Loading patent…
AssigneeDaejoo Electronic Materials Co., Ltd.
InventorsHeon Soo PARK, Seung Min OH, Dae Woon PARK, Sung Soo KIM, Seul Gi LEE, Jong Chan LIM
Estimating the term…
A silicon-carbon composite of the present invention comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide includes silicon particles, silicon oxide, magnesium silicate, and a lithium silicon compound. By comprising two or more carbon layers including a first carbon layer and a second carbon layer, the silicon-carbon composite can improve the performance of a secondary battery, such as slurry stability and initial charge/discharge characteristics, when used as a negative electrode active material of the secondary battery. In addition, the first carbon layer and the second carbon layer of the silicon-carbon composite satisfy specific thickness ranges, and thus, the silicon-carbon composite can further improve the performance of a secondary battery, such as capacity, cycle characteristics, and initial charge/discharge characteristics, when used as a negative electrode active material of the secondary battery.
A silicon-carbon composite, which comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide comprises silicon particles, silicon oxide, magnesium silicate, and a lithium silicon compound, and the silicon-carbon composite comprises two or more carbon layers comprising a first carbon layer and a second carbon layer.
A silicon-carbon composite, which comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide comprises silicon particles, silicon oxide, and a lithium silicon compound, the silicon-carbon composite comprises two or more carbon layers comprising a first carbon layer and a second carbon layer, the first carbon layer has a thickness of 10 nm to 200 nm, and the second carbon layer has a thickness of 10 nm to 2,000 nm.
Dependencies are inferred from the claim text.