Preparation method of manganese oxide/zinc oxide negative electrode material

A manganese monoxide, negative electrode material technology, applied in negative electrodes, battery electrodes, active material electrodes, etc., can solve the problems of uneven size, low yield, large skeleton, etc., to improve electrochemical stability and particle dispersion. Good, improve the effect of cycle performance

Inactive Publication Date: 2019-04-05
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method often needs to use the autoclave to carry out the high-temperature reaction for a long time, and the cost increases
The metal-organic framework derivative synthesis method is to first synthesize a metal-organic framework precursor with a high specific surface area and porosity, and an adjustable pore size, and then undergo a step of high-temperature calcination or a controllable chemical reaction to easily and conve

Method used

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  • Preparation method of manganese oxide/zinc oxide negative electrode material
  • Preparation method of manganese oxide/zinc oxide negative electrode material
  • Preparation method of manganese oxide/zinc oxide negative electrode material

Examples

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Example Embodiment

[0023] Example 1:

[0024] The preparation method of a kind of manganese monoxide / zinc oxide negative electrode material of this embodiment, its specific steps are as follows:

[0025] 1. Hydrothermal Synthesis of α-MnO 2

[0026] Weigh 0.316g of potassium permanganate and dissolve it in 30mL of deionized water, mix and stir in the container for 10 minutes, the stirring speed is 200r / min; add 3.6mL of 3mol / L hydrochloric acid, continue to stir for 5 minutes; transfer to the autoclave, Perform hydrothermal reaction at 160°C for 6 hours, centrifuge the suspended reaction solution at a speed of 10,000r / min for 5 minutes, then wash the precipitate with deionized water and absolute ethanol three times, deionized water and anhydrous The amount of ethanol is 80ml, and then dried at 60°C for 6 hours to obtain brown α-MnO 2 powder.

[0027] 2. Weigh 0.6g of dimethylimidazole and 0.3g of polyvinylpyrrolidone and dissolve them in 10mL of methanol to make solution A, the stirring sp...

Example Embodiment

[0033] Example 2:

[0034] The preparation method of a kind of manganese monoxide / zinc oxide negative electrode material of this embodiment, its specific steps are as follows:

[0035] 1. Hydrothermal Synthesis of α-MnO 2 Same as in Example 1;

[0036] 2. Weigh 0.6g of dimethylimidazole and 0.6g of polyvinylpyrrolidone and dissolve them in 10mL of methanol to make solution A, the stirring speed is 300r / min, and the stirring time is 3 minutes; weigh 0.3g of zinc nitrate and 0.04g of α-MnO 2 Dissolve in 20mL of methanol to make solution B, the stirring speed is 300r / min, and the stirring time is 3 minutes;

[0037] 3. Mix 10mL of solution A and 20mL of solution B to form solution C, and stir at room temperature for 24 hours at a stirring speed of 280r / min;

[0038] 4. Centrifuge the solution C at a speed of 11000r / min for 5 minutes, then wash the precipitate with methanol solution three times, and the amount of methanol used is 200ml;

[0039] 5. Dry the precipitate in ...

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Abstract

The invention provides a preparation method of a manganese oxide/zinc oxide negative electrode material. With potassium permanganate, water, a hydrochloric acid solution, dimethylimidazole, polyvinylpyrrolidone, methanol and zinc nitrate as raw materials, the manganese oxide/zinc oxide negative electrode material is obtained through the steps of the preparation of alpha-MnO2, the preparation of asolution A, the preparation of a solution B, the preparation of a solution C, centrifugal separation, vacuum drying and calcination. The electrode material of the invention has high purity and can beup to 99.99%, the size is small and the material is uniform, the particle dispersibility is good, no agglomeration occurs, the structure is stable, no collapse phenomenon is in the process of preparation and calcination, the product yield is high, the material has a specific structural morphology similar to a cube in a microscopic scale, and the electrochemical stability and cycle performance of amanganese oxide negative electrode material is effectively improved. The material has excellent lithium storage performance, 400 times of cycles is performed at a current density of 100 mA/g, the first discharge specific capacity is 738 mAh/g, the discharge specific capacity is 440 mAh/g and the charge specific capacity is 439 mAh/g after 200 times of cycles, and the discharge specific capacity is 561 mAh/g and the charge specific capacity is 550 mAh/g after 400 times of cycles. The preparation method is economical and simple, easy to operate, and worthy of market promotion.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a manganese monoxide / zinc oxide negative electrode material. Background technique [0002] Electrochemical energy storage is becoming increasingly important due to the development of green energy sources such as solar and wind power and the application of electric vehicles. Compared with other electrochemical energy storage systems, lithium-ion batteries have high energy density, superior cycle performance, fast charging and discharging, long service life, and environmental protection, and are considered to be the most promising energy storage devices. In order to be used in hybrid electric vehicles and electric vehicles, lithium batteries are required to have higher energy density, longer service life, and wider operating temperature window. Lithium-ion batteries are mainly composed of positive electrode, negative electrode and electrol...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/50H01M4/48H01M10/0525
CPCH01M4/362H01M4/48H01M4/50H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 柳红东林烨阮海波胡荣
Owner CHONGQING UNIV OF ARTS & SCI
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