POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR, AND METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR

Provided are a method of preparing a bimodal positive electrode active material precursor and a positive electrode active material precursor prepared by the above-described method, the method comprising: a first step of preparing a first aqueous transition metal solution and a second aqueous transit...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, Hyeon Jin, PARK, Kyoung Wan, YANG, Song Yi, PARK, Young Su, YOON, Ju Han
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Provided are a method of preparing a bimodal positive electrode active material precursor and a positive electrode active material precursor prepared by the above-described method, the method comprising: a first step of preparing a first aqueous transition metal solution and a second aqueous transition metal solution; a second step of inputting a first reaction source material including the first aqueous transition metal solution, an ammonium-cation-containing complex-forming agent, and a basic aqueous solution into a reactor, performing a precipitation reaction at pH 12 or more to induce the nucleation of a first positive electrode active material precursor particle, and performing a precipitation reaction at less than pH 12 to induce the growth of the first positive electrode active material precursor particle; and a third step of inputting a second reaction source material including the second aqueous transition metal solution, an ammonium-cation-containing complex-forming agent, and a basic aqueous solution into the reactor containing the first positive electrode active material precursor particle, performing a precipitation reaction at pH 12 or more to induce the nucleation of a second positive electrode active material precursor particle, and performing a precipitation reaction at less than pH 12 to induce the simultaneous growth of the first positive electrode active material precursor particle and the second positive electrode active material precursor particle, thereby preparing a bimodal positive electrode active material precursor including the first positive electrode active material precursor particle and the second positive electrode active material precursor particle, which have mutually different average particle diameters (Dso), wherein at least one of the first aqueous transition metal solution and the second aqueous transition metal solution contains one or more doping elements selected from among Zr, B, W, Mo, Cr, Al, Ti, Mg, Ta, and Nb.