Samsung Sdi Co., Inc.

Hyun-Sook Jung

Geun-Bae Kim

Ho-Jin Kweon

Yong-Chul Park

Jun-Won Suh

Jae-Phil Cho

Dong-Gon Park

Wan-Seog Oh

Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes at least one compound represented by formulas 1 to 4 and a metal oxide or composite metal oxide layer formed on the compound.LiNiMnF&#x2003;&#x2003;(1)LiNiMnS&#x2003;&#x2003;(2)LiNiMnMOF&#x2003;&#x2003;(3)LiNiMnMOS&#x2003;&#x2003;(4)(where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, 0.95&#x2266;x&#x2266;1.1, 0&#x3c;y&#x2266;0.99, 0&#x2266;z&#x2266;0.5, and 0&#x2266;a&#x2266;0.5).

Positive active material for rechargeable lithium battery and method of preparing same

A positive active material composition for a rechargeable lithium battery includes at least one lithiated compound, and at least one additive compound selected from the group consisting of a thermal-absorbent element-included hydroxide, a thermal-absorbent element-included oxyhydroxide, a thermal-absorbent element-included oxycarbonate, and a thermal-absorbent element-included hydroxycarbonate.

Positive active material composition for rechargeable lithium batteries

Disclosed is a positive active material for a lithium rechargeable battery, a method of preparing the same, and a lithium rechargeable battery comprising the same. The positive active material has an I/Iintensity ratio of between 1.15 to 1 and 1.21 to 1 in an X ray diffraction pattern using CuK&#x3b1; ray, wherein I/Iis the X-ray diffraction intensity of the (003) plane divided by the X-ray diffraction intensity of the (104) plane. The compound is represented by the formula:LiNiCoMnXO

Positive active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same

Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes at least one compound represented by formulas 1 to 4:LiNiMnF&#x2003;&#x2003;(1)LiNiMnS&#x2003;&#x2003;(2)LiNiMnMOF&#x2003;&#x2003;(3)LiNiMnMOS&#x2003;&#x2003;(4)where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, 0.95&#x2266;x&#x2266;1.1, 0&#x3c;y&#x2266;0.99, 0&#x2266;z&#x2266;0.5, and 0&#x2266;a&#x2266;0.5; and a metal oxide or composite metal oxide layer formed on the compound.

Method of preparing positive active material for rechargeable lithium battery

Disclosed is a positive active material for a lithium secondary battery having high capacity and long durability properties and particularly to a powder of Li Ni C O M O , Li Ni C O M O F or Li Ni C O M O S (where M is a metal selected from the group consisting of Al, Mg, Sr, La, Ce, V, and Ti and wherein 0&lE;0.99, 0.01&lE;y&lE;0.1, 0.01&lE;z&lE;0.1, and 1.00&lE;a&lE;1.1) is surface-treated by a metal alkoxide solution whereby the durability, capacity and structural safety of said positive active material is increased.

Positive active material for lithium secondary batteries and method of preparing the same

Disclosed is a positive active material for a lithium secondary battery having high capacity and long durability properties, and particularly to a powder of LiaNi1&minus;x&minus;yCoxMyO2&minus;zFz and LiaNi1&minus;x&minus;yCoxMyO2&minus;zSz (where M is a metal selected from the group consisting of Al, Mg, Sr, La, Ce, V, and Ti, and wherein 0&lE;x<0.99, 0.01&lE;y&lE;0.1, 0.01&lE;z&lE;0.1, and 1.00&lE;a&lE;1.1) an oxygen in LiaNi1&minus;x&minus;yCoxMyO2 is substituted with F or S whereby the durability, capacity and structural safety of the positive active material is increased.

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Cheonan, South Korea

Hyun-Sook Jung