Samsung Sdi Co., Inc.

Jeom-Soo Kim

Jong-Hwa Lee

Yong-Chul Park

Duck-Chul Hwang

Euy-Young Jung

Jae-Yul Ryu

So-Hyun Hur

Geun-Bae Kim

Sae-Weon Roh

Won-Il Jung

Jin-Bum Kim

In-Tae Mun

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

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 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.

Rechargeable lithium battery

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.

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 rechargeable battery includes an electrode assembly having positive and negative electrodes and a separator interposed between the positive and negative electrodes, a case for receiving the electrode assembly, and a plurality of projections formed on an outer surface of the case.

Rechargeable battery and battery module

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

A rechargeable lithium battery includes a positive electrode including a positive active material being capable of intercalating and deintercalating lithium ions; a negative electrode including a negative active material being capable of intercalating and deintercalating lithium ions; and an electrolyte including a non-aqueous organic solvent and a lithium salt. The positive electrode has a positive active mass density of 3.65 g/cc or more, and the lithium salt includes lithium hexafluorophosphate (LiPF), lithium tetrafluoroborate (LiBF), and a lithium imide-based compound. The rechargeable lithium battery has high capacity, excellent cycle-life, and reliability at a high temperature.

Lithium battery with lithium salt mixture

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 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.

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Yongin-si, South Korea

Jeom-Soo Kim