公开(公告)号：US20130299735A1

公开(公告)日：2013-11-14

申请号：US13853141

申请日：2013-03-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon CHUNG ,  Byung Won CHO ,  Won Young CHANG ,  Jae Hyung CHO ,  Jae-kyo NOH ,  Soo KIM ,  Sujin KIM

IPC: H01M4/04

CPC classification number: H01M4/0497 ,  B82Y30/00 ,  C01G45/125 ,  C01G53/50 ,  C01P2002/52 ,  C01P2002/85 ,  C01P2004/04 ,  C01P2004/64 ,  C01P2004/84 ,  H01M4/0471 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525

Abstract: Disclosed is a method of producing a nanocomposite cathode active material for a lithium secondary battery, represented by the following formula: xLi2MnO3—(1−x)LiMO2 wherein M is Nia—Mnb—Coc, x is a decimal number from 0.1 to 0.9, and a, b and c are independently a decimal number from 0.05 to 0.9. The method includes mixing a lithium compound with a manganese compound to prepare Li2MnO3 as a first cathode active material, mixing a mixed solution of nickel sulfate/manganese sulfate/cobalt sulfate, a sodium hydroxide solution and aqueous ammonia to prepare a coprecipitated hydroxide represented by (Nia—Mnb—Coc)(OH)2 wherein a, b and c are as defined above, mixing the coprecipitated hydroxide with a lithium compound to prepare a second cathode active material represented by LiMO2 wherein M is as defined above, and mixing the first cathode active material with the second cathode active material. The nanocomposite cathode active material has improved electrochemical properties, such as stability, electrode capacity and cycle life in the high-voltage region.

Abstract translation: 公开了一种制备用于锂二次电池的纳米复合阴极活性材料的方法，由下式表示：xLi2MnO3-（1-x）LiMO2其中M是Nia-Mnb-Coc，x是0.1至0.9的十进制数， 和a，b和c独立地为0.05至0.9的十进制数。 该方法包括将锂化合物与锰化合物混合以制备Li2MnO3作为第一正极活性物质，混合硫酸镍/硫酸锰/硫酸钴，氢氧化钠溶液和氨水的混合溶液，制备由（ Nia-Mnb-Coc）（OH）2，其中a，b和c如上所定义，将共沉淀的氢氧化物与锂化合物混合以制备由LiMO2表示的第二正极活性物质，其中M如上所定义， 阴极活性材料与第二阴极活性材料。 纳米复合阴极活性材料具有改善的电化学性能，例如高压区域的稳定性，电极容量和循环寿命。

公开(公告)号：US20140057175A1

公开(公告)日：2014-02-27

申请号：US13742108

申请日：2013-01-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon CHUNG ,  Byung Won CHO ,  Won Young CHANG ,  Jae Hyung CHO ,  Jae-kyo NOH ,  Soo KIM ,  Sujin KIM

IPC: H01M4/505 ,  H01M4/36

CPC classification number: H01M4/505 ,  C01G45/125 ,  C01G53/50 ,  C01P2004/04 ,  C01P2004/64 ,  C01P2004/84 ,  H01M4/366 ,  H01M4/525

Abstract: Provided is a cathode active material for a lithium secondary battery and a method for preparing the same. The cathode active material for a lithium secondary battery allows a lithium secondary battery to realize high capacity and to maintain maximum capacity even at high voltage, prevents a drop in capacity during repeated charge/discharge cycles, and improves the lifespan of a lithium secondary battery.

Abstract translation: 本发明提供一种锂二次电池用正极活性物质及其制备方法。 用于锂二次电池的阴极活性材料允许锂二次电池实现高容量并且即使在高电压下也能保持最大容量，防止重复充电/放电循环期间的容量下降，并且提高锂二次电池的寿命。