The significant advantages of sodium persulfate in the treatment of used batteries

In today's society, with the rapid advancement of technology, batteries are being used more widely than ever—from everyday electronic devices to electric vehicles—they have become an indispensable energy carrier. However, the massive generation of used batteries has also brought severe environmental challenges and resource wastage issues. How to efficiently and environmentally treat used batteries has become a focus of social concern. Among various treatment reagents, sodium persulfate has shown significant advantages in the field of used battery treatment due to its unique chemical properties.

I. Mild Reaction, Reduced Equipment Wear

Traditional used battery treatment often relies on highly corrosive reagents such as strong acids and alkalis. These reagents react violently with battery materials, causing severe corrosion to processing equipment. With prolonged use, key components of the equipment are prone to damage, which not only increases maintenance frequency but may also lead to premature equipment failure, significantly raising processing costs.

In contrast, sodium persulfate, after proper activation (e.g., heating or adding catalysts), can efficiently decompose battery materials through strong oxidizing free radicals under weakly acidic conditions and relatively low temperatures. These controllable reaction conditions effectively reduce the risk of corrosion to processing equipment. The sodium persulfate produced by Fujian Zhanhua Chemical, owing to its high purity and stability, ensures efficient reactions under mild conditions, further minimizing equipment wear.

II. Efficient Leaching, Improved Resource Recovery Efficiency

Used batteries contain various valuable metal resources such as lithium, nickel, and cobalt. Effective recovery not only alleviates resource shortages but also offers economic benefits. In used battery treatment, sodium persulfate demonstrates excellent leaching capabilities for these valuable metals.

In specific treatment processes, sodium persulfate often works synergistically with dilute acids (e.g., sulfuric acid) to help destroy the crystal structure of cathode materials and oxidize metals like cobalt and manganese, significantly enhancing the acid's leaching effect on lithium, nickel, cobalt, and other metals. This creates favorable conditions for subsequent metal extraction and purification.

Compared to some traditional leaching reagents, sodium persulfate achieves higher metal recovery rates in a shorter time, greatly improving resource recovery efficiency and enabling more efficient utilization of limited resources.

III. Environmental Friendliness, Reduced Secondary Pollution

Environmental protection is a core principle of used battery treatment. Traditional treatment methods are prone to causing secondary pollution: for example, pyrometallurgy emits toxic sulfur dioxide exhaust gases, conventional acid leaching produces high-concentration acidic wastewater containing heavy metals, and the residual slag still contains toxic heavy metals, making subsequent treatment difficult and costly.

Sodium persulfate, however, exhibits clear environmental advantages in used battery treatment. On one hand, the reaction process does not generate harmful gases such as sulfur dioxide or nitrogen oxides, reducing atmospheric pollution at the source. On the other hand, its by-products are mainly sulfates, which, although increasing wastewater salinity, can be easily removed by adding lime for precipitation. Overall, the environmental burden is significantly lower compared to traditional methods, greatly reducing the risk of secondary pollution and providing strong support for the green treatment of used batteries.

Conclusion

Sodium persulfate, with its numerous advantages such as mild reaction conditions, efficient leaching, and environmental friendliness, holds great potential in the field of used battery treatment.  as the world's largest producer of persulfates, has an annual sodium persulfate production capacity of 50,000 tons, which will expand to 90,000 tons after the completion of its third-phase project. Leveraging technological expertise and large-scale production, the company excels in production capacity, product quality, and stability. Its sodium persulfate strictly adheres to international quality standards, with rigorous control from raw material selection and process management to packaging and transportation, providing high-specification and highly reliable raw material support for used battery recycling and treatment.