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.
Reference Key
xiong2019bismuthadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Xiong, Peixun;Bai, Panxing;Li, Ang;Li, Benfang;Cheng, Mingren;Chen, Yiping;Huang, Shuping;Jiang, Qiang;Bu, Xian-He;Xu, Yunhua;
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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