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Multiple Ambient Hydrolysis Deposition of Tin Oxide into Nanoporous Carbon as a Stable Anode for Lithium-Ion Batteries

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https://ir.library.oregonstate.edu/concern/articles/jh343v21w

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  • We introduce a novel ambient hydrolysis deposition (AHD) methodology that, for the first time, employs sequential water adsorption followed by a hydrolysis reaction to infiltrate tiny SnO2₂ particles inside nanopores of mesoporous carbon in a conformal and controllable manner. The empty space in the SnO2₂/C composites can be adjusted by varying the number of AHD cycles. A SnO2₂/C composite with an intermediate SnO2₂ loading exhibits an initial specific delithiation capacity of 1054 mAh/g as an anode for Li-ion batteries (LIBs). The capacity contribution from SnO2₂ in the composite electrode of SnO2₂ (1494 mAh/g) when considering that both Sn alloying and SnO2₂ conversion reactions are reversible. The composite shows a specific capacity of 573 mAh/g after 300 cycles, one of the most stable cycling performances for the SnO2₂/mesoporous carbon composites. Enabled by the controllable AHD coatings, our results demonstrated the importance of the well-tuned empty space in nanostructured composites to accommodate the expansion of electrode active mass during alloying/dealloying and conversion reactions.
  • Keywords: Sequential, Mesoporous materials, Tin, Lithium-ion batteries, Nanoparticles, SnO2₂/C composite, Electrochemistry, Hydrolysis deposition
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  • Raju, V., Wang, X., Luo, W. & Ji, X. (2014). Multiple Ambient Hydrolysis Deposition of Tin Oxide into Nanoporous Carbon To Give a Stable Anode for Lithium-Ion Batteries. Chemistry-A European Journal, 20(25), 7686-7691. doi:10.1002/chem.201402280
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  • 20
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  • 25
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  • X. J. gratefully acknowledges the financial support from Oregon State University. We appreciate the help from Teresa Sawyer, and Dr. Peter Eschbach for their help in TEM measurements in OSU EM Facility that is funded by National Science Foundation, Murdock Charitable Trust and Oregon Nanoscience and Microtechnologies Institute.
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