Abstract: The present invention discloses a lithium ion battery with low capacity loss, which comprises an cathode material, a anode material and an electrolyte. The cathode material has a chemical formula Li(9x+2y+z)MnyMezO(3y+z)N2xX3x (xLi9N2X3·yLi2MnO3·zA), and has advantages such as stable performance, low surface residue, and high dilithiation capacity. The preparation of the cathode material comprises the steps of: synthesis of a precursor from a metal salt and a manganese compound by chemical co-precipitation, followed by, sequentially, heat treatment and crushing; and repeated lithium supplementation and multi-stage sintering to form the cathode material. The method for preparing the cathode material is simple. By repeated lithium supplementation and sintering, Li3N is inserted into the lattice of the material. Li9N2X3 forms a eutectic with the base material, which further reduces the surface residue, improves the storage and cycling performance of the material.

Abstract: 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 LiNi(1-x)MexO, wherein x is 10?6 to 10?1, 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 Li2O, sintered and crushed to give the cathode material.

Abstract: 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.