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Negative electrode material used for sodium ion battery and preparation method and application of negative electrode material

A sodium-ion battery and negative electrode material technology, which is applied in the field of materials science, can solve the problems of battery capacity attenuation, restricting development, etc., and achieve the effects of low preparation cost, low performance requirements, and good safety performance

Active Publication Date: 2017-08-22
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of material has great development potential, but the change of electrode material structure caused by the volume expansion of the electrode during the charge and discharge process can cause the attenuation of battery capacity, thus restricting its development

Method used

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  • Negative electrode material used for sodium ion battery and preparation method and application of negative electrode material
  • Negative electrode material used for sodium ion battery and preparation method and application of negative electrode material
  • Negative electrode material used for sodium ion battery and preparation method and application of negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 2.25g of nickel oxide and 1.488g of boric acid evenly through dry ball milling, heat up to 650°C at a rate of 3°C / min in a tube furnace under air atmosphere and keep it at a constant temperature for 5h, then cool naturally to room temperature, and use After washing with hot water at 100°C, dry at 100°C for 10 hours to obtain the product nickel borate.

Embodiment 2

[0027] Mix 8.73g of nickel nitrate hexahydrate and 1.488g of boric acid uniformly by ball milling, heat up to 850°C at a rate of 3°C / min in a tube furnace under air atmosphere and keep it at a constant temperature for 4h, then cool naturally to room temperature, and use After washing with hot water at 70°C, dry at 120°C for 12 hours to obtain the product nickel borate.

[0028] figure 1 It is the XRD pattern of nickel borate material, the peak position of the XRD pattern of the material can completely match the peak position and peak intensity on the standard card (JCPDS.No. 75-1809), indicating that the composition of the prepared material is Ni 3 B 2 o 6 , and no impurity exists. figure 2 It is the first and second charge and discharge curves of nickel borate material, as shown in the figure, within the charge and discharge voltage range of 0.01-3.0V, there is an obvious discharge platform in the first discharge process, while in the The same platform did not appear in ...

Embodiment 3

[0030] Mix 4.41g of nickel oxalate and 1.488g of boric acid uniformly by ball milling, heat up to 750°C at a rate of 5°C / min under air atmosphere and keep the temperature for 10h, then naturally cool to room temperature, wash with 80°C hot water, and Dry at 100°C for 8 hours to obtain the product nickel borate.

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Abstract

The invention provides a negative electrode material used for a sodium ion battery. The negative electrode material has a chemical formula of Ni3B2O6, an orthorhombic crystal system crystal structure and belongs to a Pnnm space group. The invention also provides a preparation method for the negative electrode material used for the sodium ion battery; a nickel source and a boron source are mixed uniformly to be calcined in an oxidization atmosphere condition; and then steps of cooling, washing and drying are performed to prepare a pure-phase nickel borate material. The negative electrode material has the characteristics of wide raw material resource, low preparation cost, simple preparation technological process, low equipment performance requirement, high product purity, high safety and the like; and when the prepared nickel borate material is applied to the sodium ion battery, high sodium storage capability and excellent electrochemical performance are shown.

Description

technical field [0001] The invention belongs to the field of materials science and relates to an energy storage material, in particular to a negative electrode material for a sodium ion battery and its preparation and application. Background technique [0002] The rapid development of green energy sources such as solar energy, wind energy, and tidal energy has put forward higher requirements and wider application ranges for their supporting energy storage systems. As the most promising energy storage system, the research and development of chemical power sources have attracted the attention of many scholars. Since the commercialization of lithium-ion batteries in the 1990s, they have developed rapidly due to their advantages such as high voltage, high energy density, and no memory effect. They have been widely used in portable electronic devices, electric vehicles, etc.; Due to the limitation of lithium-ion batteries, chemical battery systems that can replace lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M10/054
CPCH01M4/48H01M10/054Y02E60/10
Inventor 王保峰田剑莉亚许贝贝马潇平秋实
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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