Preparation method of novel ternary positive electrode material, positive electrode material, lithium battery prepared from positive electrode material and application of lithium battery

A cathode material, lithium battery technology, applied in the direction of lithium storage battery, positive electrode, secondary battery, etc., can solve the problems of complex process, unsuitable for industrial production, high cost, etc., to prevent dissolution, improve electronic conductivity and lithium ion Ion transport ability, sufficient contact effect

Pending Publication Date: 2022-03-15
WANHUA CHEM (SICHUAN) CO LTD +1
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Problems solved by technology

However, the process is relatively complicated and the cost is relatively expensive, which is not suitable for industrial production

Method used

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  • Preparation method of novel ternary positive electrode material, positive electrode material, lithium battery prepared from positive electrode material and application of lithium battery
  • Preparation method of novel ternary positive electrode material, positive electrode material, lithium battery prepared from positive electrode material and application of lithium battery
  • Preparation method of novel ternary positive electrode material, positive electrode material, lithium battery prepared from positive electrode material and application of lithium battery

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preparation example Construction

[0029] A preparation method of a novel ternary cathode material, comprising the following steps:

[0030] Step a) mixing nickel-cobalt-manganese precursor, lithium source, and dopant M oxide, and sintering at 500-1000°C to obtain the positive electrode material;

[0031] Step b) Combine the positive electrode material with oxidized carbon black, N,N-dimethylamide (DMF) and high melting point metal carbonyl compound N(CO) t Mix to obtain a suspension, and ultrasonically homogenize it; then heat and stir in an oil bath, then filter and dry to obtain a doped carbon-coated ternary cathode material;

[0032] Wherein, the median particle size D50 of the nickel-cobalt-manganese precursor in step a) is 4-8 μm, for example including but not limited to 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, so The nickel-cobalt-manganese precursor is, for example, Ni a co b mn c (OH) 2 , where, 0.6≤a≤0.9, 0.05≤b≤0.2, 0.05≤c≤0.3. The nickel-cobalt-manganese precursor may be a...

Embodiment 1

[0049] S1: Use Ni with a particle size D50 of 8 μm 0.83 co 0.12 mn 0.05 (OH) 2 Precursor and LiOH·H 2 O and 1500ppm additive ZrO 2 Mixed, and heated to 800°C with oxygen in the muffle furnace, sintered at constant temperature for 10h, and then cooled to room temperature to obtain LiNi 0.83 co 0.12 mn 0.05 Zr 0.01 o 2 .

[0050] S2: 30g of LiNi 0.83 co 0.12 mn 0.05 Zr 0.01 o 2 , 1.07g of W(CO) 6 And 1.2g oxidized carbon black is dissolved in the DMF of 28.8g (30.48mL), wherein anode material and total solution mass ratio 50wt%, oxidized carbon black and total solution mass ratio 2wt%, W (CO) 6 The concentration is 0.1mol / L. Ultrasonic treatment was performed for 1 hour at an ultrasonic frequency of 200 Hz to obtain a mixed liquid.

[0051] S3: Transfer the mixed liquid to a pressure-resistant bottle, heat to 200° C. in an oil bath, and stir magnetically for 10 h. Cool to room temperature; then filter and wash the solution, dry it in a vacuum oven at 100°C for...

Embodiment 2

[0053] S1: Use Ni with a particle size D50 of 5 μm 0.6 co 0.1 mn 0.3 (OH) 2 Precursor and LiOH·H 2 O and 1200ppm additive Al 2 o 3 Mixed, heated to 880°C by feeding oxygen into the muffle furnace, sintered at constant temperature for 10h, and then cooled to room temperature to obtain LiNi 0.6 co 0.1 mn 0.3 Al 0.01 o 2 .

[0054] S2: 30g of LiNi 0.6 co 0.1 mn 0.3 Al 0.01 o 2 , 1.61g of W(CO) 6 And 1.2g oxidized carbon black is dissolved in the DMF of 28.8g (30.48mL), wherein anode material and total solution mass ratio 50wt%, oxidized carbon black and total solution mass ratio 2wt%, W (CO) 6 The concentration is 0.15mol / L. Ultrasonic treatment was performed for 3 hours at an ultrasonic frequency of 300 Hz to obtain a mixed liquid.

[0055] S3: Transfer the mixed liquid to a pressure-resistant bottle, heat to 180° C. in an oil bath, and stir magnetically for 10 h. Cool to room temperature. After the solution was filtered and cleaned, it was dried in a vacuum...

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Abstract

The invention discloses a preparation method of a novel ternary positive electrode material, a positive electrode material, a lithium battery prepared from the positive electrode material and application of the positive electrode material, and the preparation method comprises the following steps: 1) mixing a nickel-cobalt-manganese precursor, a lithium source and a doping additive M, and sintering to obtain the positive electrode material; and 2) mixing the positive electrode material with oxidized carbon black and a high-melting-point metal carbonyl compound N (CO) t, respectively dissolving the mixture in N, N-dimethylformamide to obtain turbid liquid, mixing the turbid liquid after uniform ultrasonic treatment, then heating and stirring the turbid liquid in an oil bath pan, and then filtering and drying the turbid liquid to obtain the nanoscale carbide coated ternary positive electrode material. According to the nanoscale carbide-coated ternary positive electrode material disclosed by the invention, the wetting angle between a positive electrode plate and an electrolyte can be reduced under the capillary action of the nanoscale carbide, so that the positive electrode plate is more fully contacted with the electrolyte, and the electronic conductivity and the lithium ion transmission capability of the electrode plate are improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, in particular, relates to a preparation method of a novel ternary positive electrode material, the positive electrode material and the lithium battery made therefrom and applications thereof. Background technique [0002] Climate change, energy and environmental issues are long-term problems faced by human society. The solutions to the three major issues of greenhouse gas emissions, energy consumption and exhaust emissions in the field of transportation directly affect whether the common problems of mankind can be effectively solved. At present, the governments, organizations, automakers and their upstream and downstream of major countries around the world are acting together to accelerate the upgrading of the industrialization structure of the global auto industry and the strategic transformation of the electrification of the power system. Lithium-ion batteries are the cor...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/052H01M10/0525C01G53/00C01B32/15
CPCH01M4/366H01M4/505H01M4/525H01M4/628H01M4/625H01M10/052H01M10/0525C01G53/44C01B32/15H01M2004/021H01M2004/028C01P2004/03C01P2006/40Y02E60/10
Inventor 涂文哲邵洪源戴足典
Owner WANHUA CHEM (SICHUAN) CO LTD
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