In Situ Designing a Gradient Li+ Capture and Quasi-Spontaneous Diffusion Anode Protection Layer toward Long-Life Li-O2 Batteries.
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In-situ designing a gradient Li+ capture and quasi-spontaneous diffusion anode protection layer towards long-life Li-O2 batteries.pdf
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ArticleKAUST Department
Physical Science and Engineering (PSE) DivisionDate
2020-08-09Online Publication Date
2020-08-09Print Publication Date
2020-09Embargo End Date
2021-08-11Submitted Date
2020-06-18Permanent link to this record
http://hdl.handle.net/10754/664601
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Lithium metal is the only anode material that can enable the Li-O2 battery to realize its high theoretical energy density (≈3500 Wh kg-1 ). However, the inherent uncontrolled dendrite growth and serious corrosion limitations of lithium metal anodes make it experience fast degradation and impede the practical application of Li-O2 batteries. Herein, a multifunctional complementary LiF/F-doped carbon gradient protection layer on a lithium metal anode by one-step in situ reaction of molten Li with poly(tetrafluoroethylene) (PTFE) is developed. The abundant strong polar C-F bonds in the upper carbon can not only act as Li+ capture site to pre-uniform Li+ flux but also regulate the electron configuration of LiF to make Li+ quasi-spontaneously diffuse from carbon to LiF surface, avoiding the strong Li+ -adhesion-induced Li aggregation. For LiF, it can behave as fast Li+ conductor and homogenize the nucleation sites on lithium, as well as ensure firm connection with lithium. As a result, this well-designed protection layer endows the Li metal anode with dendrite-free plating/stripping and anticorrosion behavior both in ether-based and carbonate ester-based electrolytes. Even applied protected Li anodes in Li-O2 batteries, its superiority can still be maintained, making the cell achieve stable cycling performance (180 cycles).Citation
Yu, Y., Huang, G., Wang, J., Li, K., Ma, J., & Zhang, X. (2020). In Situ Designing a Gradient Li + Capture and Quasi-Spontaneous Diffusion Anode Protection Layer toward Long-Life Li−O 2 Batteries. Advanced Materials, 2004157. doi:10.1002/adma.202004157Sponsors
Y.Y., G.H., and J.-Z.W. contributed equally to this work. This work was financially supported by the National Key R&D Program of China (2016YFB0100103), the National Natural Science Foundation of China (21725103), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA21010210), the Jilin Province Science and Technology Development Plan Funding Project (20180101203JC, 20200201079JC), and the Changchun Science and Technology Development Plan Funding Project (19SS010). We also appreciated the kind help from National & local united engineering lab for power battery in Northeast Normal University.Publisher
WileyJournal
Advanced MaterialsPubMed ID
32776397Additional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202004157ae974a485f413a2113503eed53cd6c53
10.1002/adma.202004157
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