2025/08/14 by Tianle Zheng, Mengqi Wu, Jianwei Xiong +19 · 1 voice
Engineering · #Advancements in Battery Materials #Advanced Battery Materials and Technologies #Extraction and Separation Processes
paper · pdf · doi:10.1002/anie.202511336
openalex publication_date 2025/08/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Lithium metal batteries (LMBs) face challenges from unstable and fragile solid electrolyte interphases (SEIs). In this work, we successfully develop a novel electrolyte by effectively modulating the competitive solvation process in LMBs. In this formulation, the C─O─C motifs of glymes are competitively substituted by other anions and solvents to achieve single oxygen site coordination, thereby facilitating a weak solvation effect. At an apparent concentration of 1.25 M, a solvated sheath enriched with anions and single oxygen-bound complexes is formed, which significantly enhances lithium metal compatibility and promotes rapid desolvation kinetics. The designed electrolyte using weakly solvated structures exhibits remarkable stability at both 25° and 80 °C, enabling the lithium iron phosphate (LFP)||Li cell to achieve over 2000 cycles (capacity retention: 90%) and 500 cycles (capacity retention: 96%), respectively. Interestingly, the low N/P ratio LFP||Li (N/P = 1.8) full battery maintains a stable capacity over 50 cycles, and the commercial 1.1 Ah LFP||Li pouch cell shows a great stability (capacity retention: 91.0%, CE: 99.82%) over 20 cycles. The distinctive solvation regulation strategy has paved a novel research avenue for the realization of high-performance LMBs.