Abstract
Hierarchical porous carbon with in-situ grown carbon nanotube clusters(HPC-CNTs) was synthesized by transition metal catalytic cracking and used as an additive to inhibit irreversible sulfation of negative electrode of lead-acid batteries. The synthesis method not only makes a stable connection point between HPC and CNTs, but also avoids the agglomeration of CNTs. The HPC-CNTs has rich pore structure, and the specific surface area and specific capacitance are as high as 1307 m2 g−1and 164.03F g−1 respectively. The specific capacity of the negative active material(NAM) with the addition of this material is up to 175.71 mAhg−1, which is 22.57% higher than that of the commercial NAM(143.36 mAhg−1). The cycle life of the battery under high-rate partial-state-of-charge(HRPSoC) exceeds that of commercial batteries by 154%, reaching 42,946 cycles. Finally, the action mechanism of the material in the negative electrode of lead acid battery is analyzed, which provides a new material for prolonging the life of lead-acid batteries.
Published Version
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