magnetic stirrer;

[0049] (2) Transfer the reaction solution obtained in step (1) into a polytetrafluoroethylene liner, seal it in a reaction kettle, and react at 110° C. for 72 hours to obtain a clear solution;

[0050] (3) Measure 20 mL of the reaction product obtained in step (2), add 50 mL of absolute ethanol to obtain a white precipitate, then centrifuge, wash with deionized water for more than 3 times, dry the obtained solid at 80 ° C for 6 h, and then dry it at 120 ° C Dry in vacuum for 6h to get potassium pyridine-2,5-dicarboxylate (K 2 C 7 h 3 NO 4 ) anode material.

[0051] Potassium pyridine-2,5-dicarboxylate is used as a n...

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Abstract

The invention provides a novel organic negative electrode material of a potassium ion battery. An active substance of the novel organic negative electrode material is an organic carboxylic potassium salt. A preparation method of the novel organic negative electrode material comprises the steps of firstly performing ultrasonic mixing of a carboxylic acid-containing organic matter and potassium hydroxide; performing sealing reaction for 24-72 hours at 100-120 DEG C, adding a solvent to make the mixture precipitated; and finally, performing centrifuging, washing and drying to obtain the novel organic negative electrode material. The negative electrode material shows a reversible potassium ion de-intercalation platform and excellent cycle performance and is provided with an excellent potassium ion and electron transmission channel, a crystal structure is stable in an electrolyte, the synthesis method is simple, green and environmental-friendly, and a flexible battery can be prepared. By such type of potassium ion battery, the problems of resource shortage of an electrode material of the lithium ion battery, environmental pollution caused by usage of transition metal and the like can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of ion batteries, and in particular relates to a novel organic negative electrode material for potassium ion batteries and a preparation method thereof. Background technique [0002] With the continuous development of modern society and the advancement of science and technology, traditional fossil energy such as coal, oil, natural gas, etc. have limited resources and cause environmental pollution and other disadvantages. Therefore, problems such as energy crisis and environmental pollution have become increasingly prominent. It is far from meeting the requirements of human beings for building a green and clean energy society. What follows is based on new technology and new materials, so that the modern development and utilization of traditional renewable resources can effectively solve the above situation. There are various new energy sources available for development, such as wind energy, nuclear energy, s...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/60
CPCH01M4/60H01M10/0525Y02E60/10
Inventor 李晶泽邓七九马婧樊聪王丽平
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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