Sb₂S₃@SnO₂ hetero-nanocomposite as high-performance anode material for sodium-ion battery

ABSTRACT

A novel Sb₂S₃/SnO₂ bundle-like nanocomposite has been synthesized via a facile solution method followed by a hydrothermal process. When used as the anode material for sodium-ion battery (SIB), this material with unique hetero-nanostructure shows superior electrochemical performance to those of individual Sb₂S₃ and SnO₂. The Sb₂S₃/SnO₂ anode shows an initial reversible capacity of 711.4 mAh/g and remains at 81.9% of the initial performance after 100 cycles at a current density of 50 mA/g. The enhanced performance is ascribed to unique hetero nanostructure with synergetic effect between Sb₂S₃ and SnO₂ in Sb₂S₃/SnO₂ composite, which can enhance both the electronic and ionic conductivities of the anode and reduce the volume change during the charge and discharge processes. The high electrochemical performance indicates that the combination of Sb₂S₃ and SnO₂ to form hetero nanocomposite is a promising strategy for fabricating high-performance SIB anodes.

KEYWORDS:

• Sb₂S₃@SnO₂ nanocomposite
• heterostructures
• anode
• sodium-ion battery
• core-shell

Declaration of competing interest

The authors declare that there is no interest for this manuscript.

Suppelementary material

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Additional information

Funding

The authors would thank the support from Shanghai Education Ministry and Shanghai University Ph.D. Program, National Natural Sciecne Foundation of China [51774251], the Hebei Science Foundation for Distinguished Young Scholars [B2017203313), Hundreds of Innovative Talents in Hebei Province [SLRC2017057], the opening project of the state key laboratory of Advanced Chemical Power Sources [SKL-ACPS-C-11].