Samsung Sdi Co., Inc.

Dongmyung Lee

Kijun Kim

Heeeun Yoo

Yeonhee Yoon

Kyuseo Lee

Jaehwan Ha

Seung-Hun Han

Junghyun Nam

Hoyong An

Sunghyun Choi

Beom Kwon Kim

A rechargeable lithium battery including an electrode assembly includes a positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector; a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer; and a separator, wherein the positive active material layer includes a first positive active material including at least one of a composite oxide of metal selected from cobalt, manganese, nickel, and a combination thereof and lithium and a second positive active material including a compound represented by Chemical Formula 1, the negative electrode functional layer includes flake-shaped polyethylene particles, and a battery capacity is greater than or equal to about 3.5 Ah.LiFeMPO&#x2003;&#x2003;[Chemical Formula 1] In Chemical Formula 1, 0.90&#x2264;a&#x2264;1.8, 0&#x2264;x1&#x2264;0.7, and M is Mn, Co, Ni, or a combination thereof.

Rechargeable lithium battery

A rechargeable lithium battery includes a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer; and positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector, wherein the negative electrode functional layer includes flake-shaped polyethylene particles, the positive active material layer includes a first positive active material including at least one of a composite oxide of a metal selected from cobalt, manganese, nickel, and a combination thereof and lithium, a second positive active material including a compound represented by Chemical Formula 1, and carbon nanotubes, and the carbon nanotubes have an average length of 30 &#x3bc;m to about 100 &#x3bc;m.LiFeMPO&#x2003;&#x2003;Chemical Formula 1 In Chemical Formula 1, 0.90&#x2264;a&#x2264;1.8, 0&#x2264;x1&#x2264;0.7, and M is Mn, Co, Ni, or a combination thereof.

A rechargeable lithium battery includes an electrode laminate including a positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector; a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer; and a separator, wherein the electrode laminate has a ratio (L/W) of a height (L), which is a length in a protruding direction of an electrode terminal, relative to a width (W), which is perpendicular to the protruding direction of the electrode terminal and parallel to the laminate surface, is about 1.1 to about 2.3, the positive active material layer includes a first positive active material including at least one of a composite oxide of a metal selected from cobalt, manganese, nickel, and a combination thereof and lithium and a second positive active material including a compound represented by Chemical Formula 1, the negative electrode functional layer includes flake-shaped polyethylene particles, and an operation voltage is greater than or equal to about 4.3 V.LiFeMPO&#x2003;&#x2003;[Chemical Formula 1] In Chemical Formula 1, 0.90&#x2264;a&#x2264;1.8, 0&#x2264;x1&#x2264;0.7, and M is Mn, Co, Ni, or a combination thereof.

A rechargeable lithium battery includes a positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector; and a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer, wherein the positive active material layer includes a first positive active material including at least one of a composite oxide of metal selected from cobalt, manganese, nickel, and a combination thereof and lithium and a second positive active material including at least one of compounds represented by Chemical Formula 1 to Chemical Formula 4, and the negative electrode functional layer includes flake-shaped polyethylene particles andLiMnM'A&#x2003;&#x2003;[Chemical Formula 1]LiMnM&#x2032;OX&#x2003;&#x2003;[Chemical Formula 2]LiMnOX&#x2003;&#x2003;[Chemical Formula 3]LiMnM&#x2032;M&#x2033;A&#x2003;&#x2003;[Chemical Formula 4]

A rechargeable lithium battery includes a positive electrode having a positive current collector and a positive active material layer at least partially disposed on the positive current collector, wherein the positive active material layer includes a first positive active material having at least one of a composite oxide of a metal selected from cobalt, manganese, nickel, and a combination thereof and lithium, and a second positive active material having a compound represented by Chemical Formula 1 as defined herein, and a negative electrode having a negative current collector, a negative active material layer at least partially disposed on the negative current collector, and a negative electrode functional layer having generally flake-shaped polyethylene particles at least partially disposed on the negative active material layer.

Rechargeable lithium battery includes a negative electrode including a negative active material layer and a negative electrode functional layer disposed on the negative active material layer; a positive electrode including a positive active material; an electrolyte solution, wherein the negative electrode functional layer includes flake-shaped polyethylene particles, the electrolyte solution includes a lithium salt and a non-aqueous organic solvent, and the non-aqueous organic solvent includes about 60 volume % to about 80 volume % of a propionate-based solvent and about 20 volume % to about 40 volume % of a carbonate-based solvent.

A secondary battery includes an electrode assembly, and a laminate exterior case accommodating the electrode assembly, the laminate exterior case including a pair of long side curve portions spaced apart from each other, a pair of short side curve portions spaced apart from each other, curvature radii of the long side curve portions being larger than those of the short side curve portions, and corner curve portions between respective long side curve portions and short side curve portions.

Growing community of inventors

Yongin-si, South Korea

Dongmyung Lee