Unlock instant, AI-driven research and patent intelligence for your innovation.

Anode material, preparation method thereof, and lithium ion battery

A negative electrode material, cubic technology, applied in the field of energy materials, can solve the problems of expensive three-dimensional porous copper framework, low theoretical specific capacity of cuprous oxide, unfavorable production cost, etc., to achieve enhanced electrode kinetics, reduced diffusion pathways, and easy synthesis Effect

Active Publication Date: 2022-07-08
中科南京绿色制造产业创新研究院 +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method and the lithium-ion battery negative electrode prepared by it have the following disadvantages: (1) the three-dimensional porous copper framework used in the experiment is expensive as a precursor, which is not conducive to the reduction of production cost
However, the theoretical specific capacity of the synthesized cuprous oxide is low (374mAh g -1 ), much lower than the theoretical specific capacity of copper oxide (674mAh g -1 )

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anode material, preparation method thereof, and lithium ion battery
  • Anode material, preparation method thereof, and lithium ion battery
  • Anode material, preparation method thereof, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1 provides a negative electrode material for a lithium ion battery. The negative electrode material for the lithium ion battery has a hollow single-shell structure, the shell structure is composed of copper oxide, and the particle size of the negative electrode material for the lithium ion battery is 100 -150nm, the thickness of the shell layer is 8-10nm.

[0071] The preparation method of the lithium ion battery negative electrode material comprises the following steps:

[0072] (1) Dissolve copper acetylacetonate in 1,5-pentanediol (PD), put it into a magnetic rotor, and continue stirring for about 4 hours in a water bath at 50°C until the copper acetylacetonate dissolves and no solid particles are present, resulting in a blue color solution, then pour the weighed polyvinylpyrrolidone (PVP, Mw=360,000) into the solution, and continue to stir in the water bath until there are no solid particles to obtain a blue liquid, in which copper acetylacetonate and 1,5...

Embodiment 2

[0082] This embodiment 2 provides a negative electrode material for a lithium ion battery, the negative electrode material for the lithium ion battery is a hollow single-shell structure, the composition of the shell structure is copper oxide, and the particle size of the negative electrode material for the lithium ion battery is 90 -120nm, the thickness of the shell layer is 8-10nm.

[0083] The difference between the preparation method of the negative electrode material of the lithium ion battery and the embodiment 1 is that the temperature in step (1) is stabilized at 160° C. for 6 hours to obtain a suspension, and the other steps are the same as those of the embodiment 1.

[0084] image 3 The TEM photo of the precursor cuprous oxide prepared in Example 2, it can be seen from the figure that the particles show a solid cubic structure, but the surface of some cubic structures is uneven, indicating that reducing the reaction time will lead to insufficient curing time and low ...

Embodiment 3

[0086] This embodiment 3 provides a negative electrode material for a lithium ion battery. The negative electrode material for the lithium ion battery has a hollow single-shell structure, the shell structure is composed of copper oxide, and the particle size of the negative electrode material for the lithium ion battery is 90 -120nm, the thickness of the shell layer is 8-10nm.

[0087] The difference between the preparation method of the negative electrode material of the lithium ion battery and the embodiment 1 is that the temperature in step (1) is stabilized at 160° C. for 48 hours to obtain a suspension, and other steps are the same as those of the embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a negative electrode material, a preparation method thereof and a lithium ion battery. The negative electrode material comprises a nano-scale cubic hollow structure, the cubic hollow structure comprises a cubic shell layer and a hollow cavity, and the main composition of the shell layer is copper oxide. The method includes: 1) preparing a mixed solution comprising copper salt, an organic solvent and an organic ligand, and performing a hydrothermal reaction, wherein the time of the hydrothermal reaction is greater than 3 hours, to obtain a precursor; 2) oxidizing treatment to obtain the negative electrode Material. In the negative electrode material of the present invention, the nano-scale cubic hollow structure is conducive to accommodating the volume expansion caused by ion de-intercalation, and is mainly composed of a copper oxide shell structure, which can provide abundant electroactive regions and promote the contact between the active material and the electrolyte. , reducing the diffusion pathways of ions and electrons, greatly enhancing the electrode kinetics and improving the cycling stability. The method of the invention is simple, has strong operability, is easy to synthesize, and the used raw materials are environmentally friendly and do not contain toxic substances.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and particularly relates to a negative electrode material, a preparation method thereof and a lithium ion battery. Background technique [0002] Lithium-ion batteries have been successfully used in portable electronic products as energy conversion devices since 1990 due to their high energy, high power density, and long cycle life. As the electrode absorbs more ions, the electrode expands, and the accumulated stress collapses the electrode skeleton. Subsequently, the intercalated ions decreased, and the capacity and cycling stability decreased. To solve this problem, various morphologies of electrodes have been explored, among which the hollow single-shell cubic structure is an excellent anode material structure because: (1) the hollow structure can accommodate volume expansion and can buffer desorption / intercalation The mechanical stress accompanying the volume change during the proce...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/366H01M4/48H01M10/0525B82Y30/00B82Y40/00Y02E60/10
Inventor 王宝赵婕
Owner 中科南京绿色制造产业创新研究院