Lead-acid storage battery having added nano carbonaceous material and method for making same
A lead-acid battery, nano-carbon technology, applied in the direction of lead-acid batteries, lead-acid battery electrodes, battery electrodes, etc., can solve the problems of unable to form a three-dimensional conductive network, poor dispersion, limited effect, etc.
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Embodiment 1
[0015] Take 5 grams of pretreated one-dimensional nano-carbon material (50 nm in average diameter) graphitized at 2400° C., add 1 gram of dispersant and 100 grams of water, and boil for 2 hours. Then, the dispersion liquid was heated at 150° C. to make a paste. Put the modified paste into a ball mill and ball mill for 2 hours. Then, 200 grams of water was added for dilution, and after 20 minutes of high shear, a stable carbon nanotube dispersion was obtained. Take 9 milliliters of the above-mentioned dispersion liquid, mix it with 80 milliliters of electrolyte solution, add it to the 6N4 motorcycle battery, and carry out the rated capacity test. The charging and discharging system is 0.4A charging to 8.4V, 0.4A discharging to 5.75V, and three cycles. Its rated capacity was measured to be 4.2Ah, and the capacity of the storage battery without adding the dispersion liquid was 3.9Ah. Also, the initial charging time is significantly shortened. It shows that the active material...
Embodiment 2
[0017] Take 5 grams of pretreated one-dimensional nano-carbon material (50 nm in average diameter) graphitized at 2400° C., add 1 gram of dispersant and 100 grams of water, and boil for 2 hours. Then, the dispersion liquid was heated at 150° C. to make a paste. Put the modified paste into a ball mill and ball mill for 2 hours. Then, 200 grams of water was added for dilution, and after 20 minutes of high shear, a stable carbon nanotube dispersion was obtained. Take 9 milliliters of the above-mentioned dispersion liquid, mix it with 80 milliliters of electrolyte solution, add it to a 6N4 motorcycle battery, and conduct a charge-discharge cycle test. The charging and discharging system is as follows: 1A charging for 4 hours, 4A discharging to 3V. The result is as figure 1 as shown in a. It can be seen that adding one-dimensional nano-carbon material dispersion can improve the service life of lead-acid batteries.
Embodiment 3
[0021] Take 5 grams of pretreated one-dimensional nano-carbon material (average diameter 50nm) graphitized at 2400° C., add 2 grams of dispersant and 100 grams of water, and boil for 2 hours. Then, the dispersion liquid was heated at 150° C. to make a paste. Put the modified paste into a ball mill and ball mill for 2 hours. Then, 200 grams of water was added for dilution, and after 20 minutes of high shear, a stable carbon nanotube dispersion was obtained. Get 100 milliliters of above-mentioned dispersion liquids and join in the sulfated 6-QA-60 lead-acid storage battery, then carry out cycle charging and discharging for 1 month. The density of the electrolyte of the lead-acid battery is changed from the initial 1.20g / cm 3 , increased to 1.29g / cm 3 . The capacity was restored to 58Ah.
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