A kind of lithium nickel manganese oxide positive electrode material and the preparation method of precursor
A technology of lithium nickel manganese oxide and its production method, which is applied in nanotechnology, chemical instruments and methods, and nickel compounds for materials and surface science, and can solve the problems of high cost of lithium nickel manganese oxide and high requirements for preparation and regulation
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Embodiment 1
[0029] A preparation method of lithium nickel manganese oxide precursor, comprising the following steps:
[0030] Step 1. Prepare a mixed solution of metal ions: mix lithium salt, nickel salt and manganese salt to form a mixed salt, dissolve the mixed salt in water, then add ethanol and stir to obtain a mixed solution of metal ions.
[0031] Among them, the lithium salt is LiCH 3 COO·2H 2 O, the nickel salt is Ni(CH 3 COO) 2 4H 2 0, manganese salt is Mn(CH 3 COO) 2 4H 2 0, and the mol ratio of Li in the lithium salt, Ni in the nickel salt and Mn in the manganese salt is n(Li):n(Ni):n(Mn)=1:0.5:0.5, the mass ratio of mixed salt and water is 1:1, the volume ratio of water and ethanol is 1:1, and the stirring time after adding ethanol is 0.5 hours;
[0032] Step 2, preparing the oxalic acid mixed solution: preparing the oxalic acid solution and adding ethanol to obtain the oxalic acid mixed solution.
[0033] Specifically, the H 2 C 2 o 4 2H 2 O was added to the same...
Embodiment 2
[0040] A preparation method of lithium nickel manganese oxide positive electrode material, comprising the following steps:
[0041] Step 1. Prepare a mixed solution of metal ions: mix lithium salt, nickel salt and manganese salt to form a mixed salt, dissolve the mixed salt in water, and then add ethanol and stir to obtain a mixed solution of metal ions.
[0042] Among them, the lithium salt is LiCH 3 COO·2H 2 O, the nickel salt is Ni(CH 3 COO) 2 4H 2 0, manganese salt is Mn(CH 3 COO) 2 4H 2 0, and the mol ratio of Li in the lithium salt, Ni in the nickel salt and Mn in the manganese salt is n(Li):n(Ni):n(Mn)=1:0.5:0.5, the mass ratio of mixed salt and water is 1:1, the volume ratio of water and ethanol is 1:1, and the stirring time after adding ethanol is 0.5 hours;
[0043] Step 2, preparing the oxalic acid mixed solution: preparing the oxalic acid solution and adding ethanol to obtain the oxalic acid mixed solution.
[0044] Specifically, the H 2 C 2 o 4 2H 2 O...
Embodiment 3
[0054] A preparation method of lithium nickel manganese oxide precursor, comprising the following steps:
[0055] Step 1. Prepare a mixed solution of metal ions: mix lithium salt, nickel salt and manganese salt to form a mixed salt, dissolve the mixed salt in water, and then add ethanol and stir to obtain a mixed solution of metal ions.
[0056] Among them, the lithium salt is LiCH 3 COO·2H 2 O, the nickel salt is Ni(CH 3 COO) 2 4H 2 0, manganese salt is Mn(CH 3 COO) 2 4H 2 0, and the mol ratio of Li in the lithium salt, Ni in the nickel salt and Mn in the manganese salt is n(Li):n(Ni):n(Mn)=1:0.5:0.5, the mass ratio of mixed salt and water is 1:2, the volume ratio of water and ethanol is 1:3, and the stirring time after adding ethanol is 0.5 hours;
[0057] Step 2, preparing the oxalic acid mixed solution: preparing the oxalic acid solution and adding ethanol to obtain the oxalic acid mixed solution.
[0058] Specifically H 2 C 2 o 4 2H 2 0 was added to the same ...
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