Nickel-containing composite hydroxide and production process therefor, positive-electrode active material for a nonaqueous-electrolyte secondary battery and production process therefor, and nonaqueous-electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-2024186505-A1
Application number	US-202418401946-A
Country	US
Kind code	A1
Filing date	Jan 2, 2024
Priority date	Oct 30, 2014
Publication date	Jun 6, 2024
Grant date	—

Abstract

Provided is a nickel-containing composite hydroxide that is a precursor of a positive-electrode active material with which a nonaqueous-electrolyte secondary battery having a low irreversible capacity and a high energy density can be configured. An aqueous alkaline aqueous solution and a complexing agent are added to an mixed aqueous solution including at least nickel and cobalt to regulate the pH (measured at a reference liquid temperature of 25° C.) of this mixed aqueous solution to 11.0 to 13.0, the ammonium concentration to 4 to 15 g/L, and the reaction temperature to 20° C. to 45° C. Using stirring blades having an inclination angle of 20° to 60° with respect to a horizontal plane, the mixture is stirred to conduct a crystallization reaction under such conditions that when the nickel-containing composite hydroxide to be obtained is roasted in air at 800° C. for 2 hours, the roasted composite hydroxide has a BET value of 12 to 50 m 2 /g. Thus a nickel-containing composite hydroxide expressed by Ni 1−x−y Co x Al y M t (OH) 2+α (where, 0<x≤0.20, 0<y≤0.15, 0≤t≤0.10, 0≤α0.50, and M is one or more kind of element selected from among Mg, Ca, Ba, Nb, Mo, V, Ti, Zr and Y), or the general formula: Ni 1−k−z Co x Mn z M t (OH) 2+α (where 0<x≤0.50, 0<z≤0.50, x+z≤0.70, 0≤t≤0.10, 0≤α≤0.50, and M is one or more kind of element selected from among Mg, Ca, Ba, Nb, Mo, V, Ti, Zr and Y) is obtained.

First claim

What is claimed is:

1 . A production method for a nickel-containing composite hydroxide is a method for producing a nickel-containing composite hydroxide that is expressed by
the general formula: Ni 1−x−y Co x Al y M t (OH) 2+α , where 0<x≤0.20, 0<y≤0.15, 0≤t≤0.10, 0≤α≤0.50, and M is one or more kind of element selected from among Mg, Ca, Ba, Nb, Mo, V, Ti, Zr and Y, or the general formula: Ni 1−x−z Co x Mn z M t (OH) 2+α , where 0<x≤0.50, 0<z≤0.50, x+z≤0.70, 0≤t≤0.10, 0≤α≤0.50, and M is one or more kind of element selected from among Mg, Ca, Ba, Nb, Mo, V, Ti, Zr and Y, by a crystallization reaction; and the crystallization reaction comprises: adding an alkaline aqueous solution to a mixed aqueous solution that includes at least nickel and cobalt to make the pH value of that mixed aqueous solution that is measured at a reference liquid temperature of 25° C. 11.0 to 13.0; making the reaction temperature of the mixed aqueous solution 20° C. to 45° C.; adding a complexing agent to the mixed aqueous solution to make the ammonium ion concentration of that mixed aqueous solution 4 g/L to 15 g/L; and using stirring blades that have an inclination angle with respect to a horizontal plane of no less than 200 and no greater than 60°, stirring the mixed solution to obtain a nickel-containing composite oxide, wherein the stirring conditions are regulated so that, when the obtained nickel-containing composite hydroxide is roasted in air for 2 hours at 800° C. and is converted to a nickel-containing composite oxide, the BET value of the nickel-containing composite oxide becomes 12 m 2 /g to 50 m 2 /g.

2 . The production method for nickel-containing composite hydroxide according to claim 1 , further comprising a process of covering the nickel-containing composite hydroxide that is obtained by the crystallization reaction with Al or Mn, or with Al or Mn and added elements M.

Assignees

• Sumitomo Metal Mining Co

Inventors

• Ryoshi Kazuomi
• Mori Kensaku
• Kase Katsuya
• Kamata Yasutaka

Classifications

• C01G53/82 Primary

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• H01M4/525 Primary

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• C01G53/006

  Chemistry & Metallurgy · mapped topic

• C01G53/42

  containing alkali metals, e.g. LiNiO2 · CPC title

• C01G53/50

  of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title