Manipulating Quasi‐Solid‐State Sulfur Conversion in Room‐Temperature Na─S Batteries

作者：Xue Li, Xiang Huang, Hengjia Shao, Yeqing Yang, Mingyue Yang, Xiaocong Shen, Hailong Cheng, Lei Wang, Hua‐Kun Liu, Zhe Hu, Jianping Yang, Yun‐Xiao Wang · 发表于：Advanced Functional Materials · 年份：2026 · DOI：10.1002/adfm.75443 · 被引用次数：1 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Thermal Expansion and Ionic Conductivity

ABSTRACT Surface‐localized quasi‐solid‐state sulfur conversion significantly enhances cyclability of room‐temperature sodium‐sulfur (RT Na─S) batteries, yet the intrinsically limited ion/electron transport within the confined reaction zone leads to high polarization and poor long‐term stability. Herein, we elaborate nitrogen‐doped hierarchical porous carbon nanoplates (N‐HPC) as a multifunctional sulfur host to kinetically manipulate surface‐localized quasi‐solid‐state sulfur conversion. The interconnected micro/mesopores provide robust physical confinement for sulfur, while the abundant N‐doping sites synergistically regulate the electronic structure of carbon matrices, thereby enhancing chemical affinity for polysulfides and catalyzing sulfur redox reactions. The resulting RT Na─S batteries achieve an ultra‐stable cycling performance over 2000 cycles at 1.0 C with a negligible capacity fading rate of 0.024% per cycle and exhibit a highrate capacity of 443.1 mA h g −1 at 2.0 C. A practical pouch cell further demonstrates a high reversible capacity of 1339.8 mA h g −1 at 0.1 C with high cycling capacity retention. This work provides a reliable strategy to regulate surface‐localized quasi‐solid‐state sulfur redox reactions, and our findings highlight the synergistic design of the electrode host and electrolyte is key to realizing durable and high‐rate RT Na─S batteries.