Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 28, Issue 2, Pages 205-211Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2018.01.018
Keywords
Sodium-ion battery; Antimony; Sodium alginate; Liquid-phase reduction; Carbon coating
Funding
- National Natural Science Foundation of China [51772209, 51472180]
- High Technology Research and Development Program of China (863 Program) [2015AA034702]
- Higher School Science and Technology Development Project of Tianjin City [20140310]
- Tianjin Normal University [52XC1410]
- Australian Research Council under the Discovery Early Career Researcher Award (DECRA) scheme [DE170100871]
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The poor cycling stability of antimony during a repeated sodium ion insertion and desertion process is the key issue, which leads to an unsatisfactory application as an anode material in a sodium-ion battery. Addressed at this, we report a facile two-step method to coat antimony nanoparticles with an ultrathin carbon layer of few nanometers (denoted Sb@C NPs) for sodium-ion battery anode application. This carbon layer could buffer the volume change of antimony in the charge-discharge process and improve the battery cycle performance. Meanwhile, this carbon coating could also enhance the interfacial stability by firmly connecting the sodium alginate binders through its oxygen-rich surface. Benefitted from these advantages, an improved initial discharge capacity (788.5 mA h g(-1)) and cycling stability capacity (553 mA h g(-1) after 50 times cycle) have been obtained in a battery using Sb@C NPs as anode materials at 50 mA g(-1).
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