Samsung Sdi Co., Inc.

Seoul National University

Kijun Kim

Heeeun Yoo

Yeonhee Yoon

Kyuseo Lee

Jaehwan Ha

Dongmyung Lee

Junghyun Nam

Youngsan Ko

Junsik Lee

Dongho Son

Jiwon Park

Jun Ho Lee

Hoon Seok

Seung-Hun Han

Byongchul Woo

Minjae Kim

Bokkyu Jeon

Dong-Ho Son

Hyo-Jung Song

Kisuk Kang

Yuhyun Kim

Hoyong An

Chaewoong Cho

Nari Seo

Seunghyup Ha

Suyoun Yoon

Junkyu Cha

Woonsuk Jang

Beom Kwon Kim

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case connected to the first electrode to house the electrode assembly and including an opening to expose the electrode assembly; a cap plate coupled with the case to cover an outer region of the opening and including a through-hole to expose a center region of the opening; and a terminal plate bonded to and insulated from the cap plate to cover the through-hole and connected to the second electrode, and the outer surface of the case has a first protrusions-and-depressions shape.

Button cell

Disclosed is a rechargeable lithium battery including a positive electrode including a positive active material layer; and a negative electrode including a negative active material layer and a negative functional layer on the negative active material layer, wherein the functional layer includes flake-shaped polyethylene particles, and the positive active material layer includes a first positive active material including one or more composite oxides of lithium and a metal selected from cobalt, manganese, nickel, and a combination thereof, and a second positive active material including a compound represented by Chemical Formula 1 and. In Chemical Formula 1, 0.90≤a≤1.8, 0≤x≤0.7, and M is Mg, Co, Ni, or a combination thereof.LiFeMPO  Chemical Formula 1

Rechargeable lithium battery

Provided are a cathode for a secondary battery, a manufacturing method therefor, and a lithium secondary battery comprising same, the cathode comprising: a cathode current collector; a first layer which is arranged on at least one surface of the cathode current collector and which comprises a first cathode active material; and a second layer which is arranged on the first layer and which comprises a second cathode active material, wherein the first cathode active material is represented by the following chemical formula 1, the second cathode active material is represented by the following chemical formula 1 or 2, and the first cathode active material and the second cathode active material are different from each other.LiNiMO  <Chemical formula 1>LiCoM'1O  <Chemical formula 2> See the Detailed Description of the Invention for the definitions of x, y, a, p, M and M′ in the formulas.

Cathode for lithium secondary battery, manufacturing method therefor, and lithium secondary battery comprising same

An electrode for a rechargeable lithium battery includes a current collector and an active material layer on the current collector, wherein the active material layer includes flake-shaped polyethylene particles, and the flake-shaped polyethylene particles have an average particle size (D50) of about 1 &#x3bc;m to about 8 &#x3bc;m. A rechargeable lithium battery includes the electrode including the flake-shaped polyethylene particles.

Electrode for rechargeable lithium battery, and rechargeable lithium battery including the same

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.

Disclosed is a rechargeable lithium battery including a positive electrode including a positive active material layer; and a negative electrode including a negative active material layer and a negative functional layer on the negative active material layer, wherein the functional layer includes flake-shaped polyethylene particles, and the positive active material layer includes a first positive active material including one or more composite oxides of lithium and a metal selected from cobalt, manganese, nickel, and a combination thereof, and a second positive active material including a compound represented by Chemical Formula 1 and. In Chemical Formula 1, 0.90&#x2264;a&#x2264;1.8, 0&#x2264;x&#x2264;0.7, and M is Mg, Co, Ni, or a combination thereof.LiFeMPO&#x2003;&#x2003;[Chemical Formula 1]

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.

Disclosed are an electrode for a rechargeable lithium battery and a rechargeable lithium battery. The electrode includes a current collector, a first active material layer, and a second active material layer. The first active material layer is formed on the current collector and includes a first active material. The second active material layer is formed on the first active material layer. The second active material layer includes a second active material having an active material and a meltdown polymer disposed on the surface of the active material.

Electrode and a rechargeable lithium battery including the electrode

An electrode assembly and a rechargeable battery including the same are disclosed. The electrode assembly includes a plurality of unit cells overlapping in a thickness direction of the plurality of unit cells and a functional unit cell disposed with the plurality of unit cells. The functional unit cell includes a positive electrode. The positive electrode includes a positive current collector, a positive active material layer on at least one surface of the positive current collector and including a positive active material having a first reference potential, and a functional layer on the positive active material layer and including an active material having a lower reference potential than the first reference potential.

Electrode assembly and rechargeable battery including same

Disclosed are a negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative active material has an N/P ratio, which is a ratio of a maximum capacity per a unit area of a negative active material relative to maximum capacity per a unit area of a positive active material, ranging from about 1.5 to about 2. The negative active material includes a composite particle of silicon (Si) and carbon and crystalline carbon. A content of the Si is about 3 wt % to about 15 wt % based on a total weight of the negative active material.

Negative active material for rechargeable lithium battery and rechargeable lithium battery including same

An electrode assembly and rechargeable battery, the electrode assembly including a first electrode including a first sub-electrode in which an active material is on both surfaces of a base substrate, a second sub-electrode in which the active material is on one surface of the base substrate, and a first electrode uncoated region extending from the first sub-electrode; a second electrode including a third sub-electrode in which an active material is on both surfaces of a base substrate, a fourth sub-electrode in which the active material is on one surface of the base substrate, and a second electrode uncoated region extending from the third sub-electrode; and a separator between the electrodes, wherein the active material at the third sub-electrode includes a protruding portion protruding therefrom, and a distance from the end of the active material at sides based on the third sub-electrode to the protruding portion is 0 to 3 mm.

Growing community of inventors

Yongin-si, South Korea

Kijun Kim