A Superior Sodium/Lithium-Ion Storage Material: Sea Sponge C/Sn2Fe@GOClick to copy article linkArticle link copied!
- Weixi YanWeixi YanShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, ChinaMore by Weixi Yan
- Qingnan WuQingnan WuCollege of Plant Protection, Henan Agricultural University, Zhengzhou 450002, ChinaMore by Qingnan Wu
- Ming Wen*Ming Wen*E-mail: [email protected] (M.W.).Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, ChinaMore by Ming Wen
- Shipei ChenShipei ChenShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, ChinaMore by Shipei Chen
- Qingsheng WuQingsheng WuShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, ChinaMore by Qingsheng Wu
- Nicola PinnaNicola PinnaInstitut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, Berlin 12489, GermanyMore by Nicola Pinna
Abstract

A well-structured anode nanomaterial, which can ensure electron and ion transport and avoid excessive pulverization, is of crucial importance to achieve high capacity with superior cycling stability for both sodium- and lithium-ion batteries (SIBs and LIBs). For the purpose of a superior rate performance, this work here has designed and successfully synthesized a new Na+/Li+ storage nanomaterial of SCS/Sn2Fe@GO through loading of a Sn2Fe nanoalloy on sea-sponge-like carbon spheres (SCSs), followed by a graphene oxide (GO) wrapping process. In such a designed composite, the SCS skeleton ensures electronic conductivity and shorts Na+ and Li+ diffusion pathways, while the Sn2Fe nanoalloy delivers a high capacity and prevents excessive pulverization. The GO shell around SCS/Sn2Fe greatly enhances the cyclability. Used as an anode, the SCS/Sn2Fe@GO nanocomposite enables a high capacity up to 660 mAh g–1 at 50 mA g–1, which is maintained without decay up to 800 cycles in SIBs, and up to 850 mAh g–1 at 500 mA g–1 after 3500 cycles in LIBs, proving its applicability in new-generation SIBs and LIBs.
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