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Preparation methods of transition metal carbide, carbon material and transition metal chalcogenide and application of transition metal chalcogenide

A technology of chalcogenides and transition metals, which is applied in the preparation of carbon materials, transition metal chalcogenides, and transition metal carbides, can solve the problems of poor rate capability, short cycle life, and fast capacity decay of the tested battery, and achieve Strong adsorption energy, extended cycle life, and reduced swelling

Active Publication Date: 2020-03-27
河北华普化工设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, transition metal chalcogenides are considered to be promising anodes for alkali metal ion batteries due to their ultra-high electrical conductivity, excellent chemical stability, and will not be decomposed during the reaction, reducing the occurrence of side reactions. However, due to the large radius and volume of potassium ions and sodium ions, the intercalation and deintercalation of potassium ions and sodium ions in the process of charge and discharge will make the negative electrode material expand, which will lead to poor rate capability of the tested battery, fast capacity decay, and cycle short lifespan

Method used

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  • Preparation methods of transition metal carbide, carbon material and transition metal chalcogenide and application of transition metal chalcogenide
  • Preparation methods of transition metal carbide, carbon material and transition metal chalcogenide and application of transition metal chalcogenide
  • Preparation methods of transition metal carbide, carbon material and transition metal chalcogenide and application of transition metal chalcogenide

Examples

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Embodiment 1

[0031] A preparation method of transition metal carbides, comprising the steps of:

[0032] Disperse 1g of polyvinylpyrrolidone and 1g of ferric nitrate hexahydrate in deionized water, stir at 25°C for 2h to obtain a uniform solution, and then put the solution in a drying oven at 60°C for 24h to obtain a colloidal precursor. Put it into a corundum boat, pass Ar protective atmosphere in a tube sintering furnace, and sinter at 700 ° C for 3 hours to obtain iron carbide.

[0033] The above-mentioned iron carbide is used to prepare carbon materials, and the specific preparation method is as follows:

[0034] The iron carbide was pickled with 1M hydrochloric acid, washed with deionized water, and dried to obtain a porous carbon material. The porous carbon material can be used in lithium-ion batteries.

[0035] The above-mentioned iron carbide is used to prepare iron chalcogen compounds, and the specific preparation method is as follows:

[0036] 1g of iron carbide and 1g of sele...

Embodiment 2

[0038] A preparation method of transition metal carbides, comprising the steps of:

[0039] Disperse 9 g of agar gel and 5 g of cobalt nitrate hexahydrate in deionized water, stir at 45 ° C for 1 h to obtain a uniform solution, then put the solution in a drying oven at 70 ° C for 18 h to obtain a colloidal precursor, put the precursor in Put it into a corundum boat, pass Ar protective atmosphere in a tubular sintering furnace, and sinter at 900 ° C for 1 hour to obtain cobalt carbide.

[0040] The above-mentioned cobalt carbide is used to prepare carbon materials, and the specific preparation method is as follows:

[0041] The cobalt carbide was pickled with 1M sulfuric acid, washed with deionized water, and dried to obtain a porous carbon material. The porous carbon material can be used in lithium-ion batteries.

[0042] The above-mentioned cobalt carbide is used to prepare cobalt chalcogenides, and the specific preparation method is as follows:

[0043] Grind and mix 2g o...

Embodiment 3

[0045] A preparation method of transition metal carbides, comprising the steps of:

[0046] Disperse 3g of polyvinylpyrrolidone and 9g of copper nitrate hexahydrate in deionized water, stir at 30°C for 3h to obtain a uniform solution, and then put the solution in a drying oven at 90°C for 12h to obtain a colloidal precursor. Put it into a corundum boat, pass through an Ar protective atmosphere in a tubular sintering furnace, and sinter at 500 ° C for 5 hours to obtain copper carbide.

[0047] The above-mentioned copper carbide is used to prepare carbon materials, and the specific preparation method is as follows:

[0048] The copper carbide was pickled with 1M nitric acid, washed with deionized water, and dried to obtain a porous carbon material. The porous carbon material can be used in lithium-ion batteries.

[0049] The above-mentioned copper carbide is used to prepare copper chalcogenides, and the specific preparation method is as follows:

[0050]Grind and mix 3g of ir...

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Abstract

The invention relates to the technical field of alkali metal ion batteries and particularly discloses preparation methods of transition metal carbide, a carbon material and transition metal chalcogenide and the application of the transition metal chalcogenide. The preparation methods of the transition metal carbide comprises the following steps of dispersing a carbon source and a transition metalsoluble salt in deionized water, drying to obtain a precursor, sintering to obtain the transition metal carbide, and applying the transition metal carbide to the preparation of the carbon material andthe transition metal chalcogenide. The transition metal chalcogenide provided by the invention has a larger specific surface area, and moreover, the multi-electron conversion reaction can be carriedout with sodium ions or potassium ions, the high-efficiency adsorption and intercalation of the sodium ions or potassium ions can be realized, the expansion of a negative electrode material is effectively reduced, the rate capability and specific capacity of a battery are improved, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of alkali metal ion batteries, in particular to a preparation method and application of transition metal carbides, carbon materials and transition metal chalcogen compounds. Background technique [0002] Sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) are a new class of electrochemical power sources. In recent years, sodium-ion batteries and potassium-ion batteries have attracted widespread attention due to the advantages of abundant resource reserves and low raw material prices, and are expected to become substitutes. A new generation of batteries for lithium-ion batteries (LIBs). However, because the radius of sodium ions and potassium ions is larger than that of lithium ions, many electrode materials suitable for lithium-ion batteries cannot achieve the deintercalation of sodium ions and potassium ions well. Therefore, the development of electrode materials with excellent electrochemical pe...

Claims

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Application Information

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IPC IPC(8): C01B32/914C01B19/04C01G51/00H01M4/58H01M4/583H01M4/587H01M10/0525H01M10/054
CPCC01B19/007C01G51/30C01P2002/72C01P2004/03C01B32/914H01M4/581H01M4/583H01M4/587H01M10/0525H01M10/054Y02E60/10
Inventor 王波王伟李冲张迪王秋君李文
Owner 河北华普化工设备科技有限公司
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