Core-double-shell structure composite nickel-cobalt-manganese ternary precursor material and preparation method and application thereof

A shell structure, nickel-cobalt-manganese technology, applied in the core-double-shell structure composite nickel-cobalt-manganese ternary precursor material and its preparation field, can solve the problems affecting the service life, cycle life deviation and high temperature cycle of power batteries for new energy vehicles Performance deviation and other issues, to achieve good cycle performance, high specific energy, and the effect of inhibiting irreversible phase transition

Active Publication Date: 2020-05-01
中冶瑞木新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lithium-rich manganese-based nickel-cobalt-manganese ternary cathode materials have the absolute advantage of high battery specific energy, lithium-rich manganese-based nickel-cobalt-manganese ternary cathode materials have a transition from layered structure to spinel structure during long-term cycling. The irreversible phase transition process and the dissolution of Mn elements into the electrolyte during the cycle lead to deviations in cycle life, especially in high-temperature cycle performance, which in turn affects the service life of power batteries for new energy vehicles

Method used

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  • Core-double-shell structure composite nickel-cobalt-manganese ternary precursor material and preparation method and application thereof
  • Core-double-shell structure composite nickel-cobalt-manganese ternary precursor material and preparation method and application thereof
  • Core-double-shell structure composite nickel-cobalt-manganese ternary precursor material and preparation method and application thereof

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Embodiment 1

[0071] The core-double-shell structure composite nickel-cobalt-manganese ternary precursor material includes a core, a subshell layer and an outermost layer, the subshell layer is coated on the outer surface of the core, and the outermost layer is coated on the outer surface of the subshell layer , where: the chemical formula of the core material is Ni 0.15 co 0.15 mn 0.70 CO 3 ; The chemical formula of the subshell material is Ni 0.80 co 0.10 mn 0.10 (OH) 2 ; The outer shell material is aluminum hydroxide. Among them, the particle size of the inner core is 5 μm, the thickness of the subshell layer is 3 μm, and the thickness of the outermost layer is 500 nm. The diameter of the micropores in the shell layer is 0.3 μm.

[0072] The method for preparing the core-double shell structure composite nickel-cobalt-manganese ternary precursor material is as follows:

[0073] (1) The core material is a lithium-rich manganese-based nickel-cobalt-manganese ternary cathode materia...

Embodiment 2

[0082] The core-double-shell structure composite nickel-cobalt-manganese ternary precursor material includes a core, a subshell layer and an outermost layer, the subshell layer is coated on the outer surface of the core, and the outermost layer is coated on the outer surface of the subshell layer , where: the chemical formula of the core material is Ni 0.15 co 0.15 mn 0.70 CO 3 ; The chemical formula of the subshell material is Ni 0.90 co 0.07 Al 0.03 (OH) 2 ; The shell material is zirconium hydroxide. Among them, the particle size of the inner core is 9 μm, the thickness of the subshell layer is 6 μm, and the thickness of the outermost layer is 1000 nm. The diameter of the micropores in the shell layer is 0.5 μm.

[0083] The method for preparing the core-double shell structure composite nickel-cobalt-manganese ternary precursor material is as follows:

[0084] (1) The core material is a lithium-rich manganese-based nickel-cobalt-manganese ternary cathode material pr...

Embodiment 3

[0093] The core-double-shell structure composite nickel-cobalt-manganese ternary precursor material includes a core, a subshell layer and an outermost layer, the subshell layer is coated on the outer surface of the core, and the outermost layer is coated on the outer surface of the subshell layer , where: the chemical formula of the core material is Ni 0.15 co 0.15 mn 0.70 CO 3 ; The chemical formula of the subshell material is Ni 0.50 co 0.20 mn 0.30 (OH) 2 ; The shell material is titanium hydroxide. Among them, the particle size of the inner core is 1 μm, the thickness of the subshell layer is 1 μm, and the thickness of the outermost layer is 5 nm. The diameter of the micropores in the shell layer is 0.1 μm.

[0094] The method for preparing the core-double shell structure composite nickel-cobalt-manganese ternary precursor material is as follows:

[0095] (1) The core material is a lithium-rich manganese-based nickel-cobalt-manganese ternary cathode material precur...

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Abstract

The invention discloses a core-double shell structure composite nickel-cobalt-manganese ternary precursor material and a preparation method and an application thereof. The core-double shell structurecomposite nickel-cobalt-manganese ternary precursor material comprises an inner core, a secondary shell layer and an outermost shell layer, wherein a chemical formula of the inner core material is Nix1Coy1Mn(1-x1-y1)CO3, x1 is greater than 0 and less than 1, y1 is greater than 0 and less than 1, and 1-x1-y1 is greater than 0 and less than 1, at least one part of an outer surface of the inner coreis coated with the secondary shell layer, a chemical formula of a material of the secondary shell layer is Nix2Coy2M(1-x2-y2)(OH)2, M is Mn and/or Al, x2 is larger than 0 and smaller than 1, y2 is larger than 0 and smaller than 1, and 1-x2-y2 is larger than 0 and smaller than 1, an outermost shell layer coats at least one part of an outer surface of the secondary shell layer and is made of metal hydroxide and/or metal oxide. The material is advantaged in that the single battery prepared from a positive electrode material prepared from the core-double shell structure composite nickel-cobalt-manganese ternary precursor material can realize long cycle life on the basis of high specific energy, so a vehicle loaded with the battery has excellent cruising ability, and use requirements of consumers are met.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a core-double shell structure composite nickel-cobalt-manganese ternary precursor material and a preparation method and application thereof. Background technique [0002] As far as new energy vehicles are concerned, regardless of the state's support policies, the key factor determining their development is still whether they can meet the needs of consumers. At present, limited by the technical level of power batteries, the cruising range of most commercial pure electric vehicles is still low, and consumers have serious "mileage anxiety" about them, and their desire to buy is not strong. The battery life of pure electric vehicles can reach 320 kilometers, which can meet the needs of most consumers; the battery life can reach 600 kilometers, which is close to the mileage of fuel vehicles with full fuel, so that consumers' "range anxiety" can be eliminated. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/052
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M4/62H01M4/628H01M10/052H01M2220/20Y02E60/10
Inventor 秦波朱红斌赵文博张迪邢天航孙利佳张加美
Owner 中冶瑞木新能源科技有限公司
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