Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries
Hierarchically porous hollow carbon spheres with an indented void structure have been designed as hosts for high-performance cathode materials for lithium-sulfur batteries. With a diameter of approximately 100 nm and a pore volume of 3.72 cm3 g-1, the hosts can retain sulfur within the porous struct...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
R S C Publications
2016
|
| Online Access: | http://hdl.handle.net/20.500.11937/8958 |
| _version_ | 1848745811499810816 |
|---|---|
| author | Zhong, Y. Wang, S. Sha, Y. Liu, M. Cai, R. Li, L. Shao, Zongping |
| author_facet | Zhong, Y. Wang, S. Sha, Y. Liu, M. Cai, R. Li, L. Shao, Zongping |
| author_sort | Zhong, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Hierarchically porous hollow carbon spheres with an indented void structure have been designed as hosts for high-performance cathode materials for lithium-sulfur batteries. With a diameter of approximately 100 nm and a pore volume of 3.72 cm3 g-1, the hosts can retain sulfur within the porous structures, including the external cone-like cavities, the porous carbon shells, and the inner linings. The exquisite indented structure provides excellent electron and Li-ion pathways while the symmetrically indented voids evenly alleviate the stress induced by the volume change during cycling. The oxygen functional groups further relieve the shuttle effect of polysulfide. A composite electrode with 52% sulfur loading demonstrates a remarkable initial discharge capacity of 1478 mA h g-1 at 1/10C (1C = 1675 mA g-1), corresponding to 88% sulfur utilization. Even when the sulfur/carbon (S/C) ratio of the composite is increased threefold from 1:1 to 3:1 (75% sulfur loading), a very high capacity retention is still maintained, achieving an ultraslow rate of capacity fading, ~0.047% per cycle over 1200 cycles at 1/2C. |
| first_indexed | 2025-11-14T06:23:17Z |
| format | Journal Article |
| id | curtin-20.500.11937-8958 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:23:17Z |
| publishDate | 2016 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-89582017-09-13T14:35:41Z Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries Zhong, Y. Wang, S. Sha, Y. Liu, M. Cai, R. Li, L. Shao, Zongping Hierarchically porous hollow carbon spheres with an indented void structure have been designed as hosts for high-performance cathode materials for lithium-sulfur batteries. With a diameter of approximately 100 nm and a pore volume of 3.72 cm3 g-1, the hosts can retain sulfur within the porous structures, including the external cone-like cavities, the porous carbon shells, and the inner linings. The exquisite indented structure provides excellent electron and Li-ion pathways while the symmetrically indented voids evenly alleviate the stress induced by the volume change during cycling. The oxygen functional groups further relieve the shuttle effect of polysulfide. A composite electrode with 52% sulfur loading demonstrates a remarkable initial discharge capacity of 1478 mA h g-1 at 1/10C (1C = 1675 mA g-1), corresponding to 88% sulfur utilization. Even when the sulfur/carbon (S/C) ratio of the composite is increased threefold from 1:1 to 3:1 (75% sulfur loading), a very high capacity retention is still maintained, achieving an ultraslow rate of capacity fading, ~0.047% per cycle over 1200 cycles at 1/2C. 2016 Journal Article http://hdl.handle.net/20.500.11937/8958 10.1039/c6ta03187k R S C Publications restricted |
| spellingShingle | Zhong, Y. Wang, S. Sha, Y. Liu, M. Cai, R. Li, L. Shao, Zongping Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title | Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title_full | Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title_fullStr | Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title_full_unstemmed | Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title_short | Trapping sulfur in hierarchically porous, hollow indented carbon spheres: A high-performance cathode for lithium-sulfur batteries |
| title_sort | trapping sulfur in hierarchically porous, hollow indented carbon spheres: a high-performance cathode for lithium-sulfur batteries |
| url | http://hdl.handle.net/20.500.11937/8958 |