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

Device for preparing composite lithium metal negative pole and preparation method

A metal negative electrode, composite lithium technology, applied in electrode manufacturing, battery electrodes, electrochemical generators, etc., can solve the problems of easy generation of lithium dendrites, no mass production, phase transition, etc., to achieve mass production, high Application value, high efficiency effect

Active Publication Date: 2018-07-27
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium metal negative electrode produced by the above method has problems such as easy generation of lithium dendrites and continuous phase change during the cycle, and the preparation of a composite lithium metal negative electrode by combining with graphene oxide will effectively improve the above problems, but the current composite The lithium metal negative electrode cannot be prepared by the above method, and there is no effective method for mass production

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
  • Device for preparing composite lithium metal negative pole and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The present invention also provides a method for preparing a composite lithium metal negative electrode device, the method comprising the following steps:

[0025] (1) Coating graphene oxide on the current collector and drying it into rolls;

[0026] (2) Vacuumize the current collector after drying into a roll, and unwind the current collector into the first pool through the first back roller, so that the current collector and the liquid lithium metal in the first pool undergo the first Contact to complete the reduction pretreatment;

[0027] (3) Continue to unwind the current collector into the second cell body through the second back roller, so that the current collector contacts the liquid lithium metal in the second cell body for the second time;

[0028] (4) The current collector after the second contact is rolled by a pressure roller to make a sheet-shaped composite lithium metal negative electrode.

[0029] Further, in the step (1), the coating method of graphe...

Embodiment

[0038] The current collector is made of copper foil, and the graphene oxide slurry is transported to the extrusion die through a screw pump, and coated on the surface of the copper foil. The coating thickness on one side is 30 μm, and it is baked at a temperature of 120 ° C; After completion, put the copper foil roll coated with graphene oxide into the vacuum equipment for vacuum treatment, and vacuum to 10 -5 pa; heat the first pool body and the second pool body to 190°C to complete the melting of lithium metal; unwind and adjust the position of the first backing roller so that the bottom surface of the first backing roller is in line with the liquid level of the first pool body At this time, there will be a rapid reduction reaction, and the trace gas generated by the reaction will be discharged from the air outlet. The reaction will also release heat, and there will be a slight volume expansion. In order to prevent heat accumulation, it needs to be cooled after contacting the...

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 invention relates to a device for preparing a composite lithium metal negative pole and a preparation method. The device comprises a first back roll, a first transition roll, a second back roll, asecond transition roll and a press roll which are arranged sequentially, wherein a first tank body and a second tank body are arranged below the first back roll and the second back roll, liquid lithium metals are accommodated in the first tank body and the second tank body, and a current collector coated with graphene oxide passes by the first back roll, the first transition roll, the second backroll, the second transition roll and the press roll and makes contact with liquid lithium metals in the first tank body and the second tank body. According to the technical scheme, the current collector is conveyed through the first back roll, the first transition roll, the second back roll and the second transition roll, the liquid lithium metals in the first tank body and the second tank body react with the current collector coated with graphene oxide, the current collector is rolled through the press roll to form the composite lithium metal negative pole, the whole device can realize large-scale production of the composite lithium metal negative pole and is safe, reliable and high in efficiency.

Description

technical field [0001] The invention relates to a device and a preparation method for preparing a composite lithium metal negative electrode. Background technique [0002] In recent years, lithium-ion batteries have been widely used in new energy vehicles, and the requirements for lithium-ion batteries are also increasing, especially the requirements for battery energy density. The current cruising range of pure electric new energy vehicles is concentrated in 200-400 kilometers, which is still far from the expectations of the public. It is imperative to further increase the energy density of batteries. [0003] Due to the highest theoretical capacity (3860mAh / g) and the lowest electrochemical potential, lithium metal anode is considered to be one of the most promising anode materials for lithium-ion batteries in the future, and it is expected to be applied to batteries with high energy density in the near future. The traditional methods of preparing pure lithium metal ano...

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
IPC IPC(8): H01M4/04H01M10/0525
CPCH01M4/043H01M10/0525Y02E60/10
Inventor 许涛
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY