摘要:
The present invention provides a powdery composite precursor, which comprises a core of a lithium transition metal oxide, and an aluminum hydroxide-based precipitate layer coated on the surface of the core, and a process to prepare the composite precursor. The preparation process comprises the formation of a water based slurry by dispersing lithium transition metal oxide powder in water, and a precipitation reaction of an aluminum salt solution with a base solution where the lithium transition metal particles act as seed particles, whereby a mechanically stable precipitate layer of homogeneous thickness can be achieved. The composite precursor can be converted into aluminum-containing, e.g., aluminum-doped, lithium transition metal oxide suitable for a cathode active material of lithium rechargeable battery by heat treatment.
摘要:
The present invention provides a powdery composite precursor, which comprises a core of a lithium transition metal oxide, and an aluminum hydroxide-based precipitate layer coated on the surface of the core, and a process to prepare the composite precursor. The preparation process comprises the formation of a water based slurry by dispersing lithium transition metal oxide powder in water, and a precipitation reaction of an aluminum salt solution with a base solution where the lithium transition metal particles act as seed particles, whereby a mechanically stable precipitate layer of homogeneous thickness can be achieved. The composite precursor can be converted into aluminum-containing, e.g., aluminum-doped, lithium transition metal oxide suitable for a cathode active material of lithium rechargeable battery by heat treatment.
摘要:
The present invention provides a powdered lithium transition metal oxide useful as a major component for cathode active material of rechargeable lithium batteries, comprising a lithium transition metal oxide particle, a doped interface layer formed near the surface of the particle, and a thermodynamically and mechanically stable outer layer, and a method of preparing the same.
摘要:
The present invention provides a powdery composite precursor, which comprises a core of a lithium transition metal oxide, and an aluminum hydroxide-based precipitate layer coated on the surface of the core, and a process to prepare the composite precursor. The preparation process comprises the formation of a water based slurry by dispersing lithium transition metal oxide powder in water, and a precipitation reaction of an aluminum salt solution with a base solution where the lithium transition metal particles act as seed particles, whereby a mechanically stable precipitate layer of homogeneous thickness can be achieved. The composite precursor can be converted into aluminum-containing, e.g., aluminum-doped, lithium transition metal oxide suitable for a cathode active material of lithium rechargeable battery by heat treatment.
摘要:
The present invention provides a powdered lithium transition metal oxide useful as a major component for cathode active material of rechargeable lithium batteries, comprising a lithium transition metal oxide particle, a doped interface layer formed near the surface of the particle, and a thermodynamically and mechanically stable outer layer, and a method of preparing the same.
摘要:
Provided is a cathode active material containing a Ni-based lithium mixed transition metal oxide. More specifically, the cathode active material comprises the lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M, x and y are as defined in the specification, which is prepared by a solid-state reaction of Li2CO3 with a mixed transition metal precursor under an oxygen-deficient atmosphere, and has a Li2CO3 content of less than 0.07% by weight of the cathode active material as determined by pH titration. The cathode active material in accordance with the present invention and substantially free of water-soluble bases such as lithium carbonates and lithium sulfates and therefore has excellent high-temperature and storage stabilities and a stable crystal structure. A secondary battery comprising such a cathode active material exhibits a high capacity and excellent characteristics, and can be produced by an environmentally friendly method with low production costs and high production efficiency.
摘要翻译:提供含有Ni基锂混合过渡金属氧化物的正极活性物质。 更具体地说,阴极活性材料包括具有由Li x Mn 2 O的式I表示的组成的锂混合过渡金属氧化物,其中M,x和y如说明书中所定义,其通过Li 2 CO 3与混合的固态反应 过氧化物金属前体,并且通过pH滴定测定,Li2CO3含量小于正极活性物质的0.07重量%。 根据本发明的阴极活性材料,基本上不含碳酸锂和硫酸锂等水溶性碱,因此具有优异的高温保存稳定性和稳定的晶体结构。 包含这种正极活性物质的二次电池显示出高容量和优异的特性,并且可以通过环保的方法生产,生产成本低,生产效率高。
摘要:
The present invention provides for a process of making a Ni-based lithium transition metal oxide cathode active materials used in lithium ion secondary batteries. The cathode active materials are substantially free of Li2CO3 impurity and soluble bases.
摘要翻译:本发明提供了制造用于锂离子二次电池的Ni基锂过渡金属氧化物正极活性物质的方法。 阴极活性材料基本上不含Li 2 CO 3杂质和可溶碱。
摘要:
The present invention provides for a process of making a Ni-based lithium transition metal oxide cathode active materials used in lithium ion secondary batteries. The cathode active materials are substantially free of Li2CO3 impurity and soluble bases.
摘要:
Provided is a method for preparing a lithium mixed transition metal oxide, comprising subjecting Li2CO3 and a mixed transition metal precursor to a solid-state reaction under an oxygen-deficient atmosphere with an oxygen concentration of 10 to 50% to thereby prepare a powdered lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M, x and y are as defined in the specification. Therefore, since the high-Ni lithium mixed transition metal oxide having a given composition can be prepared by a simple solid-state reaction in air, using a raw material that is cheap and easy to handle, the present invention enables industrial-scale production of the lithium mixed transition metal oxide with significantly decreased production costs and high production efficiency. Further, the thus-produced lithium mixed transition metal oxide is substantially free of impurities, and therefore can exert a high capacity and excellent cycle stability, in conjunction with significantly improved storage stability and high-temperature stability.
摘要翻译:提供一种制备锂混合过渡金属氧化物的方法,包括在氧气浓度为10至50%的氧缺乏气氛下使Li 2 CO 3和混合过渡金属前体进行固态反应,从而制备混合的粉末状锂 具有由式I表示的组合物的过渡金属氧化物,其中M,x和y如说明书中所定义。 因此,由于具有给定组成的高Ni锂混合过渡金属氧化物可以通过在空气中简单的固态反应来制备,使用廉价且易于处理的原料,本发明使得能够工业规模生产 锂混合过渡金属氧化物的生产成本显着降低,生产效率高。 此外,这样制造的锂混合过渡金属氧化物基本上不含杂质,因此可以发挥高容量和优异的循环稳定性,同时显着提高储存稳定性和高温稳定性。
摘要:
Provided is a method for preparing a lithium mixed transition metal oxide, comprising subjecting Li2CO3 and a mixed transition metal precursor to a solid-state reaction under an oxygen-deficient atmosphere with an oxygen concentration of 10 to 50% to thereby prepare a powdered lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M, x and y are as defined in the specification. Therefore, since the high-Ni lithium mixed transition metal oxide having a given composition can be prepared by a simple solid-state reaction in air, using a raw material that is cheap and easy to handle, the present invention enables industrial-scale production of the lithium mixed transition metal oxide with significantly decreased production costs and high production efficiency. Further, the thus-produced lithium mixed transition metal oxide is substantially free of impurities, and therefore can exert a high capacity and excellent cycle stability, in conjunction with significantly improved storage stability and high-temperature stability.
摘要翻译:提供一种制备锂混合过渡金属氧化物的方法,包括在氧气浓度为10至50%的氧缺乏气氛下使Li 2 CO 3和混合过渡金属前体进行固态反应,从而制备混合的粉末状锂 具有由式I表示的组合物的过渡金属氧化物,其中M,x和y如说明书中所定义。 因此,由于具有给定组成的高Ni锂混合过渡金属氧化物可以通过在空气中简单的固态反应来制备,使用廉价且易于处理的原料,本发明使得能够工业规模生产 锂混合过渡金属氧化物的生产成本显着降低,生产效率高。 此外,这样制造的锂混合过渡金属氧化物基本上不含杂质,因此可以发挥高容量和优异的循环稳定性,同时显着提高储存稳定性和高温稳定性。