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Graphite-Nanoplate-Coated Bi2S3 Composite with High-Volume Energy Density and Excellent Cycle Life for Room-Temperature Sodium-Sulfide Batteries.
- Source :
-
Chemistry - A European Journal . Jan2016, Vol. 22 Issue 2, p590-597. 8p. - Publication Year :
- 2016
-
Abstract
- 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 mAh g−1 and high stable specific energy in the range of 275-300 Wh kg−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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ENERGY density
*STORAGE batteries
*BISMUTH compounds
*SODIUM compounds
*SULFIDES
Subjects
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 22
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 112066249
- Full Text :
- https://doi.org/10.1002/chem.201503310