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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  • Abstract
  • Description
  • Claims
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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, w

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
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Example Embodiment

[0023] Example 1

[0024] (1) Cut the 0.01 mm copper foil into 3×4 cm, and put them into absolute ethanol, acetone, and deionized water respectively for 3 min ultrasonic treatment, and soak in a certain 1.0 M hydrochloric acid for 1 min to obtain several polished copper foils;

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

[0026] (3) Adjust the Sanheng reactor to output a constant current of 10 mA, graphite sheet as the cathode, high-purity copper foil as the anode, solution A as the electrolyte, react for 10 minutes, and rinse the copper foil with deionized water repeatedly. Blow dry with nitrogen to obtain product A with black active material attached to the copper foil;

[0027] (4) Put product A in argon atmosphere at 200 ℃, and anneal the temperature for 1 h to 200 ℃ for 2 h to obtain product B with attached copper sulfide.

[0028] The in-situ growth copper sulfide negative electrode material of the battery copper foil prepare...

Example Embodiment

[0030] Example 2

[0031] (1) Cut the 0.01 mm copper foil into 3×4 cm, and put them into absolute ethanol, acetone, and deionized water respectively for 3 min ultrasonic treatment, and soak in a certain 1.0 M hydrochloric acid for 1 min to obtain several polished copper foils;

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

[0033] (3) Adjust the Sanheng Reactor to make the reaction time 10 min, graphite sheet as the cathode, high-purity copper foil as the anode, solution A as the electrolyte, the reaction current is 30 mA, and the deionized water repeatedly washes the reacted copper The foil is blown dry with nitrogen to obtain product A with black active material attached to the copper foil;

[0034] (4) Put product A in argon atmosphere at 200 ℃, and anneal the temperature for 1 h to 200 ℃ for 2 h to obtain product B with attached copper sulfide.

[0035] The in-situ growth copper sulfide negative electrode material of the battery ...

Example Embodiment

[0037] Example 3

[0038] (1) Cut the 0.01 mm copper foil into 3×4 cm and put them into absolute ethanol, acetone, and deionized water for 3 minutes, respectively, ultrasonic treatment, and soak in a certain 1.0 M hydrochloric acid for 5 minutes to obtain several 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 Sanheng Reactor to make the reaction time 20 min, graphite sheet as the cathode, high-purity copper foil as the anode, solution A as the electrolyte, the reaction current is 20 mA, and deionized water repeatedly rinses the reacted copper The foil is blown dry with nitrogen to obtain product A with black active material attached to the copper foil;

[0041] (4) Put product A in argon atmosphere at 200 ℃, and anneal the temperature for 1 h to 200 ℃ for 2 h to obtain product B with attached copper sulfide.

[0042] The in-situ growth copper sulfide negative electrode material of the bat...

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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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