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Graphene-doped stannic-oxide-based lithium nano battery cathode material and preparation method

A technology of tin oxide-based lithium, battery negative electrode, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as specific capacity decline, promote the integrity of eutectic phase, improve high-rate charge-discharge performance, and good solubility. Effect

Active Publication Date: 2016-08-03
江苏引潮蕴飞新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention lies in the problem that the existing graphene electrode materials are easy to gather and accumulate into a multi-layer structure during the preparation process, resulting in a decrease in its specific capacity, and then provide a graphene-doped tin oxide-based lithium nanometer The preparation method of the battery negative electrode material can effectively avoid the problem of graphene aggregation and accumulation, and the doped tin oxide-based lithium nano-battery negative electrode material can effectively improve the specific capacity and conductivity of the electrode, and improve the rate charging and cycle performance of the material

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  • Graphene-doped stannic-oxide-based lithium nano battery cathode material and preparation method
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Embodiment approach

[0025] A kind of graphene-doped tin oxide-based lithium nano-battery anode material implementation method of the present invention is as follows:

[0026] S1. A graphene oxide solution of 10-50 mg / ml is prepared by an oxidation exfoliation graphite method. Dissolve 10-25g SnCl in 100mL10-50mg / ml graphene oxide distilled aqueous solution 4 ·5H 2 O, add AMP-95 (2-amino-2-methyl-1-propanol) dropwise while stirring until the pH value is about 7-9, after standing and aging for 4-10 hours, use distilled water and ethanol respectively Wash 2-3 times, and then prepare 100ml of the above-mentioned ethanol gel containing graphene oxide;

[0027]S2. Put the gel into a 2L high-pressure reactor, fill it with 500ml of absolute ethanol, raise the temperature and pressure to 250-300°C, and the pressure is 7-9MPa. After stabilizing for 1-5 hours, release the pressure and release the fluid slowly , and then purging with nitrogen for 20-40min, take out the dry gel;

[0028] S3. Put the dried...

Embodiment 1

[0031] The preparation method of the tin oxide-based lithium nano battery negative electrode material doped with graphene in this embodiment comprises the following steps:

[0032] S1. Prepare a 20 mg / ml graphene oxide solution by using the oxidation-exfoliated graphite method. Dissolve 10 g of SnCl in 100 mL of graphene oxide distilled aqueous solution with a concentration of 20 mg / ml 4 ·5H 2 O, add AMP-95 (2-amino-2-methyl-1-propanol) dropwise while stirring until the pH value is about 8, after standing and aging for 4 hours, wash 3 times with distilled water and ethanol respectively, Then be mixed with the above-mentioned ethanol gel containing graphene oxide of 100ml;

[0033] S2. Put the gel into a 2L high-pressure reactor, fill it with 500ml of absolute ethanol, raise the temperature and pressure to 280°C, and the pressure is 7.5MPa. After stabilizing for 1 hour, release the pressure and slowly release the fluid, and then blow it with nitrogen. Sweep for 30min, take o...

Embodiment 2

[0037] The preparation method of the tin oxide-based lithium nano battery negative electrode material doped with graphene in this embodiment comprises the following steps:

[0038] S1. A graphene oxide solution of 25 mg / ml was prepared by oxidizing and exfoliating graphite. Dissolve 10 g of SnCl in 100 mL of graphene oxide distilled aqueous solution with a concentration of 20 mg / ml 4 ·5H 2 O, add AMP-95 (2-amino-2-methyl-1-propanol) dropwise while stirring until the pH value is about 8, after standing and aging for 4 hours, wash 3 times with distilled water and ethanol respectively, Then be mixed with the above-mentioned ethanol gel containing graphene oxide of 100ml;

[0039] S2. Put the gel into a 2L high-pressure reaction kettle, fill it with 500ml of absolute ethanol, raise the temperature and pressure to 285°C, and the pressure is 8MPa. After stabilizing for 1 hour, release the pressure and slowly release the fluid, and then purge with nitrogen. 30min, take out the dry...

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Abstract

The invention relates to a preparation method of a graphene-doped stannic-oxide-based lithium nano battery cathode material. The method includes the steps that firstly, SnCl4.5H2O is added to a graphene oxide aqueous solution, and a gel-shaped substance is prepared by regulating the PH value through a regulator; then a reaction is conducted in a high-temperature and high-pressure environment, after drying is conducted, calcination is conducted under the inert atmosphere, and an electrode material is obtained. According to the electrode material, a covalent bond is formed between graphene and SnCl4, the cooperative function between the graphene material and the stannic-oxide-based material is fully played, a graphene-doped stannic-oxide-based lithium battery can have high specific capacity and conductive performance, and the multiplying power charging and recycling performance of the material is greatly improved.

Description

technical field [0001] The invention relates to the field of lithium battery negative electrode materials, in particular to a graphene-doped tin oxide-based lithium nanometer battery negative electrode material and a preparation method of the material. Background technique [0002] In recent years, the domestic lithium battery industry has formed a relatively complete industrial chain through continuous development and accumulation, including upstream lithium ore resources, midstream lithium battery materials and downstream battery production. At present, my country is already the world's largest lithium-ion battery manufacturing base, and its output has accounted for more than 30% of the world's total. However, it is still at the low end of the industry chain as a whole, and there is a large gap between high-end power and energy storage batteries, which is the bottleneck restricting the development of electric vehicles in my country. Lithium-ion batteries need to continue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/362H01M4/48H01M4/625H01M10/0525Y02E60/10
Inventor 秦如新周铁生
Owner 江苏引潮蕴飞新材料有限公司
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