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

Negative electrode sheet of lithium ion battery, separator and method for manufacturing both

A lithium-ion battery and a manufacturing method technology, which are applied to battery electrodes, non-aqueous electrolyte battery electrodes, batteries, etc., can solve problems such as potential safety hazards for operators, high production cost, low evaporation efficiency, etc. The effect of increased capacity

Active Publication Date: 2017-01-04
ZHUHAI COSMX BATTERY CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can play the role of lithium supplementation and increase the capacity of the battery, however, because the lithium powder is relatively light, it is easy to float in the air, which will cause a greater safety hazard to the operator.
[0008] In addition, the Japanese patent application with application number JP2008038720 mentions that a metal lithium layer is evaporated on the surface of the negative electrode sheet by vacuum evaporation. Although the thickness of the evaporated metal lithium layer is thinner than that of the metal lithium sheet, in the process The thickness of the evaporated metal lithium layer is difficult to control, and the whole process must be carried out in a vacuum environment, the evaporation efficiency is also low, the subsequent electrode sheet processing is also more complicated, and the production cost is higher

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
  • Negative electrode sheet of lithium ion battery, separator and method for manufacturing both
  • Negative electrode sheet of lithium ion battery, separator and method for manufacturing both
  • Negative electrode sheet of lithium ion battery, separator and method for manufacturing both

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 As shown, a negative electrode sheet of a lithium-ion battery includes a negative electrode collector sheet 11, both surfaces of the negative electrode collector sheet are coated with active material layers 12, and metal lithium 2 is attached to the surface of one active material layer.

[0040] In this embodiment, the shape of the metal lithium 2 is filamentous. like image 3 As shown, metallic lithium is arranged into multiple vertical line segments.

[0041] The manufacturing method of the above-mentioned negative electrode sheet is specifically: coating a binder on the surface of one of the active material layers on the negative electrode current collector, then distributing metal lithium on the binder, and using a non-adhesive treatment on the outer peripheral surface. The roller exerts pressure on the lithium metal to better connect the lithium metal to the active material layer.

[0042] Non-adhesive treatment is performed on the outer peripheral...

Embodiment 2

[0046] like figure 2 As shown, a diaphragm for a lithium ion battery includes a diaphragm base 21, and is characterized in that metal lithium 2 is attached to the side of the diaphragm base 21 opposite to the negative electrode sheet.

[0047] In this embodiment, the shape of the metal lithium 2 is filamentous. like image 3 As shown, metallic lithium is arranged into multiple vertical line segments.

[0048] The manufacturing method of the above-mentioned negative electrode sheet is specifically: coating a binder on the side of the diaphragm substrate opposite to the negative electrode sheet, then distributing metal lithium on the binder, and using a roller with a non-adhesive treatment on the outer peripheral surface to apply the metal lithium. pressure to better connect lithium metal to the separator substrate.

[0049] Non-adhesive treatment is performed on the outer peripheral surface of the roller, specifically, wrapping the outer peripheral surface of the roller with ...

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

No PUM Login to View More

Abstract

The present invention specifically relates to a negative electrode sheet of a lithium ion battery, a diaphragm and a method for manufacturing the two, wherein the negative electrode sheet of a lithium ion battery includes a negative electrode substrate, and at least one surface of the negative electrode substrate is coated with an active material layer, It is characterized in that metal lithium is attached to the surface of at least one active material layer. When a lithium-ion battery uses the negative electrode sheet of the present invention, metal lithium will undergo a dissolution reaction due to the principle of a local battery, and at the same time, an SEI film will be generated on the surface of the active material layer of the negative electrode sheet, and a small part of lithium ions will be embedded in the active material. In order to improve the capacity of lithium-ion batteries, to overcome the large irreversible capacity of Sn, Si and other materials, the matching of the manufactured negative electrode and positive electrode capacity does not match, and the performance of the positive electrode cannot be fully exerted. Capacity has been greatly improved. Therefore, the negative electrode sheet of the present invention can increase the capacity of the lithium ion battery.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of manufacturing methods of lithium-ion batteries, and in particular relates to a negative electrode sheet, a diaphragm and a manufacturing method of the lithium-ion batteries. [0003] 【Background technique】 [0004] Lithium-ion battery is a portable and environmentally friendly battery with high voltage, high energy density, long cycle life, and good safety performance. It has been widely used in portable electronic devices such as mobile phones, video recorders, and tablet computers. got some application. However, with the miniaturization of portable electronic devices, and the development and application of high-power devices such as electric vehicles (EV) and hybrid electric vehicles (HEV) have been highly valued, people require high-capacity lithium-ion batteries as power systems. and high power characteristics. [0005] In order to meet the requirements of high capacity and high power, resea...

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): H01M4/13H01M4/139H01M2/16H01M50/403H01M50/417
CPCH01M4/13H01M4/139H01M10/0525H01M2220/20H01M50/409Y02E60/10
Inventor 高云智徐延铭陈秀梅李俊义
Owner ZHUHAI COSMX BATTERY CO LTD