Xtc New Energy Materials (xiamen) Co., Ltd.

Guozhen Wei

Nengjian Xie

Zhen Lin

Lin Lin

Bolie Yu

Pengfeng Wang

Jingren Wang

Yaobin Ye

Leiying Zeng

The present invention discloses a lithium ion battery with high capacity, which comprises an cathode material, a anode material and an electrolyte. The cathode material has a chemical formula LiNiMeO, wherein x is 10to 10, and Me is a third metal other than Li and Ni. Said material has the advantages of high purity, high density and high delithiation capacity. The preparation method of the cathode material comprises: subjecting a nickel salt and an additive to chemical co-precipitation, calcining, and inducing of a crack structure with an inducing environment, an inducing chemical, or a combination thereof to give a precursor, which is mixed with LiO, sintered and crushed to give the cathode material. Through the inducing effect of the inducing environment or the inducing chemical, the crystal structure is changed, cracks are formed, and the volume of the crystal cell is further enlarged, so that lithium ions can react with NiO more sufficiently, thereby reducing the segregation, improving the purity and density of the prelithiating material, improving the delithiation capacity, and improving the overall electric capacity of the lithium ion battery.

Lithium ion battery with high capacity

A method for preparing ternary positive material in a lithium battery includes mixing nickel salt, cobalt salt, and manganese salt to form a mixed solution. A precipitant and a complexing agent are added into the mixed solution, thereby adjusting a pH value to a range of 10.5 to 12 and obtaining a precursor A. The precursor A and lithium salt are ground by a ball mill to obtain a precursor B, precursor B then being sintered in an air or oxygen atmosphere. The sintering includes heating at a first heating speed of 5 to 15° C./min to a first temperature of 400 to 800° C. and being held at such temperature for 1 to 6 h, and heating at a second heating speed of 1 to 10° C./min to a second temperature of 900 to 980° C. and being held there for 8 to 10 h.

Ternary positive material of large monocrystal-like particles, method for preparing the same, and lithium-ion battery having the same

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Xiamen, China

Guozhen Wei