Manufacture of anode materials of lithium ion batteries
A technology for lithium-ion batteries and cathode materials, which is applied in the field of preparation of cathode materials for lithium-ion batteries, can solve the problems of inconvenient industrial production by combustion methods, and achieve the effects of superior performance, convenient operation, and low production costs
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Embodiment 1
[0022] Weigh 1.3mol of lithium nitrate, 0.1mol of chromium nitrate, and 0.6mol of manganese nitrate hexahydrate, add 350mL of ethanol to mix them evenly, and obtain a dry precursor at a constant temperature of 80°C for 24 hours; Carry out pre-decomposition, and grind after cooling; the pre-decomposition product is roasted at 700°C for 24 hours, cooled to room temperature, taken out and ground, and passed through a 300-mesh sieve to obtain a layered Li(Cr 0.1 Li 0.3 mn 0.6 )O 2 Material.
[0023] Fully mix the prepared positive active material, acetylene black and polytetrafluoroethylene (PTFE) binder according to a certain mass ratio (85:10:5), dry in a container at 80-100°C for 24 hours to eliminate moisture , coated on the stainless steel net, and press it into a positive electrode film with uniform thickness under the pressure of 20kPa with a hydraulic press. The metal lithium sheet is used as the negative electrode, and the electrolyte is 1mol / L LiPF 6 EC: DMC: EMC / 1:...
Embodiment 2
[0025] Weigh 1.3 mol of lithium nitrate, 0.1 mol of chromium nitrate, 0.6 mol of manganese nitrate hexahydrate, add 1 mol of 2-ethylhexanoic acid to make it evenly mixed, and obtain a dry precursor at a constant temperature of 80 °C for 24 hours; Pre-decompose the obtained precursor, grind it after cooling; roast the pre-decomposed product at 800°C for 18 hours in an air atmosphere, cool it to room temperature in an argon atmosphere, take it out and grind it, and pass through a 300-mesh sieve to obtain a layer Like Li(Cr 0.1 Li 0.3 mn 0.6 )O 2 The material is subjected to a cyclic voltammetry test in a voltage range of 2.5-5.0V at a scanning speed of 0.1mV / s, and the cyclic voltammetry diagram is shown in figure 2 .
Embodiment 3
[0027]Weigh 1.2mol lithium nitrate, 0.1mol lithium fluoride, 0.1mol chromium trioxide, and 0.6mol manganese dioxide respectively, add 24g graphite to mix them evenly, and obtain a dry precursor at a constant temperature of 80°C for 24h; in an air atmosphere The obtained precursor is pre-decomposed at 400°C, cooled and then ground; the pre-decomposed product is calcined at 880°C for 16 hours, cooled to room temperature in a nitrogen atmosphere, taken out and ground, and passed through a 300-mesh sieve to obtain a layered Li(Cr 0.1 Li 0.3 mn 0.6 )O 2 material, its scanning electron microscope image is shown in image 3 .
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