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Positive electrode active material, precursor thereof, method for producing same, and rechargeable lithium battery

A positive electrode active material and lithium battery technology, applied in the direction of active material electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve problems such as uneven coating, and achieve the effect of improving cycle life degradation and stability problems

Pending Publication Date: 2021-02-09
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, phosphate, etc. having a relatively large particle size may not be evenly coated on the grain boundaries of secondary oxide particles or between primary oxide particles through the aforementioned process, but mostly coated only on the secondary oxide particles. on the surface of the particles

Method used

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  • Positive electrode active material, precursor thereof, method for producing same, and rechargeable lithium battery
  • Positive electrode active material, precursor thereof, method for producing same, and rechargeable lithium battery
  • Positive electrode active material, precursor thereof, method for producing same, and rechargeable lithium battery

Examples

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Embodiment 1

[0159] Nickel sulfate (NiSO 4 ·6H 2 O), cobalt sulfate (CoSO 4 ·7H 2 O) and manganese sulfate (MnSO 4 ·H 2 O) was dissolved in distilled water to prepare a transition metal solution, and phosphoric acid (H 3 PO 4 ) was dissolved in distilled water as a phosphorus compound in an amount of 0.15 wt% phosphate in the final positive electrode active material to prepare an aqueous phosphoric acid solution. To form the complex, ammonia (NH 4 OH) as a chelating agent and sodium hydroxide (NaOH) as a precipitating agent.

[0160] Mixing a transition metal solution with an aqueous phosphoric acid solution to have 0.5 mol of a phosphorus-containing compound based on 100 mol of a nickel-based composite hydroxide precursor to prepare a mixed solution, and on the other hand, preparing a transition metal solution not including a phosphorus-containing compound .

[0161] Put ammonia with a concentration of 0.5mol / L (M) into the reactor, and then, at 50°C, use 3.0kW / m 3 The stirring ...

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Abstract

Embodiments provide a positive electrode active material, a precursor thereof, a method for preparing the same, and a rechargeable lithium battery. The positive electrode active material precursor fora rechargeable lithium battery includes a nickel-based composite precursor including secondary particles in which a plurality of primary particles are aggregated, where the nickel-based composite precursor has a central portion and a surface portion, and the central portion includes a phosphate.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2019-0096750 filed with the Korean Intellectual Property Office on August 8, 2019, the entire contents of which are incorporated herein by reference. technical field [0003] Disclosed are a positive active material precursor for a rechargeable lithium battery, a positive active material for a rechargeable lithium battery, a method for preparing the positive active material, and a rechargeable lithium battery including the positive active material. Background technique [0004] Rechargeable lithium battery technology has undergone significant development and has been utilized in various fields such as energy storage and electric vehicles and portable electronic devices. [0005] In general, for the positive electrode active material, one of the important constituent materials of rechargeable lithium batteries, lithium metal oxides such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/505H01M4/485H01M4/58H01M10/052C01B25/26C01B25/37C01B25/45
CPCH01M4/362H01M4/525H01M4/505H01M4/485H01M4/5825H01M10/052C01B25/26C01B25/45C01B25/375H01M2004/028H01M4/366H01M10/0525Y02E60/10H01M4/62C01G53/006C01G53/50C01P2004/80C01P2006/40H01M4/0416H01M2004/027
Inventor 金道猷
Owner SAMSUNG SDI CO LTD
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