Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 2, Pages 590-597Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503310
Keywords
batteries; bismuth; carbon; composite materials; sodium; sulfur
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Funding
- Australian Research Council [LP120200432]
- Carbon valley construction program through the Ministry of Trade, Industry Energy (MOTIE)
- Korea Institute for Advancement of Technology (KIAT) [R0003399]
- Australian Research Council [LP120200432] Funding Source: Australian Research Council
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Graphite-nanoplate-coated Bi2S3 composite (Bi2S3@C) has been prepared by a simple, scalable, and energy-efficient precipitation method combined with ball milling. The Bi2S3@C composite was used as the cathode material for sodium-sulfide batteries. It delivered an initial capacity of 550 mAhg(-1) and high stable specific energy in the range of 275-300 Whkg-1 at 0.1 C, with an enhanced capacity retention of 69% over 100 cycles. The unique structure demonstrates superior cycling stability, with a capacity drop of 0.3% per cycle over 100 cycles, compared with that of bare Bi2S3. The sodium storage mechanism of Bi2S3 was investigated based on ex situ X-ray diffraction and scanning transmission electron microscopy.
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