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Max phase material for lithium ion battery anode and preparation method thereof

A lithium-ion battery and anode technology, applied in the field of materials, can solve problems such as limiting the practical application of MXene electrodes, and achieve excellent cycle stability and charge-discharge reversibility, simple synthesis method, and small particle size.

Active Publication Date: 2022-04-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dangerous etchant (such as HF) and the complexity of the process used to prepare MXene limit better practical applications of MXene electrodes.

Method used

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  • Max phase material for lithium ion battery anode and preparation method thereof
  • Max phase material for lithium ion battery anode and preparation method thereof
  • Max phase material for lithium ion battery anode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: In this embodiment, the MAX phase material used for the lithium-ion battery anode is V 2SnC powder material, raw materials are V powder, Sn powder, graphite, inorganic salts are NaCl and KCl, and these raw materials can be obtained through commercial channels. The V 2 The preparation method of SnC powder is as follows:

[0038] (1) Mix V powder, Sn powder, graphite and inorganic salt (sodium chloride, potassium chloride) in a molar ratio of 2:1:1:0, grind and mix the above materials to obtain a mixed product.

[0039] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 600°C, 60 minutes, under the protection of argon. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0040] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, s...

Embodiment 2

[0043] Embodiment 2: In this embodiment, the MAX phase material used for the lithium-ion battery anode is V 2 SnC powder material, raw materials are V powder, Sn powder, graphite, inorganic salts are NaCl and KCl, and these raw materials can be obtained through commercial channels. The V 2 The preparation method of SnC powder is as follows:

[0044] (1) Mix V powder, Sn powder, graphite and inorganic salt (sodium chloride, potassium chloride) in a molar ratio of 3:3:2:8, grind and mix the above materials to obtain a mixed product.

[0045] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 1000°C, 720 minutes, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0046] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir ...

Embodiment 3

[0048] Embodiment 3: In this embodiment, the MAX phase material used for lithium-ion battery anode is V 2 SnC powder material, raw materials are V powder, Sn powder, graphite, inorganic salts are NaBr and KBr, and these raw materials can be obtained through commercial channels. The V 2 The preparation method of SnC powder is as follows:

[0049] (1) Mix V powder, Sn powder, graphite and inorganic salt (sodium chloride, potassium chloride) in a molar ratio of 3:1:2:4, grind and mix the above materials to obtain a mixed product.

[0050] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 800°C, 420 minutes, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0051] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir and u...

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Abstract

The invention discloses a MAX phase material used for lithium ion battery anodes and a preparation method thereof. The chemical formula of the MAX phase material used for lithium ion battery anode is M n+1 AX n , where M includes any one or a combination of two or more of Sc, Ti, V, Zr, Nb, Mo, Hf, A is Sn element, X is C element and / or N element, n is 1, 2, 3 or 4. The MAX phase material has a hexagonal crystal structure, and the unit cell consists of M n+1 x n The units are stacked alternately with Sn atoms. The MAX phase material obtained by the present invention can provide 390 mAhg ‑1 (0.1Ag ‑1 ) Li-ion storage capacity, after 1000 cycles (1Ag ‑1 ) still maintains 90% capacity, the coulombic efficiency is close to 100%, has excellent cycle stability and charge-discharge reversibility, and has great application potential in the field of high-performance lithium-ion batteries.

Description

technical field [0001] The invention relates to a composite inorganic material, in particular to a MAX phase material used for the anode of a lithium ion battery and a preparation method thereof, and belongs to the field of material technology. Background technique [0002] As the most commonly used electrical energy storage device, lithium-ion batteries have attracted widespread attention due to their high energy density, high operating voltage, and low self-discharge. Despite the rapid development of lithium-ion batteries, to meet different energy service environments, higher requirements are put forward for lithium-ion batteries with high energy density, high power output, and long life. The MAX phase is a class of nanolayered transition metal compounds ternary metal carbides and / or nitrides with a hexagonal lattice structure, whose general formula is M n+1 AX n , where M is a transition metal, A is mainly a main group element, X is carbon and / or nitrogen, and n is usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525
CPCH01M4/58H01M10/0525H01M2004/028H01M2004/021Y02E60/10
Inventor 黄庆李友兵李勉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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