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Method for producing positive electrode material, positive electrode comprising positive electrode material, and all-solid-state battery

A cathode material, cathode technology, applied in the field of cathode material production

Pending Publication Date: 2022-04-22
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current positive electrode surface coating technology not only has the problem that the interface resistance between the positive electrode and the electrolyte accounts for more than 70% of the total resistance of the all-solid-state battery, but also has limitations: the current "positive electrode surface coating" cost (coating material price / coating process cost) accounts for about 20% to 40% of the current price of all-solid-state batteries

Method used

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  • Method for producing positive electrode material, positive electrode comprising positive electrode material, and all-solid-state battery
  • Method for producing positive electrode material, positive electrode comprising positive electrode material, and all-solid-state battery
  • Method for producing positive electrode material, positive electrode comprising positive electrode material, and all-solid-state battery

Examples

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Effect test

Embodiment 1

[0091] 40 parts by weight of niobic acid was added to 100 parts by weight of water containing hydrogen peroxide to form a solution, and the pH of the solution was adjusted to 10 by adding and mixing ammonia thereto. Next, the solution was neutralized by adding lithium hydroxide thereto. After the neutralization was completed, a coating solution containing lithium and niobium in a molar ratio of 1:1 was obtained.

[0092] The resulting coating solution was spray coated into a rotary fluidized bed spray coater (Powrex MP-01 ) containing lithium oxide based particles. At this time, at a temperature of 140°C and a 0.40m 3 While circulating the lithium oxide-based particles at an air flow rate of 1 / min, the coating solution was sprayed at a rate of 4 g / min to a thickness of 5 nm.

[0093] Afterwards, the coated cathode material was heat-treated at a temperature of 350 °C to crystallize the coating, and the cathode material including the coating was added to the solvent together w...

Embodiment 2

[0096] Proceed in the same manner as in Example 1, except that an additional 0.125 parts by weight of nonionic surfactant (polyoxyethylene distyrenated polyethylene) is added to 100 parts by weight of water of Example 1 together with niobic acid and ammonia Production of cathode materials and assembly of all-solid-state battery test units.

Embodiment 3

[0098] In addition to adding 0.125 parts by weight of nonionic surfactant (based on polyoxyethylene alkyl ether (polyoxyethylene alkyl ether)) to 100 parts by weight of water in Example 1 with niobic acid and ammonia, the same method as in Example 1 was added. The production of positive electrode materials and the assembly of all solid-state battery test units are carried out in the same way.

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Abstract

The invention relates to a method for producing a positive electrode material, a positive electrode comprising the positive electrode material, and an all-solid-state battery. More specifically, in consideration of the practical application of an all-solid-state battery, the present disclosure provides a production method for improving process efficiency while improving positive electrode performance in the production of a positive electrode for an all-solid-state battery.

Description

technical field [0001] The present disclosure relates to a method for producing a cathode material (cathode material) and a cathode including the cathode material thus produced. More specifically, the present disclosure provides a production method that improves process efficiency while improving performance of the positive electrode in the production of the positive electrode for the all-solid battery in consideration of the practical application of the all-solid-state battery. Background technique [0002] In order to be used, cathode materials for all-solid-state batteries undergo the following surface modification process: In Li(Ni / Co / Mn)O with a layered crystal structure 2 The surface of lithium oxide powder is uniformly coated with lithium ion conductors such as LiNbO 3 or Li 4 Ti 5 o 12 to a thickness of several nanometers. In particular, LiNbO 3 The surface coating exhibits the effect of effectively improving battery capacity and output performance by significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525H01M4/13
CPCH01M4/13H01M4/36H01M4/525H01M4/505H01M10/0525H01M2004/028H01M4/1391H01M4/366H01M10/0562Y02E60/10H01M4/62H01M4/131C01G33/00H01M2300/0065C01P2006/40C01P2004/80H01M4/628
Inventor 尹龙燮闵泓锡土屋元佐佐木勇树
Owner HYUNDAI MOTOR CO LTD