Lead sulfation severely shortens the cycling life of lead-acid battery under high-rate partial-state-of-charge (HRPSoC) operation. Adding carbon materials into negative active mass has been demonstrated as an effective strategy to suppress the sulfation. In this paper, rice-husk-based activated carbon (RHAC) with high specific surface area and high pore volume exhibits excellent performances on enhancing the discharge capacity, the dynamic charge acceptance and especially the cycling life of negative electrode of lead acid battery. Results show that the HRPSoC cycling life of negative electrode with RHAC exceeds 5000 cycles which is 4.65 and 1.42 times that of blank negative electrode and negative electrode with commercial activated carbon, respectively. These outstanding performances are ascribed to the unique architectural properties of RHAC comparing with commercial activated carbon, such as three-dimensional porous structure for acid storage, high mesopore volume for efficient ions transport and large external specific surface area for energetic Pb deposition.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research group acknowledges the financial support providedby the National Natural Science Foundation of
China(NO.21573093,21975101), Science and Technology Innovation Team Project of Jilin University(NO.2017TD31),Major Science and Technology Research Project of “ShuangshiProject”in ChangchunCity (NO. 17SS018).