Monodisperse CoSb nanocrystals as high-performance anode material for Li-ion batteries. Issue 89 (22nd October 2020)

• Record Type: Journal Article
• Authors: Wang, Shutao; He, Meng; Walter, Marc; Kravchyk, Kostiantyn V.; Kovalenko, Maksym V.
• Is Part Of: Chemical communications. Volume 56:Issue 89(2020)
• Page Start: 13872
• Page End: 13875
• Publication Date: 2020-10-22
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc06222g
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : 20 nm CoSb NCs delivered a high initial Li-ion storage capacity of 544 mA h g −1 at a current density of 660 mA g −1, and at least 82% of this capacity was retained after 1000 cycles. Abstract : Towards enhancement of the power density of Li-ion batteries (LIBs), antimony-based intermetallic compounds have recently attracted considerable attention as compelling anode materials owing to their high rate capability as compared to state-of-the-art graphite anodes. Here we report a facile colloidal synthesis of monodisperse CoSb nanocrystals (NCs) as a model intermetallic anode material for LIBs via the reaction between Co NCs and SbCl3 in oleylamine under reducing conditions. We found that ca. 20 nm CoSb NCs exhibit enhanced cycling stability as compared to larger ca. 40 nm CoSb NCs and Sb NCs with size on the order of 20 nm.