Samsung Sdi Co., Inc.

Samsung Display Devices Co., Ltd.

Jae-Yul Ryu

Jong-Hwa Lee

Yong-Chul Park

Duck-Chul Hwang

So-Hyun Hur

Jeom-Soo Kim

Euy-Young Jung

Sang-Young Yoon

Wan-Uk Choi

Joon-Sup Kim

Jea-Woan Lee

Seung-Hee Park

Wan-uk Choi

Yong-Sam Kim

Sang-Jin Kim

Sae-Weon Roh

Ki-Ho Kim

Kyou-Yoon Sheem

Young-Ugk Kim

In-Tae Mun

Jin-Hee Moon

Yong-Bum Lee

Chang-Keun Back

Jae-Kyung Kim

Tae-gon Kim

Jin-Bum Kim

Kyou-yoon Sheem

Young-Chang Lim

Hisaki Tarui

Hee-Joon Chun

Sang-Jim Kim

Kyoo-Yoon Shim

Sang-jin Kim

Jeong-ju Cho

Chang-Kuen Back

An electrolyte for a rechargeable lithium battery includes a non-aqueous organic solvent; a lithium salt; and an additive including vinylene carbonate, fluoroethylene carbonate, and a nitrile-based compound represented by Formula 1: 

Electrolyte for rechargeable lithium battery and rechargeable lithium battery

Disclosed is a rechargeable lithium battery that includes a positive electrode including a lithium nickel-based positive active material; a negative electrode including a negative active material; an electrolyte including a lithium salt and a non-aqueous organic solvent; and a separator including a polymer substrate and a hydroxide compound-containing coating layer disposed on the polymer substrate.

Rechargeable lithium battery

A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a current collector, an active material layer on the current collector and including an amorphous silicon oxide represented by SiO(0.95&#x3c;x&#x3c;1.7), and an SEI layer on the active material layer and including about 70 area % or more of protrusion parts having a size of about 5 nm to 300 nm during charging of the battery.

Lithium secondary battery

An electrolyte for a rechargeable lithium battery includes a non-aqueous organic solvent; a lithium salt; and an additive including vinylene carbonate, fluoroethylene carbonate, and a nitrile-based compound represented by Formula 1:  wherein n ranges from 1 to 12 and Rand Rare independently a halogen, a hydrogen, or an alkyl group. Further, the alkyl group can be CH, in which m ranges from 1 to 10. The electrolyte for a rechargeable lithium battery improves storage stability of the rechargeable lithium battery at a high temperature. And, a rechargeable lithium battery including the electrolyte has improved storage stability.

Electrolyte including an additive for rechargeable lithium battery and rechargeable lithium battery including same

The rechargeable lithium battery of the present invention includes a positive electrode including a positive active material, a negative electrode including a negative active material, and a non-aqueous electrolyte. The positive active material includes a core and a coating layer formed on the core. The core is made of a material such as LiCoM'O, and the coating layer is made of a material such as MPO. The electrolyte solution includes a nitrile-based additive. The rechargeable lithium battery of the present invention shows higher cycle-life characteristics and longer continuous charging time at high temperature.

The rechargeable lithium battery includes a positive electrode which includes a positive active material, a negative electrode, and an electrolyte which includes a non-aqueous organic solvent and a lithium salt. The positive active material includes a core including at least one of a compound represented by Formula 1 and a compound represented by Formula 2, and a surface-treatment layer which is formed on the core and includes a compound represented by Formula 3. The lithium salt includes LiPFand a lithium imide-based compound.LiNiCoMnMO&#x2003;&#x2003;(1)LiMnMO&#x2003;&#x2003;(2)M'PO&#x2003;&#x2003;(3)wherein each of M and M&#x2032; is independently selected from the group consisting of an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a transition element, a rare earth element, and combinations thereof, 0.95&#x2266;a&#x2266;1.1, 0&#x2266;b&#x2266;0.999, 0&#x2266;c&#x2266;0.999, 0&#x2266;d&#x2266;0.999, 0.001&#x2266;e&#x2266;0.2, 0.95&#x2266;h&#x2266;1.1, 0.001&#x2266;i&#x2266;0.2, 1&#x2266;y&#x2266;4, 0&#x2266;y&#x2266;7, and 2&#x2266;z&#x2266;30.

A rechargeable lithium battery including a positive electrode including a positive active material, a negative electrode including a negative active material, and a non-aqueous electrolyte including a non-aqueous organic solvent and a lithium salt. The positive electrode has an active-mass density of about 3.7 to 4.1 g/cc, and the non-aqueous electrolyte includes a nitrile-based compound additive, a non-aqueous organic solvent, and a lithium salt.

A positive electrode includes a current collector and a positive electrode active material layer. The positive electrode active material layer includes a positive electrode active material including a core including a compound LiCOMOand a surface-treatment layer. In the core compound, 0.95&#x2266;a&#x2266;1.1, 0.002&#x2266;b&#x2266;0.02, and M is one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Tl, Si, Ge, Sn, P, As, Sb, Bi, S, Se, Te, Po. The surface-treatment layer includes a compound including element of P, and one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Tl, Si, Ge, Sn, As, Sb, Bi, S, Se, Te, Po.

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

An electrode, for a rechargeable lithium battery, including a current collector; an active material layer disposed on the current collector; and a coating layer disposed on the active material layer. The coating layer includes a lithium ion conductive polymer and an inorganic material represented by Formula 1: MHPO, wherein M is an element selected from the group consisting of an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a transition element, a rare earth element, and a combination thereof; and 1&#x2266;w&#x2266;4, 0&#x2266;x&#x2266;4, 1 &#x2266;y&#x2266;7, and 2&#x2266;z&#x2266;30.

Electrode for rechargeable lithium battery and rechargeable lithium battery including same

A secondary battery may be manufactured with an electrode assembly having a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. A container encases the electrode assembly. A hole formed on one end of the container with a stepped configuration that opens with different diameters on opposite sides of a cap plate and a safety valve mounted in the stepped surface of the hole, is configured to rupture and tear open upon occurrence of a predetermined internal battery pressure.

Secondary battery, cap assembly thereof and method of mounting safety valve therefor

A positive electrode including a current collector; a positive active material layer disposed on the current collector; and a coating layer disposed on the positive active material layer. The coating layer includes a binder and a inorganic additive. The binder is a poly(vinylidenefluoride-hexafluoropropylene) copolymer comprising 2 to 16 mole % of hexafluoropropylene. The positive electrode for a rechargeable lithium battery suppresses side-reactions between a positive electrode and an electrolyte, at a high voltage.

A secondary battery includes an electrode assembly including a positive electrode and a negative electrode, and a separator interposed therebetween. Each of the positive and negative electrodes have uncoated regions without active material along an edge. A container is also included for receiving the electrode assembly. A cap assembly is fixed to the container to seal the container. A lead element covers an entire surface of an uncoated region to contact and combine with the uncoated region. A tab extends from the lead element to be disposed within the range of the lead element.

Secondary battery

A negative electrode active material for a lithium-based secondary battery includes a crystalline artificial graphite having an intensity ratio I(110)/I(002) of an X-ray diffraction peak intensity I(002) at a (002) plane to an X-ray diffraction peak intensity I(110) at a (110) plane of less than 0.2.

Negative electrode active material for lithium-based secondary battery and method of preparing same

A negative electrode active material for a lithium-based secondary battery includes a graphite-like carbon material having an intensity ratio I()/I() of an X-ray diffraction peak intensity I() at a () plane to an X-ray diffraction peak intensity I() at a () plane of less than 0.2.

Growing community of inventors

Yongin-si, South Korea

Jae-Yul Ryu