Preparation and application of hollow nickel disulfide ball

A disulfide and hollow technology, which is used in the preparation and application of hollow nickel disulfide balls, can solve the problems of electrode crushing, large volume expansion, poor conductivity, etc., and achieve the effects of preventing by-products, low cost, and high capacity

Pending Publication Date: 2022-05-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its conductivity is poor and it has a large volume expansion during the cycle, which is easy to cause electrode crushing.

Method used

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  • Preparation and application of hollow nickel disulfide ball
  • Preparation and application of hollow nickel disulfide ball
  • Preparation and application of hollow nickel disulfide ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) After mixing nickel chloride hexahydrate, urea and L-cysteine ​​at a molar ratio of 1:1:4, stir magnetically for 5 minutes to completely dissolve them in 20 mL of deionized water to obtain a mixed solution;

[0043] 2) Add 50 mL of deionized water into the obtained mixed solution, and ultrasonically clean it for 1 hour;

[0044] 3) Pour the solution obtained in step 2) into a 100mL polytetrafluoroethylene-lined high-temperature and high-pressure reactor, and react at 120°C for 24h;

[0045] 4) When the reaction solution in step 3) is cooled to room temperature, centrifuge at a speed of 3500r / min for 5min;

[0046] 5) Wash the centrifuged solution three times with 30mL deionized water, and then three times with 30mL ethanol solution;

[0047] 6) Put the precipitate washed in step 5) into a vacuum drying oven at 60° C. for 24 hours to dry to obtain the product hollow nickel disulfide balls.

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Abstract

The invention discloses preparation and application of hollow nickel disulfide balls, and belongs to the technical field of novel energy materials. According to the invention, nickel chloride hexahydrate, urea and L-cysteine are used as raw materials, and a simple hydrothermal method is adopted to prepare the nickel chloride hexahydrate-urea-L-cysteine composite material. When the hollow nickel disulfide ball material is applied to the negative electrode of the lithium ion battery, the electron and ion mobility of the negative electrode material in the charging and discharging process can be improved, so that the cycle performance and the rate capability of the battery are improved; in addition, the material can prevent generation of byproducts, and the hollow structure of the material can also improve the rate capability of the battery by adapting to volume shrinkage and expansion in the cycle process.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to the preparation and application of a hollow nickel disulfide ball. Background technique [0002] The widespread use of fossil fuels has not only caused an energy crisis, but also caused environmental pollution. It has become a major trend to find clean energy to replace fossil fuels to reduce dependence on fossil fuels. In recent years, lithium-ion batteries, as an emerging clean energy, rely on Its high specific capacity, good working stability, and wide working temperature range have become one of the preferred choices for automotive batteries. However, the lack of suitable anode materials limits the development of lithium-ion batteries. Among many non-carbon anode materials, metal sulfides, as anode materials with redox mechanisms, have high first-cycle Coulombic efficiency and theoretical specific capacity, and are considered to be the most promising...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/0525C01G53/11
CPCH01M4/5815H01M10/0525C01G53/11H01M2004/027C01P2004/34
Inventor 成伟翔闵永刚
Owner GUANGDONG UNIV OF TECH
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