Optimized Electrolyte with High Electrochemical Stability and Oxygen Solubility for Lithium–Oxygen and Lithium–Air Batteries

Journal Article · Fri Jul 10 04:00:00 EDT 2020 · ACS Energy Letters

DOI:https://doi.org/10.1021/acsenergylett.0c00809· OSTI ID:1646826

Kwak, Wonjin ^[1]; Chae, Sujong ^[1]; Feng, Ruozhu ^[1]; Gao, Peiyuan ^[1]; Read, Jeffrey ^[2]; Engelhard, Mark H. ^[1]; Zhong, Lirong ^[1]; Xu, Wu ^[1]; Zhang, Jiguang ^[1]

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1. BATTELLE (PACIFIC NW LAB)
2. U.S. Army Research Laboratory

Lithium-oxygen (Li-O2) batteries with high reversibility require a stable electrolyte against the side reactions with Li metal anode and reactive oxygen species. Moreover, an electrolyte which can effectively utilize the low partial pressure of oxygen in atmosphere has significance effect on the practical application lithium-air batteries. In this study, we developed a localized high concentration electrolyte (LHCE) using 1H,1H,5H-Octafluoropentyl 1,1,2,2-tetrafluoroethyl ether (OTE) as a diluent, which satisfies all these conditions at the same time. The OTE-based LHCE exhibits much improved electrochemical performances in Li-O2 batteries and Li-air batteries compared to the conventional electrolyte and high concentration electrolyte. The design principle of this novel electrolyte also provides an important guideline and reference for future researches of electrolytes in Li-O2 and Li-air batteries.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1646826
• Report Number(s): PNNL-SA-150369
• Journal Information: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 7 Vol. 5
• Country of Publication: United States
• Language: English

Related Subjects

lithium air batteries
Localized high concentration electrolyte
Electrolyte
Oxygen solubility