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Cobalt oxide 2D nanosheets formed at a polarized liquid|liquid interface toward high-performance Li-ion and Na-ion battery anodes
Date
2023
Abstract
Cobalt oxide (Co3O4)-based nanostructures have the potential as low-cost materials for lithium-ion (Li-ion) and sodium-ion (Na-ion) battery anodes with a theoretical capacity of 890 mAh/g. Here, we demonstrate a novel method for the production of Co3O4 nanoplatelets. This involves the growth of flower-like cobalt oxyhydroxide (CoOOH) nanostructures at a polarized liquid|liquid interface, followed by conversion to flower-like Co3O4 via calcination. Finally, sonication is used to break up the flower-like Co3O4 nanostructures into two-dimensional (2D) nanoplatelets with lateral sizes of 20−100 nm. Nanoplatelets of Co3O4 can be easily mixed with carbon nanotubes to create nanocomposite anodes, which can be used for Li-ion and Na-ion battery anodes without any additional binder or conductive additive. The resultant electrodes display impressive low-rate capacities (at 125 mA/g) of 1108 and 1083 mAh/g, for Li-ion and Na-ion anodes, respectively, and stable cycling ability over >200 cycles. Detailed quantitative rate analysis clearly shows that Li-ion-storing anodes charge roughly five times faster than Na-ion-storing anodes
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Description
Publisher
American Chemical Society
Citation
ACS Applied Materials and Interfaces, 2023
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Holzinger_2023_Cobalt.pdf
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Funding Information
J.N.C. acknowledges the European Research Council Advanced Grant (FUTURE-PRINT) and the Science Foundation Ireland (SFI) grant 11/PI/1087. The authors received support from the Science Foundation Ireland (SFI) funded center AMBER (2-PF-EFM-209152), as well as the facilities of the SFI-funded AML and ARM laboratories. B.K. acknowledges research funding from SFI-IRC pathway under SFI/22/PATH-S/10706. M.D.S. acknowledges the support received from a European Research Council starting grant (agreement no. 716792). A.H. acknowledges the Irish Research Council (IRC) Government of Ireland Postdoctoral Fellowship Award (grant no. GOIPD/2020/8).