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

High-energy density type lithium ion battery and preparation method

A lithium-ion battery, high energy density technology, applied in electrolyte battery manufacturing, electrode manufacturing, secondary batteries, etc., can solve the problems of capacity, endurance, energy density and safety that cannot meet the needs of social and technological development, etc. Achieve the effect of improving dispersion unevenness, increasing rate performance, and increasing energy density

Inactive Publication Date: 2021-03-16
王书珍
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although lithium-ion batteries have been widely used, they still cannot meet the needs of society and technological development in terms of capacity, battery life, energy density and safety.

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
  • High-energy density type lithium ion battery and preparation method
  • High-energy density type lithium ion battery and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-energy-density lithium-ion battery comprises a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte, the positive electrode sheet includes an aluminum foil and a positive electrode material layer, the negative electrode sheet includes a copper foil and a negative electrode material layer, and the positive electrode material layer Including a positive electrode active material, a positive electrode conductive agent and a positive electrode binder, the negative electrode material layer includes a negative electrode active material, a negative electrode conductive agent, a negative electrode binder and a negative electrode dispersant;

[0034] The mass proportion of the positive electrode active material is: 97%, the mass proportion of the positive electrode conductive agent is: 0.1%, and the mass proportion of the positive electrode binder is: 2.9%;

[0035] The mass proportion of the negative electrode active material is: 95%, the ma...

Embodiment 2

[0044] A high-energy-density lithium-ion battery comprises a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte, the positive electrode sheet includes an aluminum foil and a positive electrode material layer, the negative electrode sheet includes a copper foil and a negative electrode material layer, and the positive electrode material layer Including a positive electrode active material, a positive electrode conductive agent and a positive electrode binder, the negative electrode material layer includes a negative electrode active material, a negative electrode conductive agent, a negative electrode binder and a negative electrode dispersant;

[0045] The mass proportion of the positive electrode active material is: 99%, the mass proportion of the positive electrode conductive agent is: 0.01%, and the mass proportion of the positive electrode binder is: 0.99%;

[0046] The mass proportion of the negative electrode active material is: 99%, the ...

Embodiment 3

[0055] A high energy density lithium-ion battery, comprising a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode material layer, the negative electrode sheet includes a negative electrode current collector and a negative electrode material layer, the The positive electrode material layer includes a positive electrode active material, a positive electrode conductive agent and a positive electrode binder, and the negative electrode material layer includes a negative electrode active material, a negative electrode conductive agent, a negative electrode binder and a negative electrode dispersant;

[0056] The mass proportion of the positive electrode active material is: 98.45%, the mass proportion of the positive electrode conductive agent is: 0.05%, and the mass proportion of the positive electrode binder is: 1.5%;

[0057] The mass proportion o...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a high-energy density type lithium ion battery and a preparation method. According to the high-energy density type lithium ion battery, a positive electrode material layer comprises a positive electrode active substance, a positive electrode conductive agent and a positive electrode binder, and a negative electrode material layer comprises a negative electrode active substance, a negative electrode conductive agent, a negative electrode binder and a negative electrode dispersing agent; the mass ratio of thepositive electrode active substance is 97-99%, the mass ratio of the positive electrode conductive agent is 0.01-1%, and the mass ratio of the positive electrode binder is 0.99-2.9%; the mass ratio of the negative electrode active substance is 95-99%, the mass ratio of the negative electrode conductive agent is 0.1-0.8%, the mass ratio of the negative electrode binder is 0.4-4%, and the mass ratio of the negative electrode dispersing agent is 0.5-2%. The lithium ion battery has the characteristics of high energy and high density, and the rate capability of the battery can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a high energy density lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have become ideal power sources for portable devices such as mobile phones and laptops due to their advantages such as low self-discharge power, no memory effect, safety and environmental protection. However, in order to meet the power supply requirements of large-scale equipment such as electric vehicles and hybrid vehicles, the energy density and power density of lithium-ion batteries need to be further improved. Lithium-ion battery is composed of positive electrode, negative electrode, diaphragm and electrolyte. When external power is connected, the battery is in the process of charging. Under the force of the external voltage, the Li+ of the positive electrode is removed from the positive electrode, passes through the small hole in the...

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 Applications(China)
IPC IPC(8): H01M10/0525H01M10/058C01B32/159H01M4/04H01M4/62
CPCC01B32/159H01M4/0404H01M4/625H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 王书珍
Owner 王书珍