Dr. Xie Wei delivered a keynote speech titled Industrialization Progress of Fluorine-free Membranes and Iron-sulfur Flow Batteries
Classification：Company News
- Author：ZH Energy
- Release time：Mar-05-2025
【 Summary 】Dr. Wei Xie, Founder and Chief Scientist of Zhonghe Energy , was invited to attend the Fourth China Flow Battery Energy Storage Conference (CFE2025).
On March 3rd - 4th, the CFE2025 4th China Flow Battery Energy Storage Conference and Exhibition and the CFE2025 China Flow Battery Young Scientist Forum were grandly held in Hangzhou. As a barometer of the development of the flow battery industry chain, this event attracted over a thousand industry experts, representatives from leading companies, and elites from upstream and downstream of the industry chain to jointly draw the blueprint for the flow battery energy storage ecosystem.
Dr. Xie Wei, founder and chief scientist of Zhonghe Energy , was invited to attend and deliver a speech on the theme of "Industrial Progress of Non-fluorine Membranes and Sulfur Iron Batteries".
At the forum, Dr. Xie Wei shared the implementation path of Zhonghe Energy in innovating and reducing the cost of core key materials for flow batteries, and emphasized the cost advantages and application prospects of sulfur iron flow battery innovative technology. Dr. Xie pointed out that the non-fluorine ion exchange membrane series products of Zhonghe Energy have entered the commercial application stage. Through multi-level structural design, the past shortcomings of non-fluorine ion exchange membrane materials in terms of chemical stability, ionic conductivity, and ionic selectivity have been successfully resolved. While achieving battery performance comparable to Nafion membranes, the cost has been reduced by over 80%. Existing mature products include PBI flow battery membranes and PBI fuel cell membranes, which can be applied to fields such as flow batteries, fuel cells, hydrogen energy, and metal ion separation.
Aiming at the current market pain points of high installation costs for all-vanadium flow batteries and limited vanadium resources, Zhonghe Energy has independently developed high-performance and low-cost sulfur iron flow battery technology. The core innovation of this technology lies in the use of a pure liquid sulfur iron electrolyte system, avoiding the generation of metal dendrites during charging and discharging that can damage batteries or reduce capacity. The electrolyte cost is 85% lower than that of mainstream all-vanadium flow batteries. Under the premise of inherent safety and low cost, it can achieve application scenarios covering a storage duration of 6-12 hours. Moreover, iron and sulfur resources are abundant, with no resource limitation pressure and stable prices.
As the world's earliest company to commercialize sulfur iron battery technology, the sulfur iron battery technology verification system jointly implemented with State Grid has been stably operating for two months, with all performance indicators meeting design requirements. The company will construct a megawatt-hour level engineering demonstration project in 2025.
Zhonghe Energy is using "new-quality productivity" as an engine, focusing on long-duration storage technology innovation and full-chain layout of flow batteries, and creating a low-cost, high-safety, long-duration energy storage system solution with a "technology breakthrough - engineering verification - industry impact" triple attack, working with global partners to break through the energy transformation bottleneck and lead the green low-carbon future.
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