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Ternary precursor with radial spherical top cone structure, positive electrode material and preparation method

A positive electrode material and radial technology, which is applied in the field of ternary precursors and positive electrode materials and preparations with radial spherical top cone structures, can solve the problems of uneven distribution of material particles, unstrict control of influencing factors, and low possibility of experiment repetition. , to achieve the effects of low raw material cost, stable Coulombic efficiency, and good cycle performance

Active Publication Date: 2021-09-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method combines part of the traditional co-precipitation process, and does not strictly control the influencing factors of the reaction process. Through simple reactions and repeated operations to make the crystal grow, the particle distribution of the obtained material is uneven, and the particle size varies greatly. low likelihood of repetition

Method used

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  • Ternary precursor with radial spherical top cone structure, positive electrode material and preparation method
  • Ternary precursor with radial spherical top cone structure, positive electrode material and preparation method
  • Ternary precursor with radial spherical top cone structure, positive electrode material and preparation method

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Embodiment 1

[0059] The cone portion of the ternary precursor of the radial-like spherical-top pyramid structure is a long strip of primary particles that grow radially, and the top of the sphere is an orderly stacked block-shaped primary particle that forms a secondary agglomerate; the radial The chemical formula of the ternary precursor of the spherical top-cone structure is Ni 1 / 3 Co 1 / 3 Mn 1 / 3 (OH) 2 ; the average length of the elongated primary particles is 10 μm; the average particle size of the surface layer bulk primary particles is 2 μm, and the average thickness of the stacking is 3 μm.

[0060] like figure 1 As shown in the embodiment of the present invention, the ternary precursor Ni of the radial-like spherical top pyramid structure 1 / 3 Co 1 / 3 Mn 1 / 3 (OH) 2 The cone part is radially growing elongated primary particles, and the top of the sphere is an orderly accumulation of massive primary particles, which form secondary agglomerates with regular morphology and uniform ...

Embodiment 2

[0073] The cone portion of the ternary precursor of the radial-like spherical-top pyramid structure is a long strip of primary particles that grow radially, and the top of the sphere is an orderly stacked block-shaped primary particle that forms a secondary agglomerate; the radial The chemical formula of the ternary precursor of the spherical top-cone structure is Ni 0.5 Co 0.2 Mn 0.3 (OH) 2 ; the average length of the elongated primary particles is 12 μm; the average particle size of the bulk primary particles of the surface layer is 3 μm, and the average stacking thickness is 4 μm.

[0074] like Figure 4 As shown in the embodiment of the present invention, the ternary precursor Ni of the radial-like spherical top pyramid structure 0.5 Co 0.2 Mn 0.3 (OH) 2 The cone part is radially growing elongated primary particles, and the top of the sphere is an orderly accumulation of massive primary particles, which form secondary agglomerates with regular morphology and uniform...

Embodiment 3

[0087] The cone portion of the ternary precursor of the radial-like spherical-top pyramid structure is a long strip of primary particles that grow radially, and the top of the sphere is an orderly stacked block-shaped primary particle that forms a secondary agglomerate; the radial The chemical formula of the ternary precursor of the spherical top-cone structure is Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 ; the average length of the elongated primary particles is 8 μm; the average particle diameter of the surface layer block-shaped primary particles is 1 μm, and the average stacking thickness is 3 μm.

[0088] After testing, the ternary precursor Ni of the radial spherical top pyramid structure in the embodiment of the present invention is 0.8 Co 0.1 Mn 0.1 (OH) 2 The cone part is radially growing elongated primary particles, and the top of the sphere is an orderly accumulation of massive primary particles, which form secondary agglomerates with regular morphology and uniform distribu...

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Abstract

A ternary precursor with a spherical pyramid-like structure, a positive electrode material, and a preparation method thereof, wherein the cone of the ternary precursor is long strip-shaped primary particles that grow radially, and the top of the sphere is an orderly stacked block-shaped primary particle , and form secondary aggregates; the chemical formula of the ternary precursor is Ni x co y mn (1‑x‑y) (OH) 2 , wherein, 0.3<x<0.9, 0.05<y<0.50, 0.05<1-x-y<0.50. The invention also discloses a preparation method of the ternary precursor with a radial spherical cone-like structure, an anode material and a preparation method. The ternary precursor and the positive electrode material of the present invention have regular morphology and uniform distribution, which is beneficial to the transportation of lithium ions during charge and discharge, and has stable discharge specific capacity, charge and discharge performance and Coulombic efficiency, and good cycle performance. The method of the invention has the advantages of simple process, low reaction temperature and low cost of raw materials, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a ternary precursor, a positive electrode material and a preparation method, in particular to a ternary precursor with a radial-like spherical top pyramid structure, a positive electrode material and a preparation method. Background technique [0002] Nickel-cobalt-manganese-based ternary material Li (Ni x Co y Mn 1-x-y )O 2 The high specific energy battery has become a research hotspot in the field of lithium-ion power battery. However, during the cycle of lithium-ion battery ternary cathode materials, a series of defects are often caused due to changes in various factors, thereby reducing the electrochemical performance of ternary cathode materials. To a certain extent, solve related problems and improve electrochemical performance. [0003] CN107959022A discloses a solvothermal method for preparing a ternary positive electrode material and a preparation method. The precursor is obtained by a hydrothermal method after fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525C01G53/00
CPCC01G53/006C01G53/50C01P2002/72C01P2004/03H01M4/505H01M4/525H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 郭学益童汇毛高强喻万景田庆华丁治英杨英焦雯
Owner CENT SOUTH UNIV
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