Method for producing lithium metal composite oxide
A method for producing a lithium metal composite oxide, in which, in a calcining step of calcining a substance to be calcined using calcining means, the substance to be calcined is a mixture of a metal composite compound and a lithium compound or a mixture raw material containing a reactant of the metal composite compound and the lithium compound, a content rate of Li in the substance to be calcined is more than 5 mass % and 10 mass % or less, the calcining means includes an inner wall, a main material of the inner wall is an alloy, the alloy contains Ni and Al, a content rate of the Ni with respect to a total amount of the alloy is 93 mass % or more and 95 mass % or less, and a content rate of the Al with respect to the total amount of the alloy is 3 mass % or more and 5 mass % or less.
1 . A method for producing a lithium metal composite oxide,
wherein, in a calcining step of calcining a substance to be calcined using calcining means, the substance to be calcined is a mixture of a metal composite compound and a lithium compound or a mixture raw material containing a reactant of the metal composite compound and the lithium compound, a content rate of Li in the substance to be calcined is more than 5 mass % and 10 mass % or less,
the calcining means includes an inner wall, a main material of the inner wall is an alloy, and the alloy is one of the following:
(1) an alloy consisting of Ni and Al,
(2) an alloy consisting of Ni, Al, and Si,
(3) an alloy consisting of Ni, Al, and Mn, or
(4) an alloy consisting of Ni, Al, Si, and Mn,
a content rate of the Ni with respect to a total amount of the alloy is 93 mass % or more and 95 mass % or less, and a content rate of the Al with respect to the total amount of the alloy is 3 mass % or more and 5 mass % or less.
2 . The production method according to claim 1 ,
wherein the lithium metal composite oxide is represented by a general formula (I),
Li[Li x (Ni (1-y-z) Co y M z ) 1-x ]O 2 (I).
3 . The production method according to claim 1 ,
wherein the alloy is one of the following:
(2) the alloy consisting of Ni, Al, and Si,
(3) the alloy consisting of Ni, Al, and Mn, or
(4) the alloy consisting of Ni, Al, Si, and Mn.
4 . The production method according to claim 3 ,
wherein the alloy is one of the following:
(2) the alloy consisting of Ni, Al, and Si, or
(4) the alloy consisting of Ni, Al, Si, and Mn, and
wherein a content rate of the Si with respect to the total amount of the alloy is 0.5 mass % or more and 2.5 mass % or less.
5 . The production method according to claim 3 ,
wherein the alloy is one of the following:
(3) the alloy consisting of Ni, Al, and Mn, or
(4) the alloy consisting of Ni, Al, Si, and Mn, and
wherein a content rate of the Mn with respect to the total amount of the alloy is more than 0 mass % and 1.0 mass % or less.
6 . The production method according to claim 1 ,
wherein a calcining temperature in the calcining step is 100° C. or higher and 900° C. or lower.
7 . The production method according to claim 1 ,
wherein the calcining means is a rotary kiln.
8 . The production method according to claim 1 ,
wherein the calcining step includes a preliminary calcining step and a main calcining step, at least in the preliminary calcining step, calcining is performed using the calcining means, a calcining temperature in the preliminary calcining step is 100° C. or higher and 700° C. or lower, and a calcining temperature in the main calcining step is higher than 700° C. and 1000° C. or lower.
9 . The production method according to claim 2 ,
wherein the alloy is one of the following:
(2) the alloy consisting of Ni, Al, and Si,
(3) the alloy consisting of Ni, Al, and Mn, or
(4) the alloy consisting of Ni, Al, Si, and Mn.
10 . The production method according to claim 9 ,
wherein the alloy is one of the following:
(2) the alloy consisting of Ni, Al, and Si, or
(4) the alloy consisting of Ni, Al, Si, and Mn, and
wherein a content rate of the Si with respect to the total amount of the alloy is 0.5 mass % or more and 2.5 mass % or less.
11 . The production method according to claim 9 ,
wherein the alloy is one of the following:
(3) the alloy consisting of Ni, Al, and Mn, or
(4) the alloy consisting of Ni, Al, Si, and Mn, and
wherein a content rate of the Mn with respect to the total amount of the alloy is more than 0 mass % and 1.0 mass % or less.
12 . The production method according to claim 2 ,
wherein a calcining temperature in the calcining step is 100° C. or higher and 900° C. or lower.
13 . The production method according to claim 2 ,
wherein the calcining means is a rotary kiln.
14 . The production method according to claim 2 ,
wherein the calcining step includes a preliminary calcining step and a main calcining step, at least in the preliminary calcining step, calcining is performed using the calcining means, a calcining temperature in the preliminary calcining step is 100° C. or higher and 700° C. or lower, and a calcining temperature in the main calcining step is higher than 700° C. and 1000° C. or lower.