Preparation method of high-density lithium battery anode material spinel lithium manganate
A type of lithium manganate and cathode material technology, applied in the field of lithium battery cathode materials, can solve the problems of high tap density, difficult, and easily damaged current collectors, and achieve the effect of improving overall performance, power characteristics, and electrode density.
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Embodiment 1
[0013] 1. First, prepare MnOOH by chemical method: add the aqueous solution containing manganese ions dropwise to the alkaline solution under strong stirring; during this process, a precipitation reaction occurs, and the precipitated product MnOOH; subsequently, the precipitated product MnOOH is separated, washed, and dried; 2. Mix the prepared MnOOH with lithium salt, and then calcine at a high temperature to prepare spherical or quasi-spherical spinel lithium manganate particles. The obtained product has a particle size of 5 um and a tap density of 2.3 g / cm 3 . The prepared LiMn 2 o 4 The particles, conductive agent and binder are mixed according to the mass ratio of 85:5:10, and then the conventional thickness is controlled and coated on the aluminum foil current collector. With 1.0 mol / L LiPF 6 / EC+DEC+DMC (volume ratio 1:1:1) is the electrolyte, the Li sheet is the negative electrode, and the Cellgard-2400 polypropylene film made in the United States is the diaphragm,...
Embodiment 2
[0019] 1. First, prepare MnOOH by chemical method: add the aqueous solution containing manganese ions dropwise to the alkaline solution under strong stirring; during this process, a precipitation reaction occurs, and the precipitated product MnOOH; subsequently, the precipitated product MnOOH is separated, washed, and dried; 2. Mix the prepared MnOOH with lithium salt, and then calcine at a high temperature to prepare spherical or spherical Li 1.05 mn 1.95 o 4particles. The particle size of the obtained product is 5-10um, and the tap density is 2.3g / cm 3 . Li will be prepared 1.05 mn 1.95 o 4 The particles, conductive agent and binder are mixed according to the mass ratio of 85:5:10, and then the conventional thickness is controlled and coated on the aluminum foil current collector. With 1.0 mol / L LiPF 6 / EC+DEC+DMC (volume ratio 1:1:1) is the electrolyte, the Li sheet is the negative electrode, and the Cellgard-2400 polypropylene film made in the United States is the ...
Embodiment 3
[0021] 1. First, prepare MnOOH by chemical method: add the aqueous solution containing manganese ions dropwise to the alkaline solution under strong stirring; during this process, a precipitation reaction occurs, and the precipitated product MnOOH; subsequently, the precipitated product MnOOH is separated, washed, and dried; 2. Mix the prepared MnOOH with lithium salt and MgO, and then calcine at a high temperature to prepare spherical or spherical LiMg 0.05 mn 1.95 o 4 particles. The particle size of the obtained product is 5-10 um, and the tap density is 2.4g / cm 3 . The prepared LiMg 0.05 mn 1.95 o 4 , Conductive agent and binder are mixed according to the mass ratio of 85:5:10, and then the conventional thickness is controlled and coated on the aluminum foil current collector. With 1.0 mol / L LiPF 6 / EC+DEC+DMC (volume ratio 1:1:1) is the electrolyte, the Li sheet is the negative electrode, and the Cellgard-2400 polypropylene film made in the United States is the di...
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