Three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as preparation method and application thereof

A network structure, nanomaterial technology, applied in the direction of structural parts, electrical components, electrochemical generators, etc., can solve the problem of difficult to meet high power and energy density electric vehicles, poor cycle performance and rate performance, active material pulverization, etc. problem, to achieve the effect of excellent morphology, good cycle performance, and uniform material structure

Inactive Publication Date: 2014-04-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the widely used carbon negative electrode material in lithium-ion batteries is graphite, and its theoretical capacity is 372 mA h/g. The capacity is low, and it is difficult to meet high power and energy density. The demand of electric vehicles, so, the development of new lithium-ion batteries with high discharge voltage, high capacity and longer life is the most important task
Tin-based anode materials have good electrical conductivity due to their high theoretical specific capacity

Method used

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  • Three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as preparation method and application thereof
  • Three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as preparation method and application thereof
  • Three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Called 2.5g of citric acid, 0.384g chlorine tin and 14.7G NaCl, dissolve the mixture in a 50ml derived water, stir with a magnetic mixer with a mixing speed of 300r / min, mixes and dissolved into the solution400W ultrasound ultrasound 15min, mixed uniformly.Put the mixed solution in the refrigerator and freeze overnight, and then place it in a freezing dryer in the freezer and dry until the mixture is dried.Gour the mixture, take the mixed powder of 10g in the ark, put the ark into the tube furnace, pass the 200ml / min AR inert gas for 30 minutes to eliminate the air, and then use 200ml / min H 2 In order to load gas, and increase the temperature at a temperature of 10 ° C / min to the temperature of 750 ° C, the thermal insulation is 2H carbonized reaction. After the reaction is over, it is cooled to the room temperature under the protection of the AR atmosphere to obtain the burning product.Collect the product of the burning product and study it. Washing until the product is no...

Embodiment 2

[0030]Called 2.5g of citric acid, 0.384g chlorine tin and 14.7gnaCl, dissolve the mixture in a 50ml derived water, stir with a magnetic mixer with a mixing speed of 300r / min, stir and dissolve into a solution, and then use the power to be 400W.The ultrasound ultrasound is 15min, mixed evenly.Put the mixed solution in the refrigerator and freeze overnight, and then place it in a freezing dryer in the freezer and dry until the mixture is dried.Gour the mixture, take the mixed powder of 6G in the ark, put the Ark into the tube furnace, pass the 200ml / min AR inert gas 30min to eliminate the air, and then use the 200ml / min H 2 In order to load gas, and increase the temperature at a temperature of 10 ° C / min to the temperature of 700 ° C, the thermal insulation 6h performs carbonization reactions. After the reaction is over, it is cooled to room temperature under the protection of the AR atmosphere to obtain the product of burning.Collect the product of the burnt, and study it. Washed u...

Embodiment 3

[0032] Called 2.5g of citric acid, 0.768g chlorine tin and 14.7gnacl, dissolve the mixture in a 50ml derived water, stir with a magnetic mixer with a mixing speed of 300r / min, stir and dissolve into a solution, and then use the power to be 400W.The ultrasound ultrasound is 15min, mixed evenly.Put the mixed solution in the refrigerator and freeze overnight, and then place it in a freezing dryer in the freezer and dry until the mixture is dried.Gour the mixture, take the mixed powder of 6G in the ark, put the Ark into the tube furnace, pass the 200ml / min AR inert gas 30min to eliminate the air, and then use the 200ml / min H 2 In order to load gas, and increase the temperature at a temperature of 10 ° C / min to the temperature of 800 ° C, the thermal insulation 6h performs carbonization reactions. After the reaction is over, it is cooled to room temperature under the protection of the AR atmosphere to obtain the product of burning.Collect the product of the burnt, and study it. Washed ...

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Abstract

The invention discloses a three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as a preparation method and an application thereof. The three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material is formed by uniformly loading carbon-coated tin nanometer particles on a three-dimensional graphene network. The preparation method comprises the following preparation processes: fully dissolving and mixing NaCl serving as a dispersing agent and a template with a metallic tin source and a carbon source, carrying out freeze drying, and porphyrizing, thus obtaining a mixture; putting the mixture in a tubular furnace, and calcining under the effect of hydrogen catalysis, thus obtaining a calcined product; and washing the calcined product, thus obtaining the three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material. The preparation method has the advantages that the preparation process is safe and harmless, the operation is simple, the yield is high, and when being used as an anode material for a lithium ion battery, the prepared three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material has relatively high reversible capacity and cyclic stability.

Description

Technical field [0001] The invention involves a three -dimensional graphene mesh structure load carbon covering tin nano -material, preparation and application, which belongs to the field of lithium ion secondary battery electrode materials. Background technique [0002] Lithium -ion batteries, as a secondary battery, have the advantages of high energy density, wide working range, high discharge voltage, no environmental pollution, no memory effect, etc. Compared with nickel -cadmium and nickel -metal hydride batteries, their circulation life is long and good safety performance is good.EssenceTherefore, at present, lithium -ion batteries have been widely used in portable devices such as mobile phones, cameras, cameras, laptops, etc., as one of the important energy sources in the new generation of hybrid vehicles (HEV) and pure electric vehicles (EV).It will be applied in the military fields such as satellites and aerospace. [0003] At present, the carbon negative material is wid...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/38
CPCH01M4/366H01M4/387H01M4/625H01M10/0525Y02E60/10
Inventor 何春年秦戬赵乃勤师春生刘恩佐李家俊
Owner TIANJIN UNIV
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