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Bismuth has emerged as a promising anode material for sodium-ion batteries (SIBs), owing to its high capacity and suitable operating potential. However, large volume changes during alloying/dealloying processes lead to poor cycling performance. Herein, bismuth nanoparticle@carbon (Bi@C) composite is prepared via a facile annealing method using a commercial coordination compound precursor of bismuth citrate. The composite has a uniform structure with Bi nanoparticles embedded within a carbon framework. The nanosized structure ensures a fast kinetics and efficient alleviation of stress/strain caused by the volume change, and the resilient and conductive carbon matrix provides an interconnected electron transportation pathway. The Bi@C composite delivers outstanding sodium-storage performance with an ultralong cycle life of 30 000 cycles at a high current density of 8 A g(-1) and an excellent rate capability of 71% capacity retention at an ultrahigh current rate of 60 A g(-1). Even at a high mass loading of 11.5 mg cm(-2), a stable reversible capacity of 280 mA h g(-1) can be obtained after 200 cycles. More importantly, full SIBs by pairing with a Na3V2(PO4)(3) cathode demonstrates superior performance. Combining the facile synthesis and the commercial precursor, the exceptional performance makes the Bi@C composite very promising for practical large-scale applications.
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ADVANCED MATERIALS
ISSN: 0935-9648
Year: 2019
Issue: 48
Volume: 31
2 7 . 3 9 8
JCR@2019
2 7 . 4 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:236
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 238
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: