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

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