Battery anode material of embedding Sn-based alloy in porous carbon and preparation method of the battery anode material

A technology of tin-based alloy and battery negative electrode, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as tin-based negative electrode materials that cannot be completely solved, and achieve excellent conductivity, lithium storage function, buffer volume change, and structure stable effect

Inactive Publication Date: 2018-10-23
东北大学秦皇岛分校
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above three modification methods have certain effects on improving the performance of tin-based anode mater

Method used

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  • Battery anode material of embedding Sn-based alloy in porous carbon and preparation method of the battery anode material
  • Battery anode material of embedding Sn-based alloy in porous carbon and preparation method of the battery anode material
  • Battery anode material of embedding Sn-based alloy in porous carbon and preparation method of the battery anode material

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] Weigh 2.5g of C 6 H 8 O 7 ·H 2 O, 20.7g of NaCl, 0.2339g of Cu(NO 3 ) 2 ·3H 2 O, 0.1849g of SnCl 2 ·2H 2 O, dissolved in 75mL water, magnetically stirred for 12h. Transfer the evenly stirred solution into a watch glass and freeze it in the refrigerator. After 24 hours, put the frozen material in a freeze dryer and freeze-dry it at -50°C until it is completely dry. Take out the dried powder, grind it, put it in an ark, and heat it in a tube furnace. The gas conditions during heat treatment are: H 2 :Ar=250:100, with a heating rate of 20°C / min to 750°C, after holding for 2h, cool to room temperature with the furnace. The obtained powder is repeatedly washed and filtered with deionized water until the NaCl is completely removed. Put the washed powder in an oven and dry it at 80°C, and grind it to obtain a three-dimensional network carbon structure with embedded Cu 6 Sn 5 Alloy composite anode material for lithium-ion battery with embedded Cu 6 Sn 5 The di...

Example Embodiment

[0041] Example 2

[0042] Weigh 2.5g of C 6 H 8 O 7 ·H 2 O, 20.7g of NaCl, 0.2258g of Ni(NO 3 ) 2 ·6H 2 O, 0.2324g of SnCl 2 ·2H 2 O, dissolved in 75mL water, magnetically stirred for 12h. Transfer the evenly stirred solution into a watch glass and freeze it in the refrigerator. After 24 hours, put the frozen material into a freeze dryer and freeze-dry it at -50°C until it is completely dry. Take out the dried powder, put it in an ark, and heat it in a tube furnace. The heat treatment conditions are: H 2 :Ar=50:100, the temperature is increased to 750°C at a heating rate of 5°C / min, after holding for 2h, it is taken out after being cooled to room temperature with the furnace. The obtained material was repeatedly washed and filtered with deionized water until the NaCl was completely removed. Put the washed powder in an oven and dry it at 80°C, and then grind after drying to obtain a three-dimensional network carbon structure with Ni embedded 3 Sn 4 Composite anode material for c...

Example Embodiment

[0044] Example 3

[0045] Weigh 2.5g of C 6 H 8 O 7 ·H 2 O, 20.7g of NaCl, 0.3662 of Ni(NO 3 ) 2 ·6H 2 O, 0.1627g SnCl 2 ·2H 2 O, dissolved in 75mL water, magnetically stirred for 12h. Transfer the evenly stirred solution into a watch glass, put it in the refrigerator and freeze for 12 hours, put the frozen material in a freeze dryer, freeze-dry it at -50°C until it is completely dry. Put the dried powder into the ark and heat it in a tube furnace. The heat treatment conditions are: H 2 : Ar=250:100, the temperature is increased to 750°C at a rate of 10°C / min, the temperature is kept for 2h, and the furnace is cooled to room temperature. The obtained powder is repeatedly washed and filtered with deionized water until the NaCl is completely removed. Put the washed powder in an oven and dry it at 80℃, and then grind it to obtain a three-dimensional carbon network structure with Ni embedded 3 Sn 4 Lithium-ion battery composite anode material with Ni embedded 3 Sn 4 The diameter is...

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Abstract

The invention discloses a battery anode material of embedding Sn-based alloy in porous carbon and a preparation method of the battery anode material. The composite material is formed by uniformly embedding nano Sn-based alloy, coated by three-dimensional network porous carbon, into a three-dimensional network carbon structure. The preparation method includes steps of: dissolving NaCl, as a template, with a carbon source, a tin source, and other metal salts, uniformly mixing the components, and freeze-drying the mixture to maintain the cubic structure of NaCl; grinding the mixture, performing thermal treatment in a tubular furnace at certain temperature in an inert gas or reductive atmosphere, and washing the product to remove the NaCl template; drying the product to obtain the composite material. The material, as an anode in lithium ion or sodium ion batteries, is high in capacity, good in cycle performance and excellent in rate capability; the preparation method is simple, is environment-friendly and performance-controllable, and has universality and can be scaled-up.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode materials, and relates to a lithium and sodium ion battery negative electrode material technology, in particular to a battery negative electrode material with porous carbon embedded tin-based alloy and a preparation method thereof. Background technique [0002] Because of its high specific energy, wide operating temperature range, long storage life, no environmental pollution, and safe use, lithium-ion batteries have been widely used in various small electronic devices, such as mobile phones, notebook computers, cameras, power tools, etc. , and also plays an important role in the fields of electric vehicles and large-scale energy storage. [0003] The performance of lithium-ion batteries mainly depends on the performance of positive and negative electrode materials. The current anode materials for lithium-ion batteries are mainly carbon materials, but their theoretical specific...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525H01M10/054
CPCH01M4/362H01M4/387H01M4/62H01M4/625H01M4/628H01M10/0525H01M10/054Y02E60/10
Inventor 王志远罗绍华董康泽王丹王庆张亚辉刘延国郝爱民
Owner 东北大学秦皇岛分校
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