DataVXACS Energy LettersPaper
journal article·2024-08-09Open access

A Coordinated-Anion-Enriched Electrolyte for Lean-Electrolyte Li–S Batteries

Kaiqiang Qin, Shi Li, Dean Yen, Weiran Zhang, Zhenzhen Yang, Ethan Phillip Kamphaus, Eric Youngsam Kim, Jinghao Huang, John J. Shea, Enyuan Hu, Lei Cheng, Chunsheng Wang, Chao Luo

ACS Energy Letters· Volume 9· Issue 8
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Source abstract

Abstract

The solid electrolyte interphase (SEI) on Li and cathode electrolyte interphase (CEI) at sulfurized polyacrylonitrile (SPAN) formed in the commonly used liquid electrolytes cannot accommodate the large volume change of both Li anode and SPAN cathode, resulting in severe electrolyte and Li consumption and fast capacity decay under high mass loading and lean electrolyte conditions. Herein, a LiF-rich SEI and a LiF–Li x N y O z coenriched CEI are simultaneously formed by adding ionic liquid (Py 13 TFSI) in the localized high-concentration electrolyte (LHCE), which forms a coordinated-anion-enriched solvation structure. The LiF-rich interphase results in less stress/strain during large volume changes of Li and SPAN, therefore achieving obviously improved stability even at a high areal capacity. Consequently, Li (50 μm)||SPAN (6 mg cm –2 ) pouch cells under the lean electrolyte conditions (E/S ratio of 5 mL g SPAN –1 ) deliver a stable cycle life of 120 cycles with 79.2% capacity retention, demonstrating great promise for high-energy-density lithium–sulfur batteries.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, United States

Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States

Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States

Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States

Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States

Department of Chemical, Environmental, and Materials Engineering, University of Miami, Coral Gables, Florida 33146, United States

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States

Quantum Science & Engineering Center, George Mason University, Fairfax, Virginia 22030, United States

Funding

Vehicle Technologies Program · Office of Science · George Mason University · University of Miami

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