Positive electrode material preparation used for lithium ion batteries and modification method thereof
A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of low discharge capacity, achieve the effects of reducing manganese dissolution, increasing capacity, and stabilizing the lattice structure
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[0026] Example 1
[0027] Fe-doped nickel manganate material LiNi 0.5-x Mm 1.5-x Fe 2x 0 4 Preparation of (x=0.05)
[0028] 1. Put 0.268g LiCH 3 COO 2H 2 O, 0.280g Ni(CHsCOO) 2H 2 O, 0.888g Mn (CH 3 COO)·4H 2 O, 0.0615g Fe(CH 3 COO)2 ·4H 2 O was dissolved in 20 mL of deionized water, and 80 mL of ethanol was added for stirring to obtain a metal salt solution.
[0029] 2. Put 0.780g of H 2 C 2 O 4 Dissolve in 30 mL of deionized water to form an oxalic acid solution.
[0030] 3. The metal salt solution was quickly poured into the oxalic acid solution and stirred for 5 hours, and then evaporated at 80°C for 10 hours to obtain the oxalate precursor precipitation.
[0031] 4. Heat up at a rate of 5C / min, pre-sinter the oxalate precursor in the air at 450°C for 8h, and then calcinate at 800°C for 15h at the same heating rate to obtain the target product LiNi 0.45 Mn 1.45 Fe 0.1 O 4 .
[0032] The prepared Fe-doped lithium nickel manganate material LiNi 0.5-x Mm ...
Example Embodiment
[0033] Example 2
[0034] Co-doped Keng-rich layered lithium-ion battery cathode material Li 1.2 Ni 0.19 Co 0.01 Mn 0.6 O 2 preparation
[0035] 1. Put 0.402g LiCH 3 COO 2H 2 O, 0.149g Ni(CHsCOO) 2 ·2H 2 O, 0.460g Mn(CHsCOO) 2 ·4H 2 O, 0.050g Co(CH 3 COO) 2 ·4H 2 O was dissolved in 20 mL of deionized water, and then 80 mL of ethanol was added for stirring to obtain a metal salt solution.
[0036] 2. Put 0.570g of H 2 C 2 O 4 Dissolve in 10 mL of deionized water and 40 mL of ethanol to form an oxalic acid solution.
[0037] 3. The metal salt solution was quickly poured into the oxalic acid solution and stirred for 5 hours, and then evaporated at 80°C for 10 hours to obtain the oxalate precursor precipitation.
[0038] 4. Heat up at a rate of 5°C / min. Precipitate the oxalate precursor in the air at 450°C for 8h, and then heat up to 850°C for 20h at the same heating rate to obtain the target product Li. 1.2 Ni 0.19 Co 0.01 Mn 0.6 O 2 .
[0039] The as-prep...
Example Embodiment
[0040] Example 3
[0041] Cr, Co co-doped nickel manganate material LiNi 0.45 Mn 1.45 Co 0.06 Cr 0.05 O 4 preparation
[0042] 1. Add 0.268g LiCH 3 COO 2H 2 O, 0.280gNi (CH 3 COO) 2 ·2H 2 O, 0.888g Mn (CH 3 COO) 2 ·4H 2 O, 0.031g Co(CH 3 COO) z ·4H 2 O, 0.029g Cr (CCH 3 COO) 2 Dissolve in 20 mL of deionized water, and then add 80 mL of ethanol for stirring to obtain a metal salt solution.
[0043] 2. Put 0.78g of H 2 C 2 O 4 Dissolve in 40mL deionized water to obtain oxalic acid solution.
[0044] 3. The metal salt solution was quickly poured into the oxalic acid solution and stirred for 5 hours, and then evaporated at 80°C for 10 hours to obtain the oxalate precursor precipitation.
[0045] 4. Heat up at a rate of 5°C / min, pre-calcinate the oxalate precursor in air at 450°C for 8h, and then calcinate at 850°C for 20h at the same heating rate to obtain the target product LiNi 0.45 Mn 1.45 Co 0.06 Cr 0.05 O 4 .
[0046] The prepared Co, Cr co-doped n...
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