A low-cost green lignosulfonic acid/SPEEK composite membrane for iron–chromium redox flow batteries with high performance

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Key Points

The research aims to develop a cost-effective composite membrane that enhances the performance of iron-chromium redox flow batteries.
Developed a lignosulfonic acid and SPEEK composite membrane for ICRFBs
Characterized membrane properties including safety and stability
Assessed performance metrics in battery applications
The composite membrane exhibited significantly improved charge-discharge efficiency
Demonstrated enhanced safety and stability under operational conditions
Resulted in a cost-effective solution for energy storage applications

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Demonstrates high performance of a low-cost lignosulfonic acid/SPEEK membrane for iron-chromium redox flow batteries, highlighting its efficiency.

Iron–chromium redox flow batteries (ICRFBs) have attracted considerable attention due to their high safety, stability, and cost effectiveness.

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Liu et al. (2026) studied this question.

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