Samsung Sdi Co., Inc.

Hideaki Maeda

Naoya Kobayashi

Sung-Soo Kim

Tetsuo Tokita

Geun-Bae Kim

Won-Il Jung

Hironari Takase

Akira Takamuku

Masaki Koike

Sung-Soo Samsung Sdi Co Ltd Legal & Ip Team Kim

A separator for non-aqueous rechargeable lithium batteries and a non-aqueous rechargeable lithium battery including the separator are provided. The separator includes a separator body and a composite including an organic compound and an inorganic compound supporting the separator body, where the organic compound has a higher melting point than that of the material composing the separator body, and the inorganic compound includes an element selected from the group consisting of 1A, 2A, 3A, 4A, 3B, and 5B elements from the periodic table, and combinations thereof, and at least one moiety selected from the group consisting of oxides, hydroxides, carbonates, phosphates, sulfates, nitrates, alkoxides, and combinations thereof.

Separator for non-aqueous rechargeable lithium battery

A rechargeable lithium ion battery including a positive electrode a positive active material and including a negative electrode having a negative active material. The positive active material includes a lithium-manganese-based compound core and a heat resistant polymer disposed on the lithium-manganese-based compound core. The heat resistant polymer has a glass transition temperature (Tg) ranging from about 80 to about 400&#xb0; C. Alternatively, the positive active material may include a lithium-manganese-based compound core and an inorganic metal compound as well as the heat resistant polymer with a glass transition temperature (Tg) ranging from about 80 to about 400&#xb0; C. disposed on the lithium-manganese-based compound core.

Positive electrode for lithium ion secondary battery and lithium ion secondary battery including same

The method of preparing a negative active material for a non-aqueous electrolyte rechargeable battery includes mixing a vanadium compound and a lithium compound and then subjecting the mixture to first firing to obtain Li(VM)Ohaving a layered halite type structure (where 0.5&#x2266;x&#x2266;1.0, 0&#x2266;y&#x2266;0.5, x+y=1, and M is selected from the group consisting of group 2 to 15 elements of the periodic table and combinations thereof); and adding a lithium compound to the Li(VM)Oand then subjecting the resultant to second firing. The negative active material for a non-aqueous electrolyte rechargeable battery prepared according to the preparing method has high crystallinity, and excellent charge and discharge characteristics at a high rate.

Preparing method of negative active material for non-aqueous electrolyte secondary battery and negative active material prepared thereby

A negative electrode for a rechargeable lithium battery includes a current collector and a negative active mass disposed on the current collector. The negative active mass includes a negative active material including a lithium vanadium composite oxide and a crystalline structure aid for inhibiting deterioration of a crystalline structure. The negative active material can inhibit an irreversible crystalline structure change during charge and discharge, and does not incur decomposition of an electrolyte resulting in improvement of a cycle-life of a rechargeable lithium battery.

Growing community of inventors

Osaka, Japan

Hideaki Maeda