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Nano-diamond-containing lithium ion battery pole piece and preparation method thereof

A nano-diamond and lithium-ion battery technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of accelerated battery capacity decay, SEI film damage, low heat production, etc., to reduce internal resistance, heat production, and volume Small expansion and improved electrical conductivity

Inactive Publication Date: 2019-06-14
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of new energy vehicle technology, higher requirements are placed on battery life, which requires batteries to have lower internal resistance, lower heat production, and a more stable material system during charging and discharging. An important reason for the reduction is that the volume of each component material of the positive and negative electrodes continuously expands and shrinks during the charging and discharging process, which leads to the destruction and repair of the SEI film. The SEI repair process needs to consume lithium ions, which accelerates the battery capacity decay

Method used

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  • Nano-diamond-containing lithium ion battery pole piece and preparation method thereof
  • Nano-diamond-containing lithium ion battery pole piece and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A kind of preparation method that the present invention proposes containing the lithium ion battery pole piece of nano-diamond, comprises the following steps:

[0024] S1. According to the conditions that the total solid content of the conductive paste is 6% and the weight ratio of additives, ion-implanted nano-diamonds, and conductive carbon nanotubes is 15:30:55, weigh the additives and ion-implanted nano-diamonds respectively. The quality of diamond, carbon nanotubes and solvent NMP, and then the weighed additives are mixed with NMP to obtain a mixed solution, and then ion-implanted nano-diamonds are added to the mixed solution, and the ultrasonic frequency of 80KHz is dispersed for 15 minutes to form Suspension, finally add conductive agent carbon nanotubes and mix evenly, and then treat with 40KHz ultrasonic frequency for 15min to make conductive paste;

[0025] S2. Dissolve HSV 900 in NMP to form a binder glue with a solid content of 8%. The ratio of the solid mas...

Embodiment 2

[0028] A kind of preparation method that the present invention proposes containing the lithium ion battery pole piece of nano-diamond, comprises the following steps:

[0029] S1. First, according to the conditions that the total solid content of the conductive paste is 8% and the weight ratio of additives: nano-diamond: conductive agent carbon nanotubes is 10:40:50, weigh the additives and ion-implanted nano-diamond powder respectively , carbon nanotubes and solvent NMP, and then mix the weighed additive with NMP to obtain a mixed solution, and then add ion-implanted nano-diamond powder to the mixed solution and disperse it with an ultrasonic frequency of 80KHz for 15 minutes to form a suspension. Turbid liquid, finally add conductive agent carbon nanotubes and mix evenly, then treat with 40KHz ultrasonic frequency for 20min to make conductive paste;

[0030] S2. Dissolve HSV 900 in NMP to obtain the binder glue according to the ratio of the solid content of the binder glue to...

Embodiment 3

[0033] A kind of preparation method that the present invention proposes containing the lithium ion battery pole piece of nano-diamond, comprises the following steps:

[0034] S1. Firstly, according to the design that the total solid content of the conductive paste is 8%, and the weight ratio of additives, ion-implanted nano-diamond powder, and conductive agent carbon nanotubes is 20:20:60, weigh the additives and ion implantation respectively. The quality of the nano-diamond powder, carbon nanotubes and solvent NMP, and then the weighed additives are mixed with NMP evenly, and then the ion-implanted nano-diamond powder is added and dispersed for 15 minutes at an ultrasonic frequency of 80KHz to form a suspension. Finally, add conductive agent carbon nanotubes and mix evenly, and then treat with 40KHz ultrasonic frequency for 20min to make conductive paste;

[0035] S2. Dissolving HSV 900 in NMP to form a binder glue, wherein the solid content of the binder glue is 7%, and then...

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Abstract

The invention discloses a nano-diamond-containing lithium ion battery pole piece and a preparation method thereof; the preparation method comprises the following steps of preparing conductive slurry from the nano-diamond and a conductive agent; adding the conductive slurry into an adhesive glue solution to be uniformly dispersed to form conductive glue solution; enabling active substances to be added into the conductive glue solution to be dispersed and homogenized to obtain slurry, wherein the slurry is coated on the surface of a current collector to obtain the lithium ion battery pole piececontaining the nano-diamond. The preparation method of the nano-diamond-containing lithium ion battery pole piece is simple in process, and the obtained pole piece is high in conductivity, low in internal resistance, low in heat generation amount, stable in structure and capable of improving the overall performance of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium ion battery pole piece containing nano-diamond and a preparation method thereof. Background technique [0002] As people pay more and more attention to environmental protection and the further reduction of non-renewable energy reserves such as petroleum, the development of renewable energy industries such as new energy has become a national strategy in my country. In recent years, lithium-ion batteries have rapidly become the first choice for new energy vehicle power battery energy storage systems due to their excellent electrochemical properties such as high energy density, long cycle life, and no memory effect. Broad prospects. [0003] With the development of new energy vehicle technology, higher requirements are placed on battery life, which requires batteries to have lower internal resistance, lower heat production, and a more stable material system duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/133H01M4/04H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 王金龙樊少娟张迎霞段锐钟明明
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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