▎ 摘　　要

We have proved that chemically prepared micro-crystalline PbSO4 can be directly used as the electrode active material of lead acid batteries. Therefore, we would like to know how it works in start-stop SLI batteries working under high-rate partial-state-of-charge (HRPSoC), where PbSO4 microcrystals are very easy to grow up, thus degenerate the batteries. To increase the interaction between the conductive additive and PbSO4, a sulfonated graphene has been prepared by reacting reduced graphene oxide (rGO) with 4-benzenediazoniumsulfonate using H3PO2 as the reducing agent, and its conductive property has been studied. Results show that the battery performance can be promoted significantly with 1.0 wt.% of PbSO4 added: the initial discharge capacity is 123.3 mA center dot g(-1) at a current density of 100 mA center dot g(-1) and it can survive 1000 cycles of 100% DOD, and 12,126 HRPSoC micro cycles of 60-second charge and discharge at 200 mA center dot g(-1) after it is discharged to 50% state of charge (SoC), while the one with 0.5% or 1.5% of sulfonated graphene can only last 3872 and 8122 cycles, respectively.