Beijing Easpring Material Technology Co., Ltd.

Yanbin Chen

Yafei Liu

Xuequan Zhang

Ming Wang

Jingpeng Wang

Hang Zhang

Yuqiang Jin

Shunlin Song

Wenbo Wang

Yongqiang Zhang

Wenhui Li

Shanshan Li

Bohao Zhang

Xueyuan Hou

Junfan Tong

Liguo Sun

Feijiang Chen

Ce Liang

Tianmeng Zhao

Yiseng Hu

A positive electrode material, a preparation method therefor, and an application thereof are disclosed. The cathode material is composed of secondary particles agglomerated by primary particles; wherein individual secondary particle contains an inner core structure, a middle layer, and a shell layer, in this order, along a direction from a center to a surface of the secondary particle; wherein the middle layer is distributed in a circular ring shape; and wherein the secondary particle has a structure of close packing of an inner core structure, loose and porous middle layer, and close packing of the shell layer.

Positive electrode material, preparation method therefor, and application thereof

The present disclosure discloses a lithium-manganese rich material and a preparation method and a use thereof.

Lithium-manganese rich material, preparation method therefor and use thereof

An iron manganese phosphate precursor, a lithium iron manganese phosphate positive electrode material and a method for preparation thereof, an electrode material, an electrode, and a lithium-ion battery are disclosed. The lithium iron manganese phosphate precursor is represented by (NH)MnFeMPOHO/C, wherein 0.1<x≤0.6 and 0≤y≤0.04, and M is selected from at least one of Mg, Co, Ni, Cu, Zn, and Ti. Lithium iron manganese phosphate positive electrode material prepared from the precursor is uniform in carbon coating, has a dense secondary spherical morphology, is high in compaction density, can improve the electrochemical performance of the lithium-ion battery when applied to the lithium-ion battery, is high in specific capacity and good in cycle performance.

Lithium iron manganese phosphate precursor, lithium iron manganese phosphate positive electrode material and preparation method therefor, electrode material, electrode, and lithium-ion battery

A single-crystal-type multi-element positive electrode material, and a preparation method therefor and an application thereof.

Single-crystal-type multi-element positive electrode material, and preparation method therefor and application thereof

The present disclosure relates to the technical field of secondary battery, and discloses a positive electrode material and a preparation method and use therefor, a lithium-ion battery positive electrode poly piece, and a lithium-ion battery.

Positive electrode material and preparation method and use therefor, lithium-ion battery positive electrode pole piece, and lithium-ion battery

The present disclosure relates to the technical field of positive electrode materials of lithium ion batteries. Disclosed a positive electrode material having a multi-cavity structure and a preparation method therefor, and a lithium ion battery. The positive electrode material is formed by aggregation of a plurality of primary particles, and some of the primary particles grow in an oriented manner to form supporting structures, the supporting structures overlapping each other inside the positive electrode material to form a plurality of cavities. The particle strength of the positive electrode material is significantly improved, so that the positive electrode material has the advantage of a long service life. In addition, the impedance of the positive electrode material is reduced, thereby improving the power performance of the positive electrode material.

Positive electrode material having multi-cavity structure and preparation method therefor, and lithium ion battery

The present disclosure relates to a positive electrode material for a lithium ion battery and its preparation. The positive electrode material in accordance with the present disclosure has an intrinsic specific surface area of 5-13 m/g. The positive electrode material in accordance with the present disclosure has an intrinsic specific surface area and an intrinsic pore size within the required ranges. In this regard, the positive electrode material in accordance with the present disclosure has excellent particle strength, excellent Li ion transference ability, and good resistance to electrolyte erosion. When used in lithium batteries, it may impart the batteries with excellent rate performance and cycle performance. The present disclosure also relates to a method for preparing the positive electrode material.

Positive electrode material of lithium-ion battery and preparation method therefor

Provided is a positive electrode material for a lithium ion battery, having the following general formula I: LiNiCoMnMM′OAgeneral formula I, wherein −0.05≤a≤0.3, 0.8≤x≤1, 0≤y≤0.2, 0≤z≤0.2, 0≤c≤0.01, 0≤d≤0.01, x+y+z+c+d=1, and 0≤b≤0.05; M and M′ are different from each other and each independently selected from at least one of La, Cr, Mo, Ca, Fe, Ti, Zn, Y, Zr, W, Nb, V, Mg, B, Al, Sr, Ba and Ta, A is selected from at least one of F, Cl, Br, I and S, and the number of crystallite boundaries N in primary particles of the positive electrode material is from 10.5 to 14.5, wherein N is calculated according to Equation I: N=D/DEquation I, wherein Dis an average size of the primary particles, as measured from scanning electron microscope (SEM) image of cross section of the positive electrode material, and Dis an average size of crystallites in the primary particles of the positive electrode material, as measured by an XRD test and calculated by the Scherrer equation. Also provided is a method for preparing the positive electrode material.

Positive electrode material for lithium ion battery and preparation method therefor

A sodium-containing oxide positive electrode material and a preparation method therefor and use thereof are disclosed. Also disclosed are a positive electrode plate and uses thereof.

Sodium-containing oxide positive electrode material and preparation method therefor and use thereof, and positive electrode plate and use thereof

Disclosed are a surface-coated positive electrode material and a preparation method therefor, and a lithium ion battery. The surface-coated cathode material contains a substrate and a coating layer coated on a surface of the substrate, and the coating layer has a bimodal distribution of characteristic peaks at 31°-35° of 2θ tested by X-Ray Diffraction (XRD); and a ratio I/Iof a peak intensity Iof a secondary peak to a peak intensity Iof a primary peak in a bimodal distribution is within a range of 0.8-1, preferably within a range of 0.97-1.

Surface-coated positive electrode material and preparation method therefor, and lithium ion battery

The present disclosure relates to the technical field of lithium ion battery, and discloses a Lithium-Manganese-rich material and a preparation method and a use thereof.

Lithium-manganese-rich material, preparation method for same, and applications thereof

A single crystal multi-element positive electrode material and a preparation method therefor, and a lithium ion battery. The ratio of the length of the longest diagonal line to the length of the shortest diagonal line of the single crystal particles of the single crystal multi-element positive electrode material measured by an SEM is roundness R, and R≥1; and D, Dand Dof the single crystal particles of the single crystal multi-element positive electrode material satisfy: K=(D−D)/D, and the product of Kand R is 1.20-1.40. The single crystal multi-element positive electrode material is more round and regular in morphology, the single crystal particles have uniform size, less agglomeration and less adhesion. The material has the characteristics of high compaction density, good rate capability and excellent cycle performance.

Single crystal multi-element positive electrode material, preparation method therefor, and lithium ion battery

A positive electrode material for a lithium ion battery and a preparation method therefor, and a lithium ion battery, relating to the technical field of secondary batteries. The positive electrode material comprises a high-nickel multi-element positive electrode material, the high-nickel multi-element positive electrode material is formed by agglomerating multiple primary grains, and the primary grains are distributed in a divergent shape along the diameter direction of the high-nickel multi-element positive electrode material, the aspect ratio L/R of the primary grains in the positive electrode material is greater than or equal to 3, and the radial distribution ratio of the primary grains in the positive electrode material is greater than or equal to 60%. The lithium ion battery containing the positive electrode material has high capacity and greatly improved particle strength.

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Beijing, China

Yanbin Chen