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Copper foil in-situ growth three-dimensional copper sulfide negative electrode material for sodium-ion battery, preparation method and application

A technology for sodium ion batteries and negative electrode materials, which is applied in the manufacture of copper sulfide, battery electrodes, and secondary batteries. The effect of low cost and high controllability

Pending Publication Date: 2020-07-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the negative electrode of sodium batteries is usually coated on the copper foil by mechanically or manually mixing the negative electrode material with the binder, which may have defects such as low active material utilization rate caused by uneven mixing of active materials, and large contact resistance between active material particles.

Method used

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  • Copper foil in-situ growth three-dimensional copper sulfide negative electrode material for sodium-ion battery, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Cut the 0.01 mm copper foil into 3×4 cm, put it in absolute ethanol, acetone, and deionized water for 3 minutes, and soak it in 1.0 M hydrochloric acid for 1 minute to obtain some polished copper foils;

[0025] (2) Add 1.5 M Na 2 S 9H 2 O was dissolved in 200 ml deionized water to obtain solution A;

[0026] (3) Adjust the three-constant reaction instrument, with a constant current output of 10 mA, graphite sheet as the cathode, high-purity copper foil as the anode, solution A as the electrolyte, react for 10 min, and rinse the copper foil after the reaction with deionized water repeatedly And blow dry with nitrogen, obtain the product A that copper foil is attached with black active material;

[0027] (4) The product A was placed in argon at 200 °C, annealed for 1 h to 200 °C and kept for 2 h to obtain product B with copper sulfide attached.

[0028] The battery copper foil in-situ grown copper sulfide negative electrode material prepared by the invention is ap...

Embodiment 2

[0031] (1) Cut the 0.01 mm copper foil into 3×4 cm, put it in absolute ethanol, acetone, and deionized water for 3 minutes, and soak it in 1.0 M hydrochloric acid for 1 minute to obtain some polished copper foils;

[0032] (2) Add 1.5 M Na 2 S 9H 2 O was dissolved in 200 ml deionized water to obtain solution A;

[0033] (3) Adjust the three-constant reaction apparatus so that the reaction time is 10 min. The graphite sheet is used as the cathode, the high-purity copper foil is used as the anode, the solution A is the electrolyte, the reaction current is 30 mA, and the copper after the reaction is washed repeatedly with deionized water. foil and blown dry with nitrogen to obtain a product A with a black active substance attached to the copper foil;

[0034] (4) The product A was placed in argon at 200 °C, annealed for 1 h to 200 °C and kept for 2 h to obtain product B with copper sulfide attached.

[0035] The battery copper foil in-situ grown copper sulfide negative electro...

Embodiment 3

[0038] (1) Cut the 0.01 mm copper foil into 3×4 cm, put it in absolute ethanol, acetone, and deionized water for 3 minutes, and then soak it in 1.0 M hydrochloric acid for 5 minutes to obtain some polished copper foils;

[0039] (2) Add 1.0 M Na 2 S 9H 2 O was dissolved in 200 ml deionized water to obtain solution A;

[0040] (3) Adjust the three-constant reaction apparatus so that the reaction time is 20 min. The graphite sheet is used as the cathode, the high-purity copper foil is used as the anode, the solution A is the electrolyte, and the reaction current is 20 mA. The copper after the reaction is repeatedly washed with deionized water foil and blown dry with nitrogen to obtain a product A with a black active substance attached to the copper foil;

[0041] (4) The product A was placed in argon at 200 °C, annealed for 1 h to 200 °C and kept for 2 h to obtain product B with copper sulfide attached.

[0042] The battery copper foil in-situ grown copper sulfide negative el...

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Abstract

The invention discloses a copper foil in-situ growth three-dimensional copper sulfide negative electrode material for a sodium-ion battery, a preparation method and application. A method for preparinga copper-foil-loaded copper sulfide negative electrode material for a sodium-ion battery comprises the following steps of: taking a certain current for constant output, taking a copper foil as an anode, taking a graphite flake as a cathode and taking a solution A as an electrolyte for reaction, repeatedly washing the reacted copper foil with deionized water, drying with nitrogen to obtain a product A, and finally annealing in argon to obtain a product B; and directly tabletting the product B as a negative plate of a button cell. By preparing the in-situ grown negative plate, the use of a binder is abandoned, and an electrode active substance directly grows on a current collector, so that the active substance of the current collector is in full contact. According to the method, the manufacturing cost of the battery is reduced, the battery assembling steps are simplified, the overall energy density and the electron transmission efficiency of the battery are effectively improved, and theelectrochemical performance of the battery is greatly improved.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a preparation method and application of a three-dimensional copper sulfide negative electrode material grown in situ on copper foil for sodium ion batteries. Background technique [0002] Energy and the environment are two major problems facing today's society. With the increasing shortage of energy and the continuous deterioration of the environment, the world has fallen into the dilemma of energy shortage and environmental deterioration. The development of new energy and environmental governance are imminent. In recent years, lithium ion Batteries are widely used in various mobile electronic devices and even electric vehicles, and people's demand for lithium is increasing day by day. Compared with lithium, which is expensive and has limited storage, sodium is rich in storage, widely distributed, and low in price. What is more noteworthy is that sodium and lithium hav...

Claims

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Application Information

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IPC IPC(8): C01G3/12H01M4/58H01M10/04H01M10/054
CPCC01G3/12H01M4/5815H01M10/054H01M10/0427C01P2004/03C01P2006/40H01M2004/027Y02E60/10Y02P70/50
Inventor 杨艳玲和茹梅陈志刚朱建峰锁国权冯雷叶晓慧张荔侯小江张娜毕雅欣邹鑫鑫孙瑜陈华军
Owner SHAANXI UNIV OF SCI & TECH
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