@article{Peng2025, 
author = {Linfeng Peng and Tianyu Lei and Shijie Cheng and Jia Xie},
title = {Synergistic fluorine–nitrogen interfaces enabling stable high-voltage sulfide-based all-solid-state lithium metal batteries},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {8},
pages = {94907614},
keywords = {long-term cycling, lithium metal, all-solid-state lithium metal batteries, high-voltage, sulfide electrolytes},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907614},
doi = {10.26599/NR.2025.94907614},
abstract = {Sulfide-based all-solid-state lithium metal batteries (ASSLMBs) are promising for high-energy-density and safe energy storage. But the poor compatibility of sulfide electrolytes with both high-voltage cathodes and lithium metal anodes hinders their practical application. Here, we disclose a fluorine–nitrogen synergistic interfacial engineering strategy by modifying Li5.5PS4.5Cl1.5 (LPSC) with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). The modified LPSC electrolyte shows a high ionic conductivity of 2.88 mS·cm−1. Moreover, LiTFSI induced dual-functional interphases, a fluorine-rich cathode–electrolyte interphase (CEI) (LiF/LixPOyFz) and a fluorine–nitrogen composite solid electrolyte interphase (SEI, Li3N/LiF/LixPOyFz), contributing to high oxidation stability (LiNi0.8Co0.1Mn0.1O2//LiIn battery retains 107% capacity retention after 13,000 cycles at 15 C) and excellent lithium dendrite inhibition ability (Li//Li: critical current density (CCD) 3.4 mA·cm−2, stably cycling 2600 h at 0.5 mA·cm−2). As a result, the LiNi0.8Co0.1Mn0.1O2//Li cell with modified electrolyte demonstrates 1000 stable cycles at a high cut-off voltage of 4.5 V and wide-temperature adaptability (−20–50 °C). This work shows a facile and effective method for constructing long-life and high-energy-density sulfide based ASSLMBs.}
}