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Preparation method and application of safe and efficient potassium metal electrode material

A metal electrode, high-efficiency technology, applied in battery electrodes, alkali metal compounds, chemical instruments and methods, etc., can solve problems such as poor stability, potential safety hazards, fire, etc., achieve high repetition rate, improve safety, and convenient preparation methods Effect

Pending Publication Date: 2021-06-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal potassium has extremely high reactivity and poor stability. Due to accidents such as external force or failure of the potassium metal battery, the internal potassium metal will undergo violent chemical reactions with oxygen and water in the surrounding environment. , causing fire or even explosion, there is a great potential safety hazard in the process of practical application

Method used

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  • Preparation method and application of safe and efficient potassium metal electrode material
  • Preparation method and application of safe and efficient potassium metal electrode material
  • Preparation method and application of safe and efficient potassium metal electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) Under the protection of argon, put 2.46g of dried natural graphite into the crucible container, raise the temperature to 350°C and keep stirring for 1min, so that the carbon material is heated evenly;

[0035] 2) Under the protection of argon, put 1 g of metal potassium after removing the oxide film into a crucible and mix it with the carbon material, and stir continuously at 350° C. to make the reaction continue. After stirring for 10 minutes, the potassium carbon compound is prepared;

[0036] 3) Under the protection of argon, the potassium carbon compound powder was pressed at a pressure of 0.5 t for 1 min to prepare a potassium carbon compound sheet, and a safe and efficient negative electrode material for a potassium metal battery was obtained.

Embodiment 2

[0039] 1) Under the protection of nitrogen gas, put 2.46g of dried natural graphite into the crucible container, raise the temperature to 350°C and keep stirring for 1min, so that the carbon material is heated evenly;

[0040] 2) Under the protection of nitrogen gas, put 1 g of metal potassium after removing the oxide film into a crucible and mix it with carbon materials, and stir continuously at 350°C to make the reaction continue to occur. After stirring for 10 minutes, a potassium carbon compound is prepared;

[0041] 3) Under the protection of nitrogen, the potassium carbon compound powder is coated on the copper sheet to prepare the potassium carbon compound electrode, and a safe and efficient negative electrode material for the potassium metal battery is obtained.

Embodiment 3

[0043] 1) Under the protection of argon gas, put 4.92g of dried natural graphite into the crucible container, raise the temperature to 350°C and keep stirring for 1min, so that the carbon material is heated evenly;

[0044] 2) Under the protection of argon gas, put 1 g of metal potassium after removing the oxide film into a crucible and mix it with the carbon material, and stir continuously at 350°C to make the reaction continue. After stirring for 10 minutes, the potassium carbon compound is prepared;

[0045]3) Under the protection of argon, the potassium carbon compound powder was held at a pressure of 0.2 t for 1 min to prepare a potassium carbon compound sheet, and a safe and efficient negative electrode material for a potassium metal battery was obtained.

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Abstract

The invention discloses a preparation method of a safe and efficient potassium metal electrode material and application of the safe and efficient potassium metal electrode material as a potassium metal battery negative electrode material. According to the preparation method, potassium carbon compound powder can be obtained in one step through simple heating and stirring processes, and the safe and efficient potassium metal battery negative electrode material is further prepared. The reaction of the electrode with oxygen and water has better stability and safety than metal potassium, after the electrode is assembled into a battery, the metal potassium does not exist, the safety performance of the potassium metal battery is effectively improved while normal operation is ensured, the operation is simple, the repeatability is good, and large-scale commercial application of the potassium metal battery is facilitated.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for potassium metal secondary batteries, in particular to a preparation method of a safe and efficient potassium metal electrode material and its application as a negative electrode material for potassium metal batteries. Background technique [0002] With the advancement and development of science and technology, realizing safe, economical, environmentally friendly and sustainable energy storage devices has become a major scientific challenge in the 21st century. At present, lithium-ion batteries have been successfully used as energy storage devices in portable electronic devices and electric vehicles in daily life. However, due to their limited energy density (typically ≤250W h kg -1 ), commercial lithium-ion batteries based on graphite anodes are no longer able to meet the long driving range requirements of electric vehicles. Therefore, developing other alternative second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/38H01M10/054C01D13/00
CPCH01M4/381H01M10/054H01M4/134H01M4/1395C01D13/00Y02E60/10
Inventor 张家恒李玉倩朱丽萍涂江平
Owner ZHEJIANG UNIV
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