Toward High‐Performance, Flexible, Photo‐Assisted All‐Solid‐State Sodium‐Metal Batteries: Screening of Solid‐Polymer‐Based Electrolytes Coupled with Photoelectrochemical Storage Cathodes
Abstract
Abstract The advancement of photo‐assisted rechargeable sodium‐metal batteries with high energy efficiency, lightweight structure, and simplified design is crucial for the growing demand in portable electronics. However, addressing the intrinsic safety concerns of liquid electrolytes and the sluggish reaction kinetics in existing photoelectrochemical storage cathodes (PSCs) remains a significant challenge. In this work, functionalized light‐driven composite solid electrolyte (CSE) fillers are systematically screened, and optimized PSC materials are employed to construct advanced photo‐assisted solid‐state sodium‐metal battery (PSSMB). To further enhance the mechanical properties and poly(ethylene oxide) compatibility of the CSE, natural lignocellulose is incorporated, enabling the fabrication of flexible PSSMBs. In situ tests and density functional theory calculations reveal that the light‐driven electric field facilitated sodium salt dissociation, reduced interfacial resistance, and improved ionic conductivity (0.1 mS cm −1 ). Meanwhile, energy‐level matching of the PSC maximized the utilization of photogenerated carriers, accelerating reaction kinetics and enhancing interface compatibility between the electrolyte and cathode. The resulting flexible pouch‐type PSSMB demonstrates a remarkable discharge capacity of 117 mAh g −1 and outstanding long‐term cycling stability, retaining 89.1% of its capacity and achieving an energy storage efficiency of 96.8% after 300 cycles at 1 C. This study highlights a versatile strategy for advancing safe, high‐performance solid‐state batteries.
Article Details
Authors (10)
Rong‐Hao Wang
School of Engineering Science Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD) University of Science and Technology of China Hefei Anhui People's Republic of China
Yu‐Zhen Zhang
Department of Chemistry Research Center for Molecular Recognition and Synthesis State Key Laboratory of Green Chemical Synthesis and Conversion Fudan University Shanghai China
Weiyi Wang
Division of Energy Conversion & Storage, Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), School of Engineering Science
Jia‐Hao Ni
Division of Energy Conversion & Storage Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD) School of Engineering Science University of Science and Technology of China Hefei China
Wei Hu
Liang Yue
Wan‐Qun Zhang
Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD) School of Engineering Science University of Science and Technology of China Hefei Anhui 230026 China
Gang Pei
Shangfeng Yang
Li‐Feng Chen
School of Engineering Science Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD) University of Science and Technology of China Hefei Anhui People's Republic of China