Samsung Sdi Co., Inc.

Su-Yeong Park

Nam-Soon Choi

Kyoung-Han Yew

Doo-Kyoung Lee

Sung-Soo Kim

Wan-Uk Choi

Sang-min Lee

Kyoung-Han Ryu

Sung-soo Kim

Sang-Min Lee

A negative active material for a rechargeable lithium battery includes a core including an active material being capable of performing reversible electrochemical oxidation and reduction, and a coating layer on the surface of the core. The coating layer includes a reticular structure including &#x2014;O-M-O&#x2014; wherein M is selected Si, Ti, Zr, Al, or combinations thereof and an organic functional group linked to the M as a side chain. The organic functional group is selected from the group consisting of an alkyl group, a haloalkyl group, a substituted or unsubstituted aryl group, and combinations thereof. The negative active material for a rechargeable lithium battery according to the present invention can be applied along with an aqueous binder, and improve high capacity, good cycle-life, and particularly high capacity during charge and discharge at a high rate.

Negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same

A rechargeable lithium battery including: a negative electrode including lithium-vanadium-based oxide, negative active material; a positive electrode including a positive active material to intercalate and deintercalate lithium ions; and an electrolyte including a non-aqueous organic solvent, and a lithium salt. The lithium salt includes 0.7 to 1.2M of a first lithium salt including LiPF6; and 0.3 to 0.8M of a second lithium salt selected from the group consisting of LiBCOF, LiB(CO), LiN(SOC2F), LiN(SOCF), LiBF, LiClO, and combinations thereof.

Rechargeable lithium battery

Negative active materials, negative electrodes, and rechargeable lithium batteries are provided. A negative electrode according to one embodiment includes a non-carbon-based active material, a lithium salt having an oxalatoborate structure, and a high-strength polymer binder. The negative active material may include a non-carbon-based material and a coating layer on the non-carbon-based material. The coating layer includes a lithium salt having an oxalatoborate structure and a high-strength polymer binder. A rechargeable lithium battery including the negative electrode or negative active material has good cycle life characteristics and high capacity.

Negative electrode and negative active material for rechargeable lithium battery, and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery of the present invention includes a lithium-vanadium oxide core material being capable of performing reversible electrochemical oxidation and reduction, and an inorganic oxide coating layer disposed on the surface of the core material. The negative active material can improve stability at the interface between a negative electrode and an electrolyte, charge and discharge efficiency, and cycle-life, and can be applied along with all kinds of aqueous and non-aqueous binders.

Negative active material for rechargeable lithium battery, method of preparing thereof, and rechargeable lithium battery including the same

A rechargeable lithium battery including: a negative electrode comprising lithium-vanadium oxide having the following Formula 1 and being capable of intercalating and deintercalating lithium ions, and a carbon-based material; a positive electrode comprising a positive active material capable of intercalating and deintercalating lithium ions; and an electrolyte comprising a monomer including alkylene oxide and a reactive double bond, a lithium salt, and a non-aqueous organic solvent.LiMVO&#x2003;&#x2003;Chemical Formula 1 In Formula 1, 0.1&#x2266;x&#x2266;2.5, 0&#x2266;y&#x2266;0.5, 0.5&#x2266;z&#x2266;1.5, 0&#x2266;d&#x2266;0.5, and M is at least one metal selected from the group consisting of Al, Cr, Mo, Ti, W, and Zr.

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode for a rechargeable lithium battery includes a current collector, and a negative active material layer on the current collector. The negative active material layer includes an interpenetrating network network, and a negative active material in the interpenetrating network network. The interpenetrating network is formed by cross-linking a first polymer having a hydroxyl or amine group and a second polymer having a carboxylic acid group. The negative electrode for a rechargeable lithium battery minimizes volume expansion and imparts good cycle-life characteristics and initial formation efficiency.

Growing community of inventors

Suwon-si, South Korea

Su-Yeong Park