Bismuth Nanoparticle@Carbon Composite Anodes for Ultralong Cycle Life and High-Rate Sodium-Ion Batteries.

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ID: 58192
2019
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Abstract
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 and an excellent rate capability of 71% capacity retention at an ultrahigh current rate of 60 A g . Even at a high mass loading of 11.5 mg cm , a stable reversible capacity of 280 mA h g can be obtained after 200 cycles. More importantly, full SIBs by pairing with a Na V (PO ) 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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xiong2019bismuthadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Peixun Xiong, Panxing Bai, Ang Li, Benfang Li, Mingren Cheng, Yiping Chen, Shuping Huang, Qiang Jiang, Xian-He Bu, Yunhua Xu
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Journal advanced materials (deerfield beach, fla)
Year 2019
DOI
10.1002/adma.201904771
URL
Keywords
sodium-ion batteries energy storage bismuth anodes nanoparticle@carbon composites

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