Electrolyte additive for hydrogen evolution suppression of lead-acid storage battery and preparation method for electrolyte additive
An electrolyte additive, lead-acid battery technology, applied in lead-acid batteries and other directions, can solve the problem of poor cycle life improvement, and achieve the effect of improving hydrogen evolution overpotential
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[0025] Example 1
[0026] A method for preparing an electrolyte additive for inhibiting hydrogen evolution in lead-acid batteries. Pure water is added to concentrated sulfuric acid to adjust the density to 1.03g / cm 3 , Prepare dilute sulfuric acid, take 1L dilute sulfuric acid and heat to 40°C, add polyaspartic acid, sodium sulfate, disodium ethylenediaminetetraacetic acid, and then add succinic acid while stirring, and ultrasonically shake for 40min, and cool to room temperature.
[0027] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 1500mg / L, sodium sulfate 1000mg / L, succinic acid 1500mg / L, disodium edetate 3000mg / L, the rest is sulfuric acid solution; ultrasonic The frequency is 45 Hz.
Example Embodiment
[0028] Example 2
[0029] A method for preparing an electrolyte additive for inhibiting hydrogen evolution in lead-acid batteries. Pure water is added to concentrated sulfuric acid to adjust the density to 1.26g / cm 3 , Prepared into dilute sulfuric acid, heat 1L dilute sulfuric acid to 42°C, add polyaspartic acid, sodium sulfate, disodium edetate, and then add succinic acid while stirring, and vibrate ultrasonically for 45 minutes, and cool to room temperature.
[0030] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 1800mg / L, sodium sulfate 1100mg / L, succinic acid 1800mg / L, disodium ethylenediaminetetraacetate 4000mg / L, the rest is sulfuric acid solution; ultrasonic The frequency is 50 Hz.
Example Embodiment
[0031] Example 3
[0032] A method for preparing an electrolyte additive for inhibiting hydrogen evolution in lead-acid batteries. Pure water is added to concentrated sulfuric acid to adjust the density to 1.3g / cm 3 , Prepare dilute sulfuric acid, take 1L dilute sulfuric acid and heat to 45°C, add polyaspartic acid, potassium sulfate, disodium ethylenediaminetetraacetic acid, and then add succinic acid while stirring, and ultrasonically shake for 50min, and cool to room temperature.
[0033] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 2000mg / L, potassium sulfate 1200mg / L, succinic acid 2000mg / L, disodium ethylenediaminetetraacetate 6000mg / L, the rest is sulfuric acid solution; ultrasonic The frequency is 55 Hz.
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