IP Library › Granted Patent US 12,368,159
Granted Patent B2
US 12,368,159 · App. 17/281,334 · Granted Jul 22, 2025

Particles comprising silicon and lithium

Inventors: Yinzhi Zhang (Charlotte, NC); Zhong Tang (Charlotte, NC)
Assignee: ALBEMARLE CORPORATION
H01M4/366H01M4/364H01M4/386H01M4/5825H01M4/587H01M10/0525H01M2004/021H01M2004/027
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Quick Facts
Patent No.
US 12,368,159
App. No.
17/281,334
Granted
Jul 22, 2025
Kind
B2
Abstract

This invention provides compositions comprising coated particles comprising silicon in which the coating is comprised of carbon and one or more lithium silicates, the coated particles comprising silicon having a carbon content of about 0.10 wt % or more and a lithium content of about 1 wt % or more, relative to the total weight of the coated particle. Processes for preparing these compositions are also provided.

Claims (7)

1. A composition comprising coated particles comprising silicon having a single coating comprised of carbon and one or more lithium silicates, the coated particles comprising silicon having a carbon content of about 0.10 wt % to about 10 wt % and a lithium content of about 1 wt % to about 15 wt %, relative to the total weight of the coated particles comprising silicon, wherein the single coating is formed from a wetted mixture comprising a liquid medium, a carbon precursor, and a lithium precursor, wherein lithium and carbon are in a lithium:carbon ratio of about 2:1 to about 50:1 by weight, and wherein the coated particles comprising silicon have an average particle size in the range of about 0.05 micron to about 25 microns.

2. An anode having an active material comprising coated particles comprising silicon as in claim 1 .

3. A secondary battery comprising

an anode having an active material comprising coated particles comprising silicon as in claim 1 ,

a cathode,

a separator, and

an electrolyte solution.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 11, 2021
From: ZHANG, YINZHI; TANG, ZHONG
To: ALBEMARLE CORPORATION
Reel/Frame 056515/0697 →
Continuity (2)
Provisional Application 62744832 · Oct 12, 2018
Related Publication 20210399288A1 · Dec 23, 2021
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