Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 10, Issue 33, Pages 17185-17198Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta05119b
Keywords
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Funding
- National Natural Science Foundation of China [51802261, 52072217, 22179071, 51572194]
- Key project of Education Department of Hubei Province [D20211201]
- Major Technological Innovation Project of Hubei Science and Technology Department [2019AAA164]
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Hierarchical double-shelled nanoboxes with nitrogen-doped carbon outer shell supported on nanosheet-constructed Cu2MoS4 inner shell (Cu2MoS4@NC) were synthesized using a multistep template-engaged strategy. The Cu2MoS4@NC exhibited excellent electrochemical properties, reversible capacity, rate capability, and cycling stability. The research findings are expected to boost the development and application of metal sulfide-based anodes in sodium-ion batteries and beyond.
Bimetal and/or mixed-metal sulfides have received significant attention for efficient sodium storage due to their high capacity and decent redox activity. However, the poor-rate capability and fast capacity decay dramatically impede their practical application in sodium-ion batteries (SIBs). Herein, a facile multistep template-engaged strategy has been developed to rationally synthesize hierarchical double-shelled nanoboxes with the nitrogen-doped carbon outer shell supported on the nanosheet-constructed Cu2MoS4 inner shell (Cu2MoS4@NC). Benefiting from the unique structure and composition, the Cu2MoS4@NC as a SIB anode delivers excellent electrochemical properties in terms of reversible capacity, rate capability, and cycling stability. Furthermore, electrode kinetics is systematically studied, providing a valuable revelation for understanding its performance evolution. Particularly, the stepwise (re)conversion mechanism involved in the (de)sodiation process for Cu2MoS4@NC has been revealed by in/ex situ measurements, demonstrating that the non-reacted component can act as a temporary buffer/conductor for the reacted one to improve sodium storage. Finally, promising potential in practical application is exhibited, where a designed Cu2MoS4@NC||Na3V2(PO4)(2)F-3/C full cell retains a reversible capacity of 166 mA h g(-1) after 1000 cycles at 1.0 A g(-1). The research strategy and findings presented herein are expected to boost the development and application of metal sulfide-based anodes in SIBs and beyond.
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