文献类型：期刊文献

英文题名：A Novel Janus-StructuredComposite Polymer ElectrolyteConstructs a Stable Electrode/Electrolyte Interface for a Solid LithiumMetal Battery

作者：Cong, Yuchen[1];Su, Haiping[1];Shang, Yazhuo[1];Liu, Honglai[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：65

期号：28

起止页码：14720

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20263021160816);Scopus(收录号：2-s2.0-105045380635);WOS:【SCI-EXPANDED(收录号:WOS:001815946400001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503501), Shanghai Basic Research Program "Natural Science Foundation" Project (25ZR1402106), the Shanghai Pilot Program for Basic Research (22T01400100-18).

语种：英文

外文关键词：Amorphous films - Amorphous silicon - Anodes - Composite materials - Lithium - Lithium compounds - Lithium-ion batteries - Nitrogen compounds - Phase interfaces - Silicon compounds - Solid electrolytes - Solid state reactions - Solid-State Batteries - Sulfur compounds

摘要：Composite polymer electrolytes (CPEs) have emerged as promising candidates for solid-state batteries because of their flexibility and safety. However, practical applications remain limited by low lithium-ion conductivity, uneven lithium dendrite growth, and high interfacial impedance, leading to poor Coulombic efficiency and rapid capacity decay. A bilayer CPE with a Janus structure (J-CPE) is proposed for enhancing interfacial compatibility, with the LLZTO-PEO layer (L-CPE) toward the cathode and the Si3N4-PEO layer (S-CPE) toward the Li-metal anode. The amorphous Si3N4 suppresses side reactions between the CPE and Li metal, facilitating a stable and ionically conductive solid electrolyte interface layer film that is rich in Li3N and LiSi x N y . The reduced interfacial resistance promotes uniform Li+ transport and inhibits lithium dendrite growth. Consequently, the Li symmetric cell demonstrates stable cycling at 0.1 mA cm-2 for 1800 h, and the Li|J-CPE|LFP full cell delivers 600 cycles at 1C with an 86.0% capacity retention. This J-CPE strategy offers new insights for improving interfacial stability in solid-state batteries.