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Preparation method for graphene-lithium composite electrode material

A composite electrode and graphene technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of unsatisfactory Coulombic efficiency and cycle stability, and the influence of specific capacity surface state, so as to improve capacity utilization and charge and discharge performance The effect of enhancing and increasing the conductivity

Inactive Publication Date: 2017-05-10
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when it is used alone as an electrode material for lithium batteries, its initial Coulombic efficiency and cycle stability are not ideal, and its actual specific capacity is often greatly affected by the surface state. Promising application direction

Method used

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  • Preparation method for graphene-lithium composite electrode material
  • Preparation method for graphene-lithium composite electrode material
  • Preparation method for graphene-lithium composite electrode material

Examples

Experimental program
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Embodiment 1

[0029] This embodiment relates to a method for preparing an improved organic quinone compound / conductive polymer / graphene lithium battery positive electrode, the method comprising the following steps:

[0030] Step 1, premix 0.1435g of sulfonate of phenanthrenequinone sulfonate with 100mL of deionized water, stir at room temperature until the raw material is completely dissolved, and record it as solution A;

[0031] Step 2, premix 0.2g graphene oxide with 100mL deionized water, stir at room temperature until the raw materials are completely dissolved, and record it as solution B;

[0032] Step 3, take 3.75mL of solution A and 3.75mL of solution B, stir at room temperature until completely mixed, and record it as mixed solution C;

[0033] Step 4, drop 0.1005 g of pyrrole into the mixed solution C while stirring to obtain a dark yellow solution E;

[0034] Step 5, using stainless steel mesh as the counter electrode, at 0.5mA / cm 2 After 40 minutes of galvanostatic deposition ...

Embodiment 2

[0038] This embodiment relates to a method for preparing an improved organic quinone compound / conductive polymer / graphene lithium battery positive electrode, the method comprising the following steps:

[0039] Step 1, premix 0.1435g of sulfonate of phenanthrenequinone sulfonate with 100mL of deionized water, stir at room temperature until the raw material is completely dissolved, and record it as solution A;

[0040] Step 2, premix 0.2g graphene oxide with 100mL deionized water, stir at room temperature until the raw materials are completely dissolved, and record it as solution B;

[0041] Step 3, take 3.75mL of solution A and 1.875mL of solution B, stir at room temperature until completely mixed, and record it as mixed solution C;

[0042] Step 4, drop 0.0646g of pyrrole into the mixed solution C while stirring to obtain a dark yellow solution E;

[0043] Step 5, using stainless steel mesh as the counter electrode, at 0.5mA / cm 2After 60 minutes of galvanostatic deposition a...

Embodiment 3

[0047] This embodiment relates to a method for preparing an improved organic quinone compound / conductive polymer / graphene lithium battery positive electrode, the method comprising the following steps:

[0048] Step 1, premix 0.1435g of sulfonate of phenanthrenequinone sulfonate with 100mL of deionized water, stir at room temperature until the raw material is completely dissolved, and record it as solution A;

[0049] Step 2, premix 0.2g graphene oxide with 100mL deionized water, stir at room temperature until the raw materials are completely dissolved, and record it as solution B;

[0050] Step 3, take 3.75mL of solution A and 7.5mL of solution B, stir at room temperature until completely mixed, and record it as mixed solution C;

[0051] Step 4, drop 0.0861g of pyrrole into the mixed solution C while stirring to obtain a dark yellow solution E;

[0052] Step 5, using stainless steel mesh as the counter electrode, at 1mA / cm 2 After 40 minutes of galvanostatic deposition at a...

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Abstract

The invention relates to a preparation method for a graphene-lithium composite electrode material, in particular to a method for manufacturing an organic matter / inorganic matter composite electrode at one step by using an electrochemical deposition method. In the method, the electrode material having a three-dimensional microstructure is prepared by using the high specific capacity of a quinone compound, the capacity of a conductive compound, rapid reaction dynamics and the superior conductivity of graphene under the condition of no need of adding any additive, so that the charging and discharging performance of the electrode material is enhanced.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for preparing a graphene lithium composite electrode material. Background technique [0002] In recent years, the issue of energy storage has always been the focus of scientific research and practice. With the increasing popularity of electronic products such as mobile phones and the sound development of the electric vehicle market, people's demand for clean, efficient and safe energy storage devices continues to rise. Lithium-ion batteries have entered the commercial application stage since the 1990s, and are widely used in various industrial and commercial fields due to their competitive advantages such as high capacity, high voltage platform, and environmental friendliness. At present, the focus of scientific research on lithium batteries mainly covers improving capacity and safety, improving service life, and mechanical properties. Among the many factors affect...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M4/139H01M4/04H01M10/0525
CPCH01M4/0457H01M4/139H01M4/362H01M4/60H01M4/602H01M4/606H01M4/624H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 何丹农王严张春明吴晓燕段磊
Owner SHANGHAI JIAO TONG UNIV
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