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Nickel oxide/porous carbon material capable of being used for lithium ion battery negative electrode as well as preparation method and application of nickel oxide/porous carbon material

A lithium-ion battery and porous carbon technology, which is applied to battery electrodes, secondary batteries, electrochemical generators, etc., can solve problems such as lifting, metal oxide shedding, and uneven distribution of nickel oxide, so as to achieve rich raw materials and reliable The effect of strong controllability and excellent lithium battery performance

Inactive Publication Date: 2020-03-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most common preparation method of nickel oxide / carbon-based composites is to combine the precursor of nickel with carbon materials by impregnation method and perform air roasting at high temperature, but the interaction between nickel oxide and carbon materials prepared by this method is relatively weak. , during the charge and discharge process, the metal oxide will fall off from the surface of the carbon material
Moreover, the large particles of nickel oxide are not evenly distributed, and the simple surface loading makes the carbon material unable to well suppress the volume expansion of nickel oxide during charging and discharging, which is not conducive to the improvement of the performance of lithium-ion batteries.

Method used

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  • Nickel oxide/porous carbon material capable of being used for lithium ion battery negative electrode as well as preparation method and application of nickel oxide/porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A mixture of 2 mmol of nickel nitrate, 0.5 mmol of terephthalic acid, and 1.5 mmol of trimesic acid was dissolved in 40 mL of DMF, labeled as solution A. Then the solution was put into a hydrothermal kettle and reacted at 120 °C for 8 h to obtain Ni-MOFs. The product was rinsed three times with ethanol and dried at 50 °C for 12 h. Put the dried Ni-MOFs in a porcelain ark into a tube furnace, raise the temperature to 700°C at 2°C / min in an argon atmosphere, and react for 1h to obtain a nickel / porous carbon material, then place it in an air atmosphere Rise to 250°C at 2°C / min, and react for 1 hour to obtain nickel oxide / porous carbon material.

Embodiment 2

[0022] Dissolve a mixture of 3 mmol of nickel nitrate, 0.1 mmol of 1, 2, 2, and 1.9 mmol of trimesic acid in 40 mL of DMF, labeled as solution A. Then the solution was put into a hydrothermal kettle and reacted at 130 °C for 9 h to obtain Ni-MOFs. The product was rinsed three times with ethanol and dried at 50 °C for 12 h. The dried Ni-MOFs were placed in a porcelain ark and placed in a tube furnace, heated to 800°C at 2°C / min in an argon atmosphere, and reacted for 2h to obtain a nickel / porous carbon material, which was then placed in an air atmosphere Rise to 300°C at 2°C / min and react for 2h to obtain nickel oxide / porous carbon material.

Embodiment 3

[0024] A mixture of 3 mmol of nickel nitrate, 0.2 mmol of terephthalic acid and 1.8 mmol of trimesic acid was dissolved in 40 ml of DMF, labeled as solution A. Then the solution was put into a hydrothermal kettle and reacted at 140 °C for 10 h to obtain Ni-MOFs. The product was rinsed three times with ethanol and dried at 50 °C for 12 h. Put the dried Ni-MOFs in a porcelain ark into a tube furnace, raise the temperature to 900°C at 2°C / min in an argon atmosphere, and react for 3h to obtain a nickel / porous carbon material. Raise to 300°C at 2°C / min, react for 1h, and obtain nickel oxide / porous carbon material.

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Abstract

The invention belongs to the technical field of material preparation, and relates to a nickel oxide / porous carbon material capable of being used for a lithium ion battery negative electrode, and a preparation method and application of the nickel oxide / porous carbon material. The preparation method comprises the following steps of mixing terephthalic acid, trimesic acid and nickel nitrate in DMF, reacting in a hydrothermal kettle, and washing and drying the reacted product with ethanol; and enabling a completely dried sample to carry out high-temperature reaction in a tubular furnace in the atmosphere of introducing argon, enabling a cooled product to carry out high-temperature reaction in the air atmosphere to obtain the nickel oxide / porous carbon. The method provided by the invention is environment-friendly and high in preparation operation controllability, the nickel oxide nanoparticles are uniformly dispersed in the porous carbon, and the excellent lithium ion battery performance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a nickel oxide / porous carbon material that can be used for a negative electrode of a lithium ion battery, a preparation method and an application thereof. Background technique [0002] Due to the depletion of traditional fossil energy and the emission of harmful gases in the use of fossil energy, energy and environmental issues have become increasingly prominent. The application of new energy can utilize the electric energy converted from clean energy such as wind energy or solar energy, which is considered to be one of the effective strategies to solve energy and environmental problems. Among many energy storage and conversion devices, lithium-ion batteries have a wide range of applications due to their high energy density and power density. As an important part of lithium-ion batteries, negative electrode materials directly affect the energy density, cycle life and ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M4/131H01M10/0525
CPCH01M4/131H01M4/362H01M4/523H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 张旭曲宁杨仕轩范秋雨雷达
Owner DALIAN UNIV OF TECH
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