A kind of preparation method and application of hollow spherical nickel sulfide positive electrode material

A positive electrode material, nickel sulfide technology, applied in the direction of battery electrodes, electrochemical generators, structural parts, etc., to improve cycle performance, increase initial charge and discharge capacity, and solve the effect of volume expansion

Active Publication Date: 2019-03-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the present invention uses nickel sulfide as the positive electrode material of the sodium ion battery, but the initial capacity of the nickel sulfide electrode material is low, and the problem of volume expansion will be encountered in the charging and discharging process, resulting in poor cycle effect ,

Method used

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  • A kind of preparation method and application of hollow spherical nickel sulfide positive electrode material
  • A kind of preparation method and application of hollow spherical nickel sulfide positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Prepare 1.5mM Na 2 The ethylene glycol solution of S;

[0024] (2) Prepare 1mM NiCl 2 ·6H 2 Ethylene glycol solution of O;

[0025] (3) Dissolve 0.3g of glucose in 2ml of distilled water to obtain a glucose solution

[0026] (4) the glucose solution that step (3) obtains and the NiCl that 45ml step (2) obtains 2 ·6H 2 The ethylene glycol solution of O was mixed evenly,

[0027] (5) 30ml of Na obtained in step (1) 2 The ethylene glycol solution of S was slowly added dropwise to the mixed solution obtained in step (4), stirred vigorously for 10 minutes to mix evenly, and reacted hydrothermally at 180°C for 8 hours,

[0028] (6) Centrifuge the reaction system in step (6), wash the filter cake three times with distilled water and twice with ethanol, then dry it at 60°C for 24 hours, and then sinter at 500°C for 2 hours to obtain a hollow spherical nickel sulfide positive electrode material , TEM pictures are attached figure 1 as shown,

[0029] Wherein, contro...

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Abstract

The invention relates to the field of a functional material, in particular to a preparation method and application of a hollow sphere nickel sulfide positive electrode material. In the hollow sphere nickel sulfide material obtained through the method, the specific surface area of the material is effectively expanded, and the initial charge-discharge capacity of the battery can be correspondingly improved; and meanwhile, by such a hollow sphere structure, the problem of material volume expansion during battery circulation can be effectively solved, and the cycle performance of the battery is improved.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a preparation method and application of a hollow spherical nickel sulfide cathode material. Background technique [0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, the storage and conversion of energy has become an important factor restricting the sustainable development of the world economy. Among various technologies, lithium-ion batteries have become the most promising high-energy battery system due to their advantages such as high working voltage, high capacity, small self-discharge and long cycle life. However, with the advent of the era of electric vehicles and smart grids , the current existing lithium resources will not be able to meet the huge demand for power lithium-ion batteries, so it is urgent to develop related technologies that are cheap and can replace lithium-ion batteries. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/36
CPCH01M4/5815H01M10/36Y02E60/10
Inventor 曲婕吕志刚丁建宁袁宁一
Owner CHANGZHOU UNIV
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