Samsung Sdi Co., Inc.

Kyeuyoon Sheem

Jinhyon Lee

Bokhyun Ka

Soonho Ahn

Junkyu Lee

Daeseop Lim

Donghyuk Chang

Hyejin Kwon

Soon Ho Ahn

Sangjun Lee

Na-Ri Seo

Eun-Hyung Choi

Ji-hoon Son

A negative electrode and a rechargeable lithium battery, the negative electrode including a current collector; and a negative active material layer on the current collector, the negative active material including a carbon negative active material; wherein: an electrode density of the negative electrode is in the range of about 1.0 g/cc to about 1.5 g/cc, and a DD (Degree of Divergence) value as defined by the following Equation 1 is about 24 or greater,DD (Degree of Divergence)=()*100  [Equation 1]

Negative electrode for a rechargeable lithium battery and rechargeable lithium battery including the same

A negative electrode and a rechargeable lithium battery, the negative electrode including a current collector; and a negative active material layer on at least one surface of the current collector, the negative active material layer including a carbon negative active material and a conductive agent, wherein the conductive agent includes at least one of a fiber-shaped conductive agent having a average length of about 1 μm to about 200 μm and a particle-shaped conductive agent having a average long diameter of about 1 μm to about 20 μm, and a DD (Degree of Divergence) value defined by Equation 1 is about 24 or greater:DD (Degree of Divergence)=()*100  [Equation 1] wherein, in Equation 1, Ia is a sum of peak intensities at non-planar angles measured by XRD using a CuKα ray, and Itotal is a sum of peak intensity at all angles measured by XRD using a CuKα ray.

Negative electrode for rechargeable lithium battery

A rechargeable battery that minimizes a current amount difference between a double-sided coated region and a single-sided coated region by increasing resistance of the single-sided coated region to be higher than that of the double-sided coated region in an electrode plate (e.g., a negative electrode plate). A rechargeable battery including: an electrode assembly including an electrode plate at opposite sides of a separator and spirally winding the separator and the electrode plates; and a pouch to accommodate the electrode assembly therein and to draw out an electrode tab connected to the electrode plates to the outside thereof. The electrode plate includes: a double-sided coated region having an active material on opposite sides of a substrate and a single-sided coated region having an active material on a single surface of the substrate, wherein resistance of the single-sided coated region is higher than that of the double-sided coated region.

Rechargeable battery

A negative electrode and a rechargeable lithium battery, the negative electrode including a current collector; and a negative active material layer on the current collector, the negative active material including a carbon negative active material; wherein: an electrode density of the negative electrode is in the range of about 1.0 g/cc to about 1.5 g/cc, and a DD (Degree of Divergence) value as defined by the following Equation 1 is about 24 or greater,(Degree of Divergence)=()*100&#x2003;&#x2003;[Equation 1]

An exemplary embodiment of the present invention provides a spiral-wound electrode assembly including: a negative electrode and a positive electrode, each of which is configured to include a substrate, and a first composite material and a second composite material formed on opposite surfaces of the substrate; and a separator disposed between the negative electrode and the anode, wherein the first composite material of the negative electrode is disposed farther away from a center of the electrode assembly than the second composite material of the negative electrode, and the first composite material of the negative electrode is oriented with respect to a first surface of the substrate of the negative electrode.

Electrode assembly and rechargeable battery including the same

A negative electrode and a rechargeable lithium battery, the negative electrode including a current collector; and a negative active material layer on the current collector, the negative active material including a carbon negative active material; wherein: an electrode density of the negative electrode is in the range of about 1.0 g/cc to about 1.5 g/cc, and a DD (Degree of Divergence) value as defined by the following Equation 1 is about 24 or greater,DD (Degree of Divergence)=()*100&#x2003;&#x2003;[Equation 1]

An electrode assembly including a separator between a positive electrode and a negative electrode. Each of the positive electrode and the negative electrode includes a base member and an active material layer at at least one side of the base member. The active material layer of the negative electrode includes an alternating arrangement of orientation portions and non-orientation portions. Each of the orientation portions is oriented to have a constant angle with respect to one side of the negative electrode.

A negative electrode and a rechargeable lithium battery, the negative electrode including a current collector; and a negative active material layer on at least one surface of the current collector, the negative active material layer including a carbon negative active material and a conductive agent, wherein the conductive agent includes at least one of a fiber-shaped conductive agent having a average length of about 1 &#x3bc;m to about 200 &#x3bc;m and a particle-shaped conductive agent having a average long diameter of about 1 &#x3bc;m to about 20 &#x3bc;m, and a DD (Degree of Divergence) value defined by Equation 1 is about 24 or greater:DD (Degree of Divergence)=()*100&#x2003;&#x2003;[Equation 1]

Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including the same

Disclosed are a negative electrode for a rechargeable battery and a rechargeable battery including the same. The negative electrode for a rechargeable battery according to an exemplary embodiment of the present invention includes a substrate and an active material layer including graphite formed on at least one surface of the substrate, wherein the active material layer includes an internal layer relatively adjacent to the substrate and a surface layer relatively away from the substrate and the internal layer and the surface layer have a degree of divergence (DD) defined by Equation 1 below, and the DD value of the surface layer is 6% to 50% of the DD value of the internal layer.DD(Degree of Divergence)=()&#xd7;100&#x2003;&#x2003;[Equation 1] (Ia is a sum value of peak intensities appearing at a non-planar angle when XRD is measured using a CuK&#x3b1; line, and Itotal is a sum value of peak intensities appearing at every angle when XRD is measured using the CuK&#x3b1; line).

Negative electrode for rechargeable battery and rechargeable battery including the same

A rechargeable lithium battery includes an electrolyte, a negative electrode, and a positive electrode. The negative electrode includes a negative active material layer on a negative current collector, and includes a carbon-based negative active material. The negative electrode having a Degree of Divergence (DD) value of about 19 to about 60. The positive electrode includes a positive active material layer and a positive current collector, and includes a positive active material and a porous structured additive. The content of the porous structured additive is about 0.01 wt % to about 2 wt % based on 100 wt % of the positive active material layer.

Rechargeable lithium battery

A negative electrode for a rechargeable lithium battery includes a negative active material layer on a current collector. The negative active material layer includes a carbon-based negative active material. A Degree of Divergence (DD) value of the negative electrode is greater than or equal to about 19. The DD value may be calculated based on the following equation:DD(Degree of Divergence)=()*100where Iis a sum of peak intensities at non-planar angles measured by XRD using a CuK&#x3b1; ray and Iis a sum of peak intensities at all angles measured by XRD using a CuK&#x3b1; ray.

Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including same

A method for manufacturing a negative electrode of a rechargeable battery includes coating a first active mass on a first surface of a substrate, aligning a first graphite material in the first active mass, and coating a second active mass on a second surface of the substrate. The second active mass includes a second graphite material. The method also includes aligning the second graphite material and pressing the first and second graphite material. The alignment operations are performed by applying magnetic fields, so that a first long axis of the first graphite material forms a first acute angle with the first surface and a second long axis of the second graphite material forms a second acute angle with the second surface. The second long axis is inclined in a direction facing the first long axis, with the substrate therebetween.

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Yongin-si, South Korea

Kyeuyoon Sheem