DOI: 10.1002/aenm.201200776. Enhanced Cycling Performance of Li‐O<sub>2</sub> Batteries by the Optimized Electrolyte Concentration of LiTFSA in Glymes

Enhanced Cycling Performance of Li‐O2 Batteries by the Optimized Electrolyte Concentration of LiTFSA in Glymes

10.1002/aenm.201200776

Crossref journal-article

Wiley

Advanced Energy Materials (311)

Abstract

AbstractA series of non‐aqueous electrolytes were prepared by dissolving lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) in triglyme and tetraglyme (Gx, x = 3 and 4), respectively, with varied molar ratios. With the electrolytes the cycling performance of Li‐O2 batteries showed a strong dependence on the molar ratios between LiTFSA and Gx. It was found that the molar ratio of 1 to 5 was critical for the cycling‐performance of Li‐O2 batteries. High stability over 20 discharge–recharge cycles at 500 mA/gcarbon and in an O2 flow was obtained in LiTFSA‐(Gx)5 (x = 3 and 4). The discharge product at cathode could be directly detected and identified as the dominant crystalline product Li2O2 on the 1st and 20th discharged electrodes using X‐ray diffraction technique (XRD), which indicates rechargeability and feasibility of the electrolytes LiTFSA‐(Gx)5 (x = 3 and 4) for Li‐O2 batteries. At 1000 mA/gcarbon their capacities could be stabilized for 10 cycles. To our knowledge, this behavior of dependence of cycling performance of Li‐O2 batteries on the concentration of Li salts is presented here for the first time, and it may be extended to other Li salts and solvents and suggest a new route for screening cycling‐stable electrolytes for Li‐O2 batteries.

Bibliography

Li, F., Zhang, T., Yamada, Y., Yamada, A., & Zhou, H. (2012). Enhanced Cycling Performance of LiâO2 Batteries by the Optimized Electrolyte Concentration of LiTFSA in Glymes. Advanced Energy Materials, 3(4), 532â538. Portico.

Authors 5

Fujun Li (first)
Tao Zhang (additional)
Yuki Yamada (additional)
Atsuo Yamada (additional)
Haoshen Zhou (additional)

References 37 Referenced 112

Dates

Type	When
Created	12 years, 8 months ago (Dec. 13, 2012, 7:28 a.m.)
Deposited	1 year, 10 months ago (Oct. 11, 2023, 4:17 p.m.)
Indexed	3 days, 18 hours ago (Sept. 3, 2025, 6:05 a.m.)
Issued	12 years, 8 months ago (Dec. 10, 2012)
Published	12 years, 8 months ago (Dec. 10, 2012)
Published Online	12 years, 8 months ago (Dec. 10, 2012)
Published Print	12 years, 5 months ago (April 1, 2013)

Funders 0

None

BibTeX

@article{Li_2012, title={Enhanced Cycling Performance of Li‐O2 Batteries by the Optimized Electrolyte Concentration of LiTFSA in Glymes}, volume={3}, ISSN={1614-6840}, url={http://dx.doi.org/10.1002/aenm.201200776}, DOI={10.1002/aenm.201200776}, number={4}, journal={Advanced Energy Materials}, publisher={Wiley}, author={Li, Fujun and Zhang, Tao and Yamada, Yuki and Yamada, Atsuo and Zhou, Haoshen}, year={2012}, month=dec, pages={532–538} }

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