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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  • Summary
  • 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 materials, but a single method cannot completely solve the above-mentioned key problems of tin-based anode materials

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
Comparison scheme
Effect test

Embodiment 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, 0.1849 g of SnCl 2 2H 2 O, dissolved in 75mL of water, magnetically stirred for 12h. Transfer the uniformly stirred solution into a watch glass, put it in the refrigerator to freeze, and after 24 hours, put the frozen material into a freeze dryer, and freeze-dry it at -50°C until it is completely dry. The dried powder is taken out, ground, put into the ark, and heat-treated in a tube furnace. The gas condition during heat treatment is: H 2 : Ar=250:100, with a heating rate of 20°C / min to 750°C, after holding for 2 hours, cool down to room temperature with the furnace. The obtained powder was repeatedly washed with deionized water and filtered until NaCl was completely removed. Put the washed powder in an oven to dry at 80°C, and grind to get a three-dimensional network carbon structure embedded with Cu 6 sn 5 Alloyed lithium-ion battery composite anode material, embedded Cu 6 ...

Embodiment 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, 0.2324 g SnCl 2 2H 2 O, dissolved in 75mL of water, magnetically stirred for 12h. Transfer the uniformly stirred solution into a watch glass, put it in the refrigerator to freeze, and after 24 hours, put the frozen material into a freeze dryer, and freeze-dry it at -50°C until it is completely dry. The dried powder is taken out, put into the ark, and heat-treated in a tube furnace. The heat treatment condition is: H 2 : Ar=50:100, with a heating rate of 5°C / min to 750°C, after holding for 2 hours, cool to room temperature with the furnace and take it out. The obtained material was repeatedly washed with deionized water and filtered until NaCl was completely removed. Put the washed powder in an oven and dry it at 80°C, and grind it after drying to get a three-dimensional network carbon structure embedded with Ni 3 sn 4 Carbon-lithium-ion battery composite anode material, embedde...

Embodiment 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 of water, magnetically stirred for 12h. Transfer the uniformly stirred solution into a watch glass, freeze in a refrigerator for 12 hours, put the frozen material into a freeze dryer, and freeze-dry at -50°C until completely dry. The dried powder is put into the ark and heat treated in a tube furnace. The heat treatment condition is: H 2 : Ar=250:100, heat up to 750°C at a heating rate of 10°C / min, hold for 2 hours, and cool to room temperature with the furnace. The obtained powder was repeatedly washed with deionized water and filtered until NaCl was completely removed. Put the washed powder in an oven and dry it at 80°C, and grind it to get a three-dimensional carbon network structure embedded with Ni 3 sn 4 Composite anode materials for lithium-ion batteries, embedded Ni 3 sn 4 The diameter is about 30nm, and the side length of each ...

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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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