The application of spray drying method in valve-regulated lead-acid battery

Spray drying method has been successfully applied to the field of lead-acid batteries. Lead powder/carbon black composite can be obtained by spray drying and subsequent calcination process. Glucose is added to increase the adhesion of carbon black and lead powder. The morphology changes before and after calcination are examined by FE-SEM. The composite negative material can enable the sum of discharge capacity increased by 8.27% from 4374.855 Ah to 4736.706 Ah at a discharge current of 25 A after 66 cycles. And the charge acceptance of the test cell also can be obviously enhanced.

► Spray drying method has been applied to the field of lead-acid batteries.
► Lead powder/carbon black composite was obtained by spray drying and subsequent calcination process.
► The sum of discharge capacity was increased by 8.27%.
► The charge acceptance of the test cell also can be obviously enhanced.