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

Method for manufacturing anode for lithium secondary battery

A lithium secondary battery, negative electrode technology, applied in secondary batteries, lithium storage batteries, battery electrodes, etc., can solve problems such as stripping lithium metal, and achieve the effect of reducing lithium loss, excellent electrical performance and capacity

Pending Publication Date: 2021-12-21
LG ENERGY SOLUTION LTD
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem with the above-mentioned pre-lithiation method is that it is difficult to strip lithium metal from the support when lithium is diffused into the negative electrode active material layer by transfer after forming lithium metal on the support.

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
  • Method for manufacturing anode for lithium secondary battery
  • Method for manufacturing anode for lithium secondary battery
  • Method for manufacturing anode for lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0059] 1M LiPF 6 Added to the mixed solvent generated by mixing EC (ethylene carbonate, ethylene carbonate) and EMC (ethylmethyl carbonate, ethyl methyl carbonate) in a ratio of 3:7 to prepare an electrolyte solution; and 0.1% by weight of A copolymer of methyl acrylate and n-butyl acrylate was added to this electrolyte solution to be completely dissolved.

[0060] A coin-type three-electrode cell was fabricated using 20 μm thick lithium metal (Honzo Co., Ltd.) as a counter electrode and a reference electrode, and a stainless steel plate as a working electrode. At this time, porous polyethylene was used as a separator, and after assembling the coin-type three-electrode battery, an electrolytic solution was injected.

preparation example 2

[0062] A three-electrode battery was fabricated in the same manner as in Preparation Example 1 except that 0.5% by weight of a copolymer having methyl acrylate and n-butyl acrylate was added to the electrolytic solution.

preparation example 3

[0064] A three-electrode battery was fabricated in the same manner as in Preparation Example 1 except that 1.0% by weight of a copolymer having methyl acrylate and n-butyl acrylate was added to the electrolytic solution.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

A method for manufacturing an anode for a lithium secondary battery according to the present invention comprises: a step of forming a lithium layer on a protection layer of a transfer film including a substrate and the protection layer to prepare a lithium transfer film; and a transfer step of preparing an anode having an anode active material layer formed on a current collector, and bonding and rolling the lithium transfer film such that the lithium layer faces the anode active material layer, wherein the protection layer contains an acrylic resin, and the lithium layer and the protection layer are transferred onto the anode active material layer in the transfer step.

Description

technical field [0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0110716 filed on September 6, 2019, the entire contents of which are hereby incorporated by reference. [0002] The invention relates to a negative electrode for a lithium secondary battery and a manufacturing method thereof. Background technique [0003] In recent years, with the development and popularization of mobile devices, personal computers, electric motors, and temporary power storage devices, high-capacity energy sources are required, of which lithium secondary batteries are a representative example. Silicon (Si), which has a capacity (4200mAh / g) 10 times or more that of conventional graphite-based materials (theoretical capacity 372mAh / g), is attracting attention as a negative electrode material for next-generation non-aqueous electrolyte secondary batteries. [0004] Thus, the use of metal oxides with high theoretical capacity such as silicon oxi...

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): H01M4/04H01M4/36H01M4/62H01M10/0525H01M4/139
CPCH01M4/0421H01M4/044H01M4/366H01M4/62H01M10/0525H01M4/139H01M2004/027H01M4/1395Y02E60/10H01M4/0435H01M4/382H01M4/628H01M4/0404H01M4/1391H01M4/0459H01M4/134H01M10/052H01M4/386H01M4/0423
Inventor 尹锡逸
Owner LG ENERGY SOLUTION LTD