Samsung Sdi Co., Inc.

Jung-Woo An

Sumihito Ishida

Kyeu-Yoon Sheem

Jin-Man Jeoung

Eui-Hwan Song

Jeong-Woo Han

Dae-Seop Lim

Jeong-Tae Kim

Da-Woon Han

Young-Kee Kim

Bok-Hyun Ka

Joon-Kil Son

Ishida Sumihito

A positive electrode for a rechargeable lithium battery, includes a current collector including pores on a surface thereof; and a positive active material layer on the current collector and including a positive active material, the positive active material including a lithium metal compound including primary particles and secondary particles including agglomerations of the primary particles, an average diameter of the pores of the current collector being greater than an average particle diameter (D50) of the primary particles and less than an average particle diameter (D50) of the secondary particles.

Positive electrode for rechargeable lithium battery and rechargeable lithium battery including the same

A rechargeable lithium battery includes a negative electrode and a positive electrode, where a specific surface area per a unit area of the positive electrode is twice to seven times larger than a specific surface area per a unit area of the negative electrode. The rechargeable lithium battery has high rate capability and improved cycle-life characteristics.

Rechargeable lithium battery

A positive electrode for a rechargeable lithium battery includes a positive active material and activated carbon, wherein an average particle diameter of the activated carbon is about 100% to about 160% relative to 100% of an average particle diameter of the positive active material.

Positive active material for rechargeable lithium battery and rechargeable lithium battery

A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.

Rechargeable lithium battery with controlled particle size ratio of activated carbon to positive active material

A secondary battery includes an electrode assembly including a first non-coating portion and a second non-coating portion, a first current collector and a second current collector joined to the first non-coating portion and the second non-coating portion, respectively, a case that accommodates the electrode assembly, and a cap assembly that seals the case. The first current collector includes a first overlapping portion that overlaps and joins the first non-coating portion, the first overlapping portion having a length and a width, and the first non-coating portion having a length and a width. The length of the first overlapping portion is 30% to 70% of the length of the first non-coating portion, and the width of the first overlapping portion is 50% to 70% of the width of the first non-coating portion.

Secondary battery

A crystalline carbonaceous material with a controlled interlayer spacing and a method of manufacturing the same. In one embodiment, a crystalline carbonaceous material has a layered structure including a plurality of layers and where a filler is present between the layers. The layers with the filler have an interlayer spacing d002 at a (002) plane, and the interlayer spacing d002 is at or between 0.335 nm and 1 nm when its X-ray diffraction is measured using a CuK&#x3b1; ray.

Crystalline carbonaceous material with controlled interlayer spacing and method of preparing same

A secondary battery including a plurality of electrode assemblies including: a first electrode assembly including a first positive electrode active material; and a secondary electrode assembly including a second positive electrode active material; the first electrode assembly and the second electrode assembly being electrically connected to each other, the first positive electrode active material being different from the second positive electrode active material, and a discharge capacity ratio of the second electrode assembly being in a range of 25% to 80%, based on a total discharge capacity of the first electrode assembly and the second electrode assembly, is disclosed.

Disclosed is a positive electrode according to one embodiment of the present invention that includes a current collector and a positive active material layer on the current collector, wherein the positive active material layer includes a positive active material and activated carbon coated with a fibrous carbon material.

Positive electrode for rechargeable lithium battery and rechargeable lithium battery

In an aspect, a positive active material for a rechargeable lithium battery that includes a first positive active material; and a second positive active material including LiMnMO(M is selected from Co, Ni, Mn, Fe. Cu, V, Si, Al, Sn, Pb, Sn, Ti, Sr, Mg, Ca or a combination thereof; x is 0&#x2266;x&#x2266;1.0; and a is 0.9&#x2266;a&#x2266;1.1) is disclosed.

A positive active material for a rechargeable lithium battery includes a porous material including primary particles, and secondary particles including aggregates of a plurality of the primary particles. The porous material has a tap density of 0.3 to less than 1.0 g/cc. A positive electrode includes the positive active material. A rechargeable lithium battery includes the positive electrode including the positive active material.

Positive active material for rechargeable lithium battery, and positive electrode and rechargeable lithium battery including the same

Disclosed is a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode includes a current collector; and a positive active material layer disposed on the current collector and including a lithium vanadium oxide-based positive active material represented by the following Chemical Formula 1.LiVMO&#x2003;&#x2003;[Chemical Formula 1] In Chemical Formula 1,

Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same

Disclosed are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, and the positive electrode includes a current collector; and a positive active material layer including an additive which is LiVO(1&#x3c;x&#x3c;4) or a composite of LiVO(1&#x3c;x&#x3c;4) and metal oxide, and a positive active material, and being disposed on the current collector.

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Yongin-si, South Korea

Jung-Woo An