Lithium-ion film cell negative pole and preparing method
A thin-film battery and lithium-ion technology, applied in the direction of electrode manufacturing, battery electrodes, active material electrodes, etc., to achieve the effects of facilitating penetration, enhancing connection force, and reducing production costs
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[0020] Example 1:
[0021] First assemble the electrostatic spray deposition device used in the present invention: put one end of the 0.8 mm inner diameter silicone tube into a 250 ml conical flask containing the precursor solution, and connect the other end with a needle hole inner diameter 0.4 mm injection needle, and then fix the silicone tube In the groove of the flow tube of the peristaltic pump, the positive wire clip of the DC high voltage generator with a control flow range of 0-50 ml / hour and a voltage range of 0-40000V is connected to the injection needle and the needle point is kept upright, directly above the needle point 1 A thermocouple is placed horizontally at -4 cm, with a temperature control range of 0-800℃, and the negative pole of the DC high voltage generator is connected to the thermocouple.
[0022] Then prepare the precursor solution: then prepare the precursor solution: respectively take 0.0255 grams of LiOAC·2H 2 O and 0.6227 grams of Co (OAC) 2 .·4H 2 O ...
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[0028] Example 2:
[0029] Take 0.0255 grams of LiOAC·2H respectively 2 O and 0.6227 grams of Co (OAC) 2 ·4H 2 O (that is, the molar ratio of Li:Co is 1:1), stir and fully dissolve in 50 mL of carbitol, use the same operation steps as in Example 1, use copper foil as the substrate, heat the substrate to a temperature of 245 ℃ and The electrode film was obtained after heat preservation and deposition at this temperature for 2 hours, and the performance of the battery was tested after being assembled into a battery.
[0030] figure 2 The X-ray diffraction spectrum of the compound obtained in this example is incident on the copper target. In the figure, there are three sharp diffraction peaks at 44°, 52° and 75°, which are the diffraction peaks of the substrate, at 36°, 42.5°, There are four broad diffraction peaks near 61.5° and 74°, which are the (111), (200), (220) and (311) planes of CoO respectively. The relative intensity ratio of the peaks at 2θ of 42.5° and 36° is 1:1.53; K...
Example Embodiment
[0034] Example 3:
[0035] Respectively take LiOAC·2H 2 O and Co (OAC) 2 ·4H 2 O: Prepare five solutions with Li:Co ratios of 0.25:1, 0.5:1, 1:1, 2:1, and 4:1. The Co concentration in each solution is 0.005 mol / L, and the solvent is 50 ml of calorie ratio. alcohol. Using the same steps as in Example 1, still selecting foamed nickel as the substrate, keeping the substrate at a constant temperature of 225°C, and depositing them for 2 hours respectively, to obtain five chemical compositions of XLi. 2 O·YCoO(X=0.125, Y=1), XLi 2 O·YCoO(X=0.25, Y=1), XLi 2 O·YCoO(X=0.5, Y=1), XLi 2 O·YCoO (X=1, Y=1) and XLi 2 O·YCoO (X=2, Y=1) electrode film, and test its performance after assembling the obtained electrode film into a battery.
[0036] Figure 7 The capacity of the electrode film prepared in this example is at a voltage range of 3.00-0.01 volts and a discharge rate of 1C. When Li:Co is 0.25:1, 0.5:1, 1:1, 2:1 and 4:1, the discharge capacity of the electrode film is 480mAh / g, 550mAh / g, ...
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