A Superior Sodium/Lithium-Ion Storage Material: Sea Sponge C/Sn2Fe@GO

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 perfor...

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Bibliographic Details
Published in:Inorganic chemistry 2019-06, Vol.58 (12), p.7915-7924
Main Authors: Yan, Weixi, Wu, Qingnan, Wen, Ming, Chen, Shipei, Wu, Qingsheng, Pinna, Nicola
Format: Article
Language:English
Online Access:Get full text
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Summary: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.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.9b00621