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Anode active material, preparation method of anode active material, high-performance anode slurry containing anode active material, and all-solid-state lithium ion battery

A positive electrode active material and positive electrode slurry technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems that limit the development of large-capacity batteries, and the electrochemical performance of all-solid-state lithium-ion batteries is difficult to meet the actual use requirements. To achieve the effect of high specific capacity

Active Publication Date: 2017-05-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a positive electrode active material, a preparation method thereof, a high-performance positive electrode slurry containing the positive electrode active material, a positive electrode sheet made of the positive electrode slurry, and an all-solid lithium Ion batteries, aiming to solve the problem that the electrochemical performance of the existing all-solid-state lithium-ion batteries is difficult to meet the needs of actual use, which limits its development in the field of large-capacity batteries

Method used

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  • Anode active material, preparation method of anode active material, high-performance anode slurry containing anode active material, and all-solid-state lithium ion battery
  • Anode active material, preparation method of anode active material, high-performance anode slurry containing anode active material, and all-solid-state lithium ion battery

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Embodiment 1

[0099] (1) A positive electrode active material, the positive electrode active material is a nickel-rich type core-shell structure particle coated with an inorganic compound coating on the surface (i.e. a nickel-rich type core-shell structure particle and an inorganic compound coating layer on its surface ), wherein the core of the nickel-rich type core-shell structure particle is nickel-cobalt lithium manganese oxide, and the molar ratio of the three elements Ni, Co, and Mn is 8:1:1, and the shell of the nickel-rich type core-shell structure particle is LiNi 0.8 co 0.15 Al 0.15 o 2 , the mass of nickel-cobalt-lithium manganese oxide in the inner core accounts for 60% of the total mass of nickel-rich core-shell structure particles, and the inorganic compound coating layer is 0.5nm thick Li 3 PO 4 cladding layer, Li 3 PO 4 The mass of the cladding layer accounts for 6% of the total mass of the nickel-rich type core-shell structure particles covered with the inorganic compo...

Embodiment 2

[0111] (1) A positive electrode active material, the positive electrode active material is a nickel-rich type core-shell structure particle coated with an inorganic compound coating on the surface (i.e. a nickel-rich type core-shell structure particle and an inorganic compound coating layer on its surface ), wherein the core of the nickel-rich type core-shell structure particle is nickel-cobalt lithium manganese oxide, and the molar ratio of Ni, Co, and Mn is 6:2:2, and the shell of the nickel-rich type core-shell structure particle is LiNi 0.8 co 0.15 Al 0.15 o 2 , the mass of nickel-cobalt lithium manganese oxide in the core accounts for 95% of the total mass of nickel-rich core-shell structure particles, and the inorganic compound coating layer is 20nm thick LiNiPO 4 Cladding layer, LiNiPO 4 The mass of the cladding layer accounts for 0.001% of the total mass of the nickel-rich core-shell structure particles coated with the inorganic compound cladding layer.

[0112] (2...

Embodiment 3

[0122] (1) A positive electrode active material, the positive electrode active material is a nickel-rich type core-shell structure particle coated with an inorganic compound coating on the surface (i.e. a nickel-rich type core-shell structure particle and an inorganic compound coating layer on its surface ), wherein the core of the nickel-rich type core-shell structure particle is nickel-cobalt lithium manganese oxide, and the molar ratio of the three elements Ni, Co, and Mn is 8:1:1, and the shell of the nickel-rich type core-shell structure particle is LiNi 0.8 co 0.15 Al 0.15 o 2 , the quality of nickel-cobalt lithium manganese oxide in the core accounts for 70% of the total mass of nickel-rich core-shell structure particles, and the inorganic compound coating is 5nm thick Li 2 O-ZrO 2 cladding layer, Li 2 O-ZrO 2 The mass of the coating layer accounts for 1% of the total mass of the nickel-rich type core-shell structure particles coated with the inorganic compound coa...

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Abstract

The invention relates to an anode active material, a preparation method of the anode active material, high-performance anode slurry containing the anode active material, and an all-solid-state lithium ion battery. The anode active material is a nickel-rich type core-shell structure particle or a nickel-rich type core-shell structure particle coated with an inorganic compound coating layer at the surface; an inner core of the nickel-rich type core-shell structure particle is LiNixCoyMn1-x-yO2; the shell is nickel cobalt lithium aluminate. The invention also provides the high-performance anode slurry, which comprises the anode active material, a composite conductive agent, a composite bonding agent, an additive and an organic solvent, wherein the additive is sulfide solid electrolyte; the anode slurry is used for preparing an anode plate consisting of an anode current collector, an anode slurry layer and a modification layer; the anode plate, the sulfide solid electrolyte and a cathode plate are assembled into the all-solid-state lithium ion battery. The all-solid-state lithium ion battery has the prominent advantages of high mass specific energy, high volumetric specific energy, good rate capability, good cycle performance, high safety and the like, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a positive electrode active material, a preparation method thereof, a high-performance positive electrode slurry containing the positive electrode active material, and an all-solid lithium ion battery, in particular to a positive electrode active material, a preparation method thereof, and a positive electrode active material comprising The high-performance positive electrode slurry of the positive electrode active material, the positive electrode sheet made of the positive electrode slurry, and the all-solid lithium ion battery. Background technique [0002] Lithium-ion batteries have high energy density, long service life (100% DOD charge and discharge can reach more than 900 times, when using 30% DOD shallow depth charge and discharge, the number of cycles can exceed 5000 times), large output power, and small self-discharge (less than 10% per month, less than half of Ni-Cd a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/62H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/505H01M4/525H01M4/622H01M10/0525Y02E60/10
Inventor 谭强强徐宇兴
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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