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Enhanced Ionic Conduction Behaviors through the Synergistic Integration of MOF FJU-66 and PDDA for the Improving Performance in F-ZAB and AEMWE Applications
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DOI：10.34133/energymatadv.0331.png)
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Abstract
En 中文
With the growing global emphasis on green economy goals, the development of flexible and sustainable energy storage devices has gained marked momentum. Among these, durable and high-performance anion exchange membranes (AEMs) used in flexible zinc-air batteries (F-ZABs) represent a critical area of ongoing research. This study presents an innovative bacterial cellulose (BC)-based alkaline exchange membrane, fabricated through a multi-step process involving the in situ growth of metal-organic frameworks (MOFs) FJU-66, in situ polymerization of poly(diallyldimethylammonium chloride) (PDDA), and subsequent chemical crosslinking to enhance membrane performance. The incorporation of FJU-66 markedly promotes the polymerization of PDDA, resulting in the formation of longer and more regular linear molecular chains. This structural refinement facilitates the construction of a long-range, ordered OH- transport channel within the membrane. The resulting BC@FJU-66/PDDA-B-10 membrane exhibits outstanding properties, including a high ionic conductivity of 162.2 mS/cm at 80 degrees C and excellent mechanical strength, with a tensile strength of 66.4 MPa. When integrated into an F-ZAB, the membrane delivers a remarkable peak power density of 282.4 mW/cm(2). Additionally, in the context of alkaline water electrolysis (AEMWE) using a 30 wt % KOH electrolyte, the membrane achieves an impressive current density of 4.0 A/cm(2) at an applied voltage of 2.42 V. This fabrication approach offers promising insights into the design of high-performance AEMs, contributing to advancements in green energy technologies and environmental sustainability.
Keywords:
ANION-EXCHANGE MEMBRANES
ELECTROLYTES
CELLULOSE
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