The biggest problem with traditional lead-acid batteries is the negative electrode sulfation effect that occurs after high current and long-term service, leading to material failure and a sudden decrease in capacity. The negative electrode active material of ordinary lead-acid batteries is lead (Pb), while in lead-carbon batteries, the negative electrode changes from pure Pb to a dual functional composite negative electrode composed of carbon material (C) with double layer capacitance characteristics and sponge lead (Pb) with battery characteristics, which is the lead carbon negative electrode. It is then matched and assembled with the PbO ₂ positive electrode to form a lead-carbon battery. Overall, the changes in lead carbon batteries mainly occur at the negative electrode, and there are not significant changes in electrode fluid, positive electrode, and other aspects. Lead carbon batteries effectively suppress the sulfation trend of the negative electrode by adding carbon, resulting in a significant increase in battery life.
At present, the core competitiveness of lead carbon batteries lies in their low cost and good lifespan. They will become a strong competitor to electrochemical batteries such as lithium batteries and flow batteries in the fields of large-scale energy storage, low-speed electric vehicles, and electric bicycles.
Lead carbon batteries have a greater competitive advantage in scenarios with ample space and high cost requirements, and their primary investment cost is relatively low. Lead carbon batteries have great potential in the application of new energy distribution and independent shared energy storage.
The new power system presents diverse demands for energy storage power, duration, response time, and other aspects. The trend is to integrate various energy storage technology routes, and energy storage technology is gradually showing a pattern of coordinated development of various types. Under different conditions such as complex and ever-changing application scenarios, capacity scale, spatial conditions, and cost sensitivity, there is currently no energy storage technology that can take all. At present, lead carbon batteries still have good competitiveness, and more attention can be paid to the practical application of lead carbon batteries in independent energy storage.
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