Back-Adhesive Hybrid Solid Electrolyte with Regulated Surface Adhesion Realizing Enhanced Interfacial Kinetics and Stability in Solid-State Sodium Metal Batteries

作者：Dongrong Yang, Huangkai Zhou, Baowen Wang, Kun Ren, Pan Liu, Yingjie Zhou, Da Zhang, Shengping Hou, Fupeng Li, Minjie Hou, Yongqing Cai, Haijun Wu, Bin Yang, Feng Liang · 发表于：ACS Energy Letters · 年份：2025 · DOI：10.1021/acsenergylett.5c01155 · 被引用次数：8 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Inorganic Chemistry and Materials

Achieving intimate interfacial contact and dendrite suppression at electrolyte interfaces is critical in order for solid-state sodium-metal batteries (SSSBs) to become next-generation energy storage systems. Herein, a surface adhesion regulation strategy using a Na 3 Zr 2 Si 2 PO 12 (NASICON)–polymer hybrid approach is introduced to design laminated hybrid solid electrolytes (LHSEs) with asymmetric rigid-adhesive surfaces. This design simultaneously enhances interfacial kinetics at the cathode and improves anode stability. Experiments and DFT calculations show that a new NASICON–polymer interface phase reduces the energy barrier for Na + transport, enhancing ion migration efficiency. The optimized SEs5040, comprising 50% NASICON and 40% NASICON hybrid solid electrolyte (HSE) heterogeneous layers, exhibits a critical current density of 1.5 mA cm –2, and the Na/SEs5040/Na 3 V 2 (PO 4 ) 3 cell retains 86.2% capacity after 1795 cycles at 2 C. These findings offer insights into optimizing interfacial contacts and suppressing dendrites in SSSBs.