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Superconducting composite adhesive electrode paste, preparation method of superconducting composite adhesive electrode paste and preparation method of electrode slice of sulfur anode of superconducting lithium-sulfur battery

A technology of electrode slurry and lithium-sulfur battery, which is applied in electrode manufacturing, battery electrodes, secondary batteries, etc. It can solve the problems of health threats to workers, high toxicity, and serious environmental pollution, and achieve the effect of improving electrochemical performance

Inactive Publication Date: 2016-03-23
QINGDAO NENGXUN NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional polyvinylidene fluoride is used as a binder. Due to its high toxicity and the need to use toxic solvents, the production has a lot of pollution to the environment and poses a threat to the health of workers.

Method used

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  • Superconducting composite adhesive electrode paste, preparation method of superconducting composite adhesive electrode paste and preparation method of electrode slice of sulfur anode of superconducting lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A superconducting composite gel electrode slurry, the components and contents are shown in Table 1.

[0024] The preparation method is as follows: uniformly mix sodium alginate with gum arabic according to the formula ratio, add water to dissolve and disperse, add elemental sulfur and ketjen black, and stir until uniformly mixed.

[0025] Further preparing it into a sulfur positive electrode sheet for a superconducting lithium-sulfur battery comprises the following steps:

[0026] 1) Wash the aluminum foil with deionized water and acetone in turn, dry it, and cut it into discs with a diameter of 14mm;

[0027] 2) Pour 10-12uL of the above-mentioned slurry on the cleaned and dried aluminum foil, use a scraper with a thickness of 200-400μm to evenly coat the slurry on the rough surface of the aluminum foil, and first vacuum dry at 60°C, The drying time is 8 hours, and the drying temperature at normal pressure is 80° C., and the drying time is 2 hours, so that the positiv...

Embodiment 2

[0030] A superconducting composite gel electrode slurry, the components and contents are shown in Table 1.

[0031] Its preparation method is with embodiment 1.

[0032] The method for making the electrode sheet is the same as in Example 1.

[0033] See Table 1 for the performance test results of the lithium-sulfur battery using the electrode sheets of this implementation.

Embodiment 3

[0035] A superconducting composite gel electrode slurry, the components and contents are shown in Table 1.

[0036] Its preparation method is with embodiment 1.

[0037] The method for making the electrode sheet is the same as in Example 1.

[0038] See Table 1 for the performance test results of the lithium-sulfur battery using the electrode sheets of this implementation.

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Abstract

The present invention discloses superconducting composite adhesive electrode paste, a preparation method of the superconducting composite adhesive electrode paste, and a preparation method of an electrode slice of a sulfur anode of a superconducting lithium-sulfur battery. The present invention discloses the superconducting composite adhesive electrode paste which comprises the following components in part by weight: 1 part of sodium alginate, 0.5-3 parts of Arabic gum, 25-36 parts of water, 2-9 parts of elemental sulfur and 1-6 parts of ketjen black. According to the present invention, two types of green vegetable gum, i.e. the sodium alginate and the Arabic gum, are blended to form a binder of a cathode material of a lithium-sulfur secondary battery, which achieves twice the effect with half the effort, so that not only is electrochemical performance of the electrode material improved, but also the binder does not cause any pollution to the environment or any harm to human bodies. A test shows that according to the lithium-sulfur battery adopting the cathode material provided by the present invention, at a high discharge specific capacitance (1200mAh / g), a cycle index is over 200 times, and the capacitance still can be kept stable.

Description

technical field [0001] The invention relates to a lithium-sulfur battery cathode material, more specifically, a modified sulfur electrode material. Background technique [0002] Lithium-ion battery has the advantages of high energy density, small self-discharge, no memory effect, wide operating temperature range, long cycle life, etc. It is a secondary battery system with better comprehensive performance at present, and has been widely used in mobile phones, digital cameras and notebook computers and other portable electronic devices. However, with the continuous development of electronic electric equipment, especially the rise of electric vehicles and hybrid vehicles in recent years, traditional lithium-ion batteries have become increasingly difficult to meet people's demand for battery energy. Traditional lithium-ion battery cathode materials are mainly transition metal oxides (such as LiCoO 2 , LiMnO 2 and LiFePO 4 etc.), although it has the advantages of long cycle l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M4/04H01M10/0525
CPCH01M4/04H01M4/36H01M4/38H01M4/621H01M4/625H01M10/0525Y02E60/10
Inventor 林展刘培杨李高然高学会刘杰汪倩倩
Owner QINGDAO NENGXUN NEW ENERGY TECH CO LTD
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