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US 12,542,270 B2Granted
Lithium metal patterning and electrochemical device using the same
AssigneeLG Energy Solution, Ltd.
InventorsOh-Byong Chae, Eun-Kyung Kim, Sang-Wook Woo, Geun-Sik Jo, Soo-Hee Kang, Hee-Won Choi
Life of this patent
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Abstract
A lithium metal is physically pressed to a silicon wafer having a uniform intaglio or embossed pattern formed thereon in advance, or liquid lithium is applied to the silicon wafer and may then be cooled in order to form a uniform pattern on the surface of the lithium metal.
Claims14
An electrode for a secondary battery comprising a patterned lithium metal comprising:
- a uniform pattern comprising a plurality of recessed portions on a surface of a lithium metal, the plurality of recessed portions being arranged uniformly in a first direction on the surface of the lithium metal and uniformly in a second direction orthogonal to the first direction on the surface of the lithium metal,
- wherein the uniform pattern is an intaglio or embossed pattern into the surface of the lithium metal and the plurality of recessed portions have a size of 0.001 μm to 900 μm on the lithium metal and the size is a length or a width, and a depth of the plurality of recessed portions is in a range of more than 0 μm to 20 μm or less, and
- wherein the electrode is a current collector free electrode.
An electrode for a secondary battery comprising a uniform patterned lithium metal comprising:
- a uniform pattern comprising a plurality of recessed portions on a surface of a lithium metal, the plurality of recessed portions being arranged uniformly in a first direction on the surface of the lithium metal and uniformly in a second direction orthogonal to the first direction on the surface of the lithium metal,
- wherein a distance between patterns in the uniform pattern is from 20 μm to 100 μm,
- wherein the uniform pattern is an intaglio or embossed pattern into the surface of the lithium metal and the plurality of recessed portions have a size of 100 μm to 400 μm on the lithium metal and the size is a length or a width, and a depth of the plurality of recessed portions is in a range of more than 0 μm to 20 μm or less,
- wherein a horizontal shape of the uniform intaglio or embossed pattern is polygonal, circular, or oval, and a vertical sectional shape of the uniform intaglio or embossed pattern is polygonal, circular, oval, or slit-shaped, and
- wherein the electrode is a current collector free electrode.
2 more elements
Dependencies are inferred from the claim text.