Abstract: The present invention provides a method for preparing a positive active material for a secondary lithium battery. The method includes the steps of: synthesizing an intermediate product of a core represented by formula LixMyN1-yO2-?A?; adding P source into the intermediate product to obtain a phosphate which does not contain lithium; and adding lithium source into the mixture of the phosphate and LixMyN1-yO2-?A? and sintering to obtain the positive active material for secondary lithium battery. The method for preparing a positive active material for a secondary lithium battery of the present invention has the following advantages: 1) the P source can be dispersed on the surface of the core more uniformly; 2) the coating layer can be bonded to the core more tightly; and 3) the positive active material has higher rate discharge performance.

Abstract: The present invention provides a positive active material for use in a secondary lithium battery, a method for preparing the positive active material and a secondary lithium battery containing the positive active material. The positive active material includes a core of lithium transition metal oxide represented by Formula LixMyN1-yO2-?A? and a coating layer of lithium transition metal silicate represented by Formula x?Li2O.y?N?Oa.SiO2-?B?which in-situ formed on the core, wherein 0.8?x?1.3, 0.6?y?1.0, 0.01?x??2.1, 0.2?y??1.5, 0.1?a?3.0, 0???0.2, 0???0.4, 0???0.5, 0???0.5. The positive active material according to the present invention has high capacity, desirable cycling performance and safety performance, as well as desirable thermal stability.

Abstract: The present invention provides a method for preparing a positive active material for a secondary lithium battery. The method includes the steps of: synthesizing an intermediate product of a core represented by formula LixMyN1-yO2-?A?; adding P source into the intermediate product to obtain a phosphate which does not contain lithium; and adding lithium source into the mixture of the phosphate and LixMyN1-yO2-?A? and sintering to obtain the positive active material for secondary lithium battery. The method for preparing a positive active material for a secondary lithium battery of the present invention has the following advantages: 1) the P source can be dispersed on the surface of the core more uniformly; 2) the coating layer can be bonded to the core more tightly; and 3) the positive active material has higher rate discharge performance.

Abstract: The present invention provides a positive active material for use in a secondary lithium battery, a method for preparing the positive active material and a secondary lithium battery containing the positive active material. The positive active material includes a core of lithium transition metal oxide represented by Formula LixMyN1-yO2-?A? and a coating layer of lithium transition metal silicate represented by Formula x?Li2O.y?N?Oa.SiO2-?B?which in-situ formed on the core, wherein 0.8?x?1.3, 0.6?y?1.0, 0.01?x??2.1, 0.2?y??1.5, 0.1?a?3.0, 0???0.2, 0???0.4, 0???0.5, 0???0.5. The positive active material according to the present invention has high capacity, desirable cycling performance and safety performance, as well as desirable thermal stability.

Abstract: The present invention provides a positive active material for use in a lithium ion battery, a method for preparing the positive active material and a lithium ion battery containing the positive active material. The positive active material includes a core of lithium containing transition metal oxide represented by Formula LixMyN1-yO2-?A? and a coating layer of lithium containing transition metal phosphate represented by Formula LiaMbN?1-bPO4-?B? in situ formed on the core, wherein 0.9?x?1.2, 0.6?y?1.0, 0.9?a?1.1, 0.6?b?1.0, 0???0.2, 0???0.4, 0???0.5, 0???0.5. The positive active material for use in a lithium ion battery according to the present invention has high capacity, desirable cycling performance and safety performance, as well as desirable thermal stability.

Abstract: The present disclosure provides a lithium-ion battery positive electrode material and a preparation method thereof.