Designing Cellulose Triacetate‐Based Universal Binder for High‐Voltage Sodium‐Ion Battery Cathodes with Enhanced Ionic Conductivity and Binding Strength

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Binders play a pivotal role in the performance of sodium-ion battery (SIB) cathodes, but traditional binders often struggle to balance broad compatibility, high ionic conductivity, superior binding strength, and environmental sustainability. In this study, universal cellulose triacetate (TAC)-based binder (TAC-MMT) composed TAC natural montmorillonite (MMT) is designed facilitate rapid Na+ transport pathways establish robust hydrogen-bonding network. This innovative TAC-MMT features unique chemical structure that achieves conductivity through self-enrichment fast-transport mechanism, while its strength attributed crosslinks between proton acceptors (C═O) donors (-OH) MMT. More importantly, outstanding solubility film-forming properties contribute stable electrode protection compatibility with high-voltage SIB cathodes. Benefiting from these advantages, Na3V2(PO4)2O2F (NVPOF) electrodes demonstrate exceptional performance, including capacity retention 95.2% over 500 cycles at 5C rate response up 15C. The versatility further confirmed NaNi1/3Fe1/3Mn1/3O2 Na0.61[Mn0.27Fe0.34Ti0.39]O2 study highlights potential biomass-based as sustainable effective solution for advancing high-performance batteries.

Language: Английский

Recent Progress on Solid-State Electrolytes based on Nanocellulose: Structures, Applications, and Challenges

Materials Today Energy, Journal Year: 2025, Volume and Issue: 51, P. 101891 - 101891

Published: April 22, 2025

Language: Английский