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

Electrode for lithium secondary battery comprising hygroscopic materials and lithium secondary battery comprising the same

A lithium secondary battery, hygroscopic technology, applied in the field of lithium secondary battery electrodes and lithium secondary batteries containing it, can solve the problems of electrode moisture removal, etc., achieve the effect of eliminating side reactions and improving battery performance

Active Publication Date: 2017-06-13
LG ENERGY SOLUTION LTD
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the moisture in the electrodes cannot be removed to the desired extent by the above methods alone, and it is necessary to develop a new technology that can improve battery performance by more effectively removing moisture from the electrodes

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
  • Electrode for lithium secondary battery comprising hygroscopic materials and lithium secondary battery comprising the same
  • Electrode for lithium secondary battery comprising hygroscopic materials and lithium secondary battery comprising the same
  • Electrode for lithium secondary battery comprising hygroscopic materials and lithium secondary battery comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1: Production of Negative Electrode for Lithium Secondary Battery Containing Hygroscopic Substance

[0081] As the negative electrode active material, the average particle size is 25 μm of 86% by weight of graphite, 1% by weight of acetylene black (Denka black) (conductive agent), 2% by weight of SBR (bonding agent) and 1% by weight of CMC (enhancement agent). Thickener) was mixed with NMP as a solvent to prepare negative electrode slurry. The negative electrode active material slurry prepared above was coated on one side of a copper (Cu) thin film as a 10 μm negative electrode current collector with a thickness of 65 μm to form an active material layer, and it was dried, and then the hygroscopic material The average particle size (D 50 ) of 0.5 μm silica gel was mixed with NMP in an amount of 1 / 10 parts by weight of the graphite to prepare a mixed solution, and the mixed solution was slowly permeated into the active material layer for 30 minutes. After infi...

Embodiment 2 to Embodiment 5

[0083] A negative electrode was produced in the same manner as in Example 1 above, except that the particle size of the silica gel was changed to the particle size shown in Table 1 below.

Embodiment 6 to Embodiment 10

[0085] In addition to using hygroscopic substances of different sizes and / or types as shown in Table 1 below instead of the above-mentioned average particle diameter (D 50 ) was 0.5 μm of silica gel, a negative electrode was produced in the same manner as in Example 1 above.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electrode for lithium secondary battery comprising hygroscopic materials and a lithium secondary battery comprising the same, relates to an electrode for a lithium secondary battery in which an absorbent material is disposed between voids formed by the active material in the active material layer. In the electrode for a lithium secondary battery of the present invention, the hygroscopic material is located between the voids formed by the active material in the active material layer, so that the moisture present in the electrode and the electrolytic solution can be removed, so that it is possible to eliminate the presence of Moisture caused by the side effects, which can improve the battery performance.

Description

technical field [0001] The present invention relates to an electrode for a lithium secondary battery containing a hygroscopic substance and a lithium secondary battery including the same, and more specifically, to a lithium secondary battery capable of improving battery performance by including a hygroscopic material for removing fine moisture from the electrode An electrode and a lithium secondary battery including the same. Background technique [0002] With the technological development and increase in demand for mobile devices, the demand for secondary batteries as energy sources is also rapidly increasing. Among such secondary batteries, lithium secondary batteries exhibiting high energy density and operating potential, long cycle life, and low self-discharge rate are commercialized and widely used. [0003] In addition, in recent years, as attention to environmental issues has increased, vehicles that can replace gasoline vehicles and diesel vehicles that use fossil f...

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): H01M10/0525H01M4/13H01M4/139H01M4/62
CPCH01M4/13H01M4/139H01M4/62H01M10/0525Y02E60/10H01M10/052H01M10/4235
Inventor 蔡午秉姜允雅金银卿申善英
Owner LG ENERGY SOLUTION LTD