Cellulose nanofiber‐derived carbon aerogel for advanced room‐temperature sodium–sulfur batteries

Room-temperature sodium–sulfur (RT/Na–S) batteries are regarded as promising large-scale stationary energy storage systems owing to their high density and low cost well the earth-abundant reserves of sodium sulfur. However, diffusion polysulfides sluggish kinetics conversion reactions still major challenges for application. Herein, we developed a powerful functional separator inhibit shuttle effect by coating lightweight three-dimensional cellulose nanofiber-derived carbon aerogel on glass fiber (denoted [email protected]). The hierarchical porous structures, favorable electronic conductivity, interconnected network N,S-codoped endow multifunctional with strong polysulfide anchoring capability fast reaction conversion, which can act barrier layer an expanded current collector increase sulfur utilization. Moreover, hetero-doped N/S sites believed strengthen via chemisorption accelerate redox is confirmed from experimental theoretical results. As result, assembled Na–S coin cells protected] showed reversible capacity (788.8 mAh g−1 at 0.1 C after 100 cycles) superior cycling stability (only 0.059% decay per cycle over 1000 cycles 1 C), thereby demonstrating significant potential application in high-performance RT/Na–S batteries.