US 9,812,705 B2
Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same
Yoon Ah Kang, Daejeon (KR); Je Young Kim, Daejeon (KR); Yong Ju Lee, Daejeon (KR); Jin Hyong Lim, Daejeon (KR); Hoon Jeong, Daejeon (KR); and Ki Hwan Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Oct. 25, 2013, as Appl. No. 14/63,424.
Application 14/063,424 is a continuation of application No. PCT/KR2013/004644, filed on May 28, 2013.
Claims priority of application No. 10-2012-0057627 (KR), filed on May 30, 2012.
Prior Publication US 2014/0050981 A1, Feb. 20, 2014
Int. Cl. H01M 4/36 (2006.01); H01M 4/134 (2010.01); H01M 4/62 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/622 (2013.01); H01M 4/623 (2013.01); H01M 4/38 (2013.01); H01M 10/0525 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A negative electrode active material slurry comprising a negative electrode active material, a binder, and a solvent,
wherein the negative electrode active material comprises:
(a) a core including one or more non-carbon-based materials selected from the group consisting of silicon, nickel, germanium, and titanium; and
(b) a fluorine containing organic polymer coating layer formed uniformly on an entire surface of the core,
wherein a thickness of the fluorine containing organic polymer coating layer is in a range of 50 nm to 100 nm;
wherein the fluorine containing organic polymer coating layer comprises (a) an epoxy compound containing a fluorine component, (b) an acrylate-based compound containing a fluorine component, or (c) a silane-based compound containing a fluorine component;
wherein (a) the epoxy compound containing a fluorine component comprises a compound expressed as the following Chemical Formula 1:

OG Complex Work Unit Drawing
(b) the acrylate-based compound containing a fluorine component comprises a compound expressed as the following Chemical Formula 2:

OG Complex Work Unit Drawing
wherein R is a hydrogen or an alkyl group having carbon number of 1 to 2, n is an integer of 1 or 2, and m is 0 or an integer between 1 and 12; and
(c) the silane-based compound containing a fluorine component comprises a compound expressed as the following Chemical Formula 3:
CF3—(CF2)o—(CH2)p—SiCl3  Chemical Formula 3
wherein o is an integer between 1 and 12, and p is an integer of 1 or 2.