Abstract: Provided are a lithium nickel manganese oxide composite material, a preparation method thereof and a lithium ion battery. The preparation method includes: a first calcining process is performed on a nano-oxide and a nickel-manganese precursor, to obtain an oxide-coated nickel-manganese precursor; and a second calcining process is performed on the precursor and a lithium source material, to obtain the lithium nickel manganese oxide, and a temperature of the first calcining process is lower than the second calcining process. A a lower temperature, the nano-oxide may be melted, a denser nano-oxide coating layer is formed on the surface of the precursor, so the oxide-coated nickel-manganese precursor is obtained. At a higher temperature, the nano-oxide, a nickel-manganese material and a lithium element may be more deeply combined. A problem that the nano-oxide layer is easy to fall off is solved, and cycle performance of the lithium nickel manganese oxide is greatly improved.

Abstract: Provided is a method for preparing a cobalt-free positive electrode material, the method comprising the following steps: (1) mixing lithium titanate and a metal source, carrying out a primary sintering treatment, adding a carbon source, and carrying out a secondary sintering treatment to obtain a carbon-coated, metal-doped lithium titanate additive; (2) mixing a lithium source with a cobalt-free precursor, and performing a high-temperature treatment to obtain a substrate material; and (3) mixing the carbon-coated, metal-doped lithium titanate additive with the substrate material, and then performing a heat treatment to obtain a cobalt-free positive electrode material. Further provided are a cobalt-free positive electrode material prepared by means of the preparation method, a positive electrode sheet including the positive electrode material, and a lithium-ion battery including the positive electrode sheet.

Abstract: A cobalt-free positive electrode material, a preparation method therefor, and an application thereof. The preparation method comprises: mixing a lithium source, a cobalt-free precursor NixMny(OH)2, a nickel source, and a manganese source, performing primary sintering and secondary coating and sintering, and obtaining a cobalt-free positive electrode material, wherein the nickel source comprises nickel oxide, the manganese source comprises at least one among manganese dioxide, manganese(II,III) oxide, and manganese(II) oxide, and the molar ratio of the nickel source to the manganese source is x/y.

Abstract: Provided in the present disclosure are a fluorine-doped lithium positive electrode material, a preparation method therefore and the use thereof. The preparation method includes: step S1, mixing and reacting NH4F, LixNiyMnzO2 and water to obtain an intermediate product system, which includes fluorine-modified LixNiyMnzO2; and step S2, carrying out first calcination on the fluorine-modified LixNiyMnzO2 in a first oxygen-containing gas, so as to obtain a fluorine-doped lithium positive electrode material, wherein x=1 to 1.3, y=0.1 to 0.9, z=0.1 to 0.9, and x:(y+z)=1.4 to 1.6. Doping with fluorine in a positive electrode material results in the oxygen in the material being protected by fluorine, such that the primary efficiency of a lithium-ion battery is effectively improved.

Abstract: The present application provides an iron-manganese-based positive electrode material, and a preparation method therefor and the use thereof. The iron-manganese-based positive electrode material is LiaFexMnyO2, wherein a=0.1-0.5, 0<x<1.0, 0<y<1.0, and x+y=1; the valence state of at least some of the manganese elements in the iron-manganese-based positive electrode material is positive tetravalence; and the maximum intensity of the characteristic peak of the Li2MnO3 crystal phase in the XRD spectrum of the iron-manganese-based positive electrode material is less than one third of the maximum characteristic peak intensity of the iron-manganese-based positive electrode material, or there is no characteristic peak of the Li2MnO3 crystal phase. In the present application, the initial efficiency and the cycling performance are further better improved by controlling the components and crystal structure of the iron-manganese-based positive electrode material.

Abstract: The present application provides an iron-manganese-based positive electrode material, and a preparation method therefor and the use thereof. The preparation method comprises the steps of: S1, subjecting an inorganic compound of lithium and a FexMny(OH)2 precursor to oxidation sintering to obtain an intermediate product, wherein 0<x<1.0, 0<y<1.0, and x+y=1, and the ratio of the molar amount of Li in the inorganic compound of lithium to the total molar amount of Fe and Mn in the FxMny(OH)2 precursor is (0.1-0.5):1; and S2, subjecting the intermediate product to a second sintering under nitrogen or first inert gas atmosphere conditions to obtain the iron-manganese-based positive electrode material.

Abstract: The present disclosure provides a cobalt-free and nickel-free positive electrode material and a preparation method therefor, and a battery. The preparation method includes: preparing a cobalt-free and nickel-free matrix material, and mixing the cobalt-free and nickel-free matrix material, a lithium source, and a divalent manganese compound for reaction to obtain the cobalt-free and nickel-free positive electrode material. By adding the divalent manganese compound, the generation of lamellar LiMnO2 and spinel LiMn2O4 is inhibited, the generation of lamellar Li2MnO3 is promoted, and the cycle performance of the material is improved.

Abstract: The disclosure provides a composite anode electrode material and a preparation method thereof, an anode electrode material and a lithium ion battery. The composite anode electrode material includes a defect-type transition metal oxide and a lithium titanate, wherein the lithium titanate is compounded with the defect-type transition metal oxide in the manner of coating and/or doping, the defect-type transition metal oxide is a secondary particle, and a transition metal element in the defect-type transition metal oxide is selected from any one of tungsten, yttrium and tin. The probability of a side reaction between the defect-type transition metal oxide and an electrolyte is greatly reduced and a volume expansion effect of an anode electrode of a battery in the process of deintercalating lithium ions is greatly reduced, thereby the lithium ion battery including the composite anode electrode material has a higher capacity retention rate after cycling.

Abstract: Provided are a cobalt-free positive electrode material, a preparation method thereof and a lithium ion battery. The preparation method includes: first sintering step is performed on a lithium source material and a cobalt-free precursor, to obtain a sintered product; the sintered product is crushed to 1 to 2 ?m, to obtain a cobalt-free single crystal material; and second sintering step is performed on the cobalt-free single crystal material, a boron coating agent and a carbon coating agent, to obtain the cobalt-free positive electrode material. The cobalt-free positive electrode material prepared by the above method has advantages of stable structure, high electric capacity, excellent current rate performance and good cycle performance and the like.

Abstract: A positive electrode material, a preparation method therefor and a lithium ion battery. The positive electrode material has a core-shell structure, the core layer comprises a cobalt-free single crystal positive electrode active material, and the shell layer comprises LiAlO2 and LiFePO4. By coating the surface of the cobalt-free single crystal positive electrode active material with LiAlO2 and LiFePO4, the conductivity of the cobalt-free single crystal layered positive electrode material is improved, thereby improving the capacity, the rate and the cyclability of the material.

Abstract: Provided are a lithium nickel manganese oxide composite material, a preparation method thereof and a lithium ion battery. The preparation method includes: a first calcining process is performed on a nano-oxide and a nickel-manganese precursor, to obtain an oxide-coated nickel-manganese precursor; and a second calcining process is performed on the precursor and a lithium source material, to obtain the lithium nickel manganese oxide, and a temperature of the first calcining process is lower than the second calcining process. At a lower temperature, the nano-oxide may be melted, a denser nano-oxide coating layer is formed on the surface of the precursor, so the oxide-coated nickel-manganese precursor is obtained. At a higher temperature, the nano-oxide, a nickel-manganese material and a lithium element may be more deeply combined. A problem that the nano-oxide layer is easy to fall off is solved, and cycle performance of the lithium nickel manganese oxide is greatly improved.

Abstract: A cobalt-free layered positive electrode material, a preparation method thereof, and a lithium-ion battery are provided. The method includes: preparing a layered lithium nickel manganese oxide matrix material; mixing the layered lithium nickel manganese oxide matrix material with a coating agent to obtain a first mixed material; and forming a coating layer on a surface of the layered lithium nickel manganese oxide matrix material by performing a first sintering treatment on the first mixed material to obtain the cobalt-free layered positive electrode material. The coating agent includes a first coating agent including ceramic oxide, and a second coating agent including at least one of phosphate and silicate.

Abstract: Provided are a cobalt-free positive electrode material for a lithium ion battery, a preparation method therefor and a lithium ion battery. The method for preparing the cobalt-free positive electrode material for the lithium ion battery comprises: mixing lithium nickel manganese oxide with sulfate, so as to obtain a first mixture; and reacting the first mixture at a predetermined temperature, so as to obtain the cobalt-free positive electrode material. The cobalt-free positive electrode material comprises lithium nickel manganese oxide and a cladding layer of an outer surface thereof, and the cladding layer comprises lithium sulphate. The lithium ion battery comprises the cobalt-free positive electrode material. The cobalt-free positive electrode material has a relatively high electrical performance and a relatively low alkali content.

Abstract: A composite positive electrode material for a lithium ion battery, a preparation method therefor, and a use thereof. The composite positive electrode material comprises a positive electrode material core and a halide coating layer that is coated on the surface of the positive electrode material core, wherein halide comprises Li3YX6, and X is at least one among halogens. By means of the coating of the halide coating layer, the ionic conductivity and structural stability of the positive electrode material are greatly increased, which reduces the surface impedance of the material.

Abstract: A cobalt-free single crystal composite material, and a preparation method therefor and a use thereof. The cobalt-free single crystal material is of a core-shell structure, the core layer is the cobalt-free single crystal material, and the shell layer is prepared from TiNb2O7 and conductive lithium salt. The TiNb2O7 and the conductive lithium salt are selected as materials of the shell layer to coat the cobalt-free single crystal material, thereby improving the lithium ion conductivity of the cobalt-free single crystal material, and further improving the capacity and the first effect of the material.

Abstract: A gradient doped cobalt-free positive electrode material and a preparation method therefor, a lithium-ion battery positive electrode, and a lithium battery. The positive electrode material consists of LiNixMnyAzO2. The content of element A in the positive electrode material decreases in a direction from a surface layer of the positive electrode material to the center, and A is one or more of Al, Zr, Ti, B, and W. The preparation method is easy to implement, simplifies roasting condition requirements, and provides a cobalt-free positive electrode material having good cycle performance.

Abstract: A cobalt-free positive electrode material and a preparation method therefor, a lithium ion battery positive electrode, and a lithium ion battery, relating to the technical field of lithium ion batteries. The positive electrode material comprises a core and a shell covering the core, the core being a cobalt-free positive electrode material, the chemical formula of the core being LiNixMnyO2, wherein 0.55?x?0.95 and 0.05?y?0.45, and the shell is a coating agent and carbon. The present method can improve the dispersibility of the cobalt-free positive electrode material during the coating process, and can also improve the conductivity of the cobalt-free positive electrode material.

Abstract: The present disclosure provides a cobalt-free cathode material of a lithium ion battery, a method for preparing the cobalt-free cathode material, and the lithium ion battery. A general formula of the cobalt-free cathode material is LixNiaMnbRcO2, wherein, 1?x?1.15, 0.5?a?0.95, 0.02?b?0.48, 0<c?0.05, and R is aluminum or tungsten. Therefore, as the cobalt-free cathode material is free of metal cobalt, the cost of the cathode material can be lowered effectively. Aluminum or tungsten in the cobalt-free cathode material can stabilize a crystal structure of the cathode material better, such that the lithium ion battery has excellent rate capability and cycle performance, and furthermore, good cycling stability of the lithium ion battery can be still maintained under a high-temperature and high-pressure testing condition.

Abstract: The present disclosure provides a cobalt-free lamellar cathode material and a method for preparing the cobalt-free lamellar cathode material, and a lithium ion battery. The cobalt-free lamellar cathode material is of a core-shell structure, and a material forming an outer shell of the core-shell structure comprises titanium nitride and a material forming an inner core of the core-shell structure does not comprise cobalt and is of a monocrystal structure. According to the cobalt-free lamellar cathode material provided by the present disclosure, the surface of the cobalt-free inner core is coated with highly conductive titanium nitride, such that while the price cost of the cathode material is lowered, the rate capability of the cathode material can be improved, and thus the rate capability of the cobalt-free cathode material is better.

Abstract: The present disclosure provides a cobalt-free lamellar cathode material of a lithium ion battery, a method for preparing the cobalt-free lamellar cathode material, and a lithium ion battery. The cobalt-free lamellar cathode material comprises lamellar nickel lithium manganate of monocrystal morphology and zinc oxide coated onto a surface of the nickel lithium manganate, wherein a general formula of the nickel lithium manganate is LiNixMn1?xO2, and 0.95. Therefore, manganese ions in nickel lithium manganate can be effectively prevented from being dissolved by an electrolyte of the lithium ion battery by coating the surface of the lamellar nickel lithium manganate of monocrystal morphology with zinc oxide, such that the specific capacity, the first time charge efficiency (first efficiency for short) and the cycle performance of the lithium ion battery can be further effectively improved.