Xu Liu, Alessandro Mariani, Thomas Diemant, Maria Enrica Di Pietro, Xu Dong, Po-Hua Su, Andrea Mele and Stefano Passerini*,
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PFAS-Free Locally Concentrated Ionic Liquid Electrolytes for Lithium Metal Batteries
Locally concentrated electrolytes are promising candidates for highly reversible lithium–metal anodes (LMAs) but heavily rely on cosolvents containing −CF3 and/or −CF2– groups. The use of these hazardous per- and polyfluoroalkyl substances (PFAS) leads to environmental and occupational safety concerns. Herein, ionic liquids and anisole are employed as solvents and cosolvent, respectively, to construct PFAS-free locally concentrated electrolytes. Anisole not only promotes the ion transport of the electrolytes via inducing a nanophase-segregation solution structure but also modulates the solid electrolyte interphase by affecting the deposition of organic cations and anions on LMAs as well as the conversion of anions to LiF. Optimizing the anisole content enables Li plating/stripping Coulombic efficiency up to 99.71% from 99.19% achieved with the anisole-free ionic liquid electrolyte. As a result, Li/LiFePO4 and Li/sulfurized-polyacrylonitrile cells employing such an electrolyte and 1.5-fold lithium metal excess achieve stable cycling for 400 and 350 cycles, respectively, with 90% capacity retention.
ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment
CiteScore
31.20
自引率
5.00%
发文量
469
审稿时长
1 months
期刊介绍:
ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format.
ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology.
The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.