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

Electrode components with laser induced surface modified current collectors and methods of making same

A technology of electrode components and current collectors, which is applied in the field of electrode components with laser-induced surface modification of current collectors and its manufacture, and can solve the problems of increased resistance and impedance

Pending Publication Date: 2021-05-28
GM GLOBAL TECH OPERATIONS LLC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, this weak long-term adhesion may lead to an undesired increase in resistance and impedance during battery cycling

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 components with laser induced surface modified current collectors and methods of making same
  • Electrode components with laser induced surface modified current collectors and methods of making same
  • Electrode components with laser induced surface modified current collectors and methods of making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1 - Comparison of laser treated surface of copper (Cu) current collector with untreated surface of Cu current collector

[0079] In oxygen (e.g. from compressed O 2 In the presence of a nanosecond laser, a part of the surface of the Cu current collector was laser-treated to form a CuO layer on the surface. The laser beam has a power of 270 W, a wavelength of 1064 nm, a scanning speed of 500 mm / s, a pulse width of 200 ns, a repetition rate of 20 kHz, an overlap of 30%, and a circular spot size of about 67 μm. The laser processing temperature is about 3500°C. The remainder of the Cu current collector was not laser treated. A scanning electron microscope (SEM) image of the Cu current collector was taken, and as shown in FIG. 5A , the untreated portion 500 of the Cu current collector had a smooth surface, and the laser treated portion 510 of the Cu current collector included features. exist Figure 5B The multiple features are more clearly depicted in, Figure ...

Embodiment 2

[0080] Example 2 - Peel Test

[0081] Peel tests were performed on conventional lithium-based electrode assemblies and lithium-based electrode assemblies prepared according to the present disclosure. In particular, the conventional lithium-based electrode assembly was prepared by applying a lithium layer on a Cu current collector, where the Cu current collector was untreated. A lithium-based electrode assembly prepared according to the present disclosure was prepared by laser-treating the Cu current collector surface as described in Example 1 above to form a CuO layer and applying a lithium foil layer onto the laser-treated surface of the Cu current collector. Such as Figure 7A As shown in , lithium-based electrode assemblies prepared according to the present disclosure exhibit excellent adhesion, while as Figure 7B As shown in , conventional Li-based electrode assemblies undergo adhesive failure.

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

The application relates to electrode components with laser induced surface modified current collectors and methods of making the same. An electrode component for an electrochemical cell is provided herein. The electrode component includes a current collector having a first surface, a metal oxide layer disposed on the first surface of the current collector, and a lithium-containing layer bonded to the first surface of the current collector. The metal oxide layer includes a plurality of features. A method for manufacturing such an electrode component is also provided herein. The method includes directing a laser beam toward the first surface of the current collector in the presence of oxygen to form the metal oxide layer on the first surface and applying the lithium-containing layer to the metal oxide layer thereby bonding the lithium-containing layer with the current collector.

Description

technical field [0001] The present application relates to electrode assemblies with laser-induced surface modification of current collectors, methods of making the same, and electrochemical cells comprising the same. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] High energy density electrochemical cells, such as lithium-ion batteries, are used in various consumer products and vehicles such as hybrid electric vehicles (HEV) and electric vehicles (EV). A typical lithium-ion battery includes a first electrode (eg, a cathode), a second electrode of opposite polarity (eg, an anode), an electrolyte material, and a separator. Conventional lithium-ion batteries operate by reversibly transferring lithium ions between negative and positive electrodes. A separator and an electrolyte are disposed between the negative electrode and the positive electrode. The electrolyte is suit...

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): H01M4/13H01M4/36H01M4/62H01M4/66H01M10/0525
CPCH01M4/661H01M4/667H01M4/621H01M4/366H01M10/0525H01M4/13H01M4/382H01M2004/027H01M10/052H01M4/78H01M4/134H01M4/1395Y02E60/10H01G11/28H01G11/68H01G11/30H01G11/86Y02T10/70H01M4/62H01M4/0404H01M4/0492H01M4/0471
Inventor 戴放王宏亮陈书如Q·张蔡梅
Owner GM GLOBAL TECH OPERATIONS LLC