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Improved performance of Li–Se battery based on a novel dual functional CNTs@graphene/CNTs cathode construction
- Source :
- Rare Metals. 36:425-433
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- A dual functional CNTs@graphene/CNTs cathode for Li–Se battery was constructed by a CNTs@graphene network and a CNTs interlayer. CNTs were first integrated with graphene to form a three-dimensional (3D) framework and work together as a conductive matrix for Se confinement. The optimized composite cathode delivers a high initial capacity of 575 mAh·g−1 at 0.5 A·g−1 and good rate capacity with a retained capacity of 479 mAh·g−1 at 2.0 A·g−1 (73% of the capacity at 0.2 A·g−1). CNTs were further served as an interlayer to confine the diffusion of polyselenides by constructing a thin CNTs layer outside the CNTs@graphene network. An improved initial capacity of 616 mAh·g−1 at 0.5 A·g−1 is achieved with a retained capacity of 538 mAh·g−1 after 80 cycles, indicating the effective dual function of CNTs in this novel cathode construction and great application potential for Li–Se battery.
- Subjects :
- Battery (electricity)
Materials science
Graphene
Diffusion
Metals and Alloys
02 engineering and technology
Carbon nanotube
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Cathode
0104 chemical sciences
law.invention
Improved performance
law
Materials Chemistry
Physical and Theoretical Chemistry
Composite material
0210 nano-technology
Electrical conductor
Layer (electronics)
Subjects
Details
- ISSN :
- 18677185 and 10010521
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- Rare Metals
- Accession number :
- edsair.doi...........fd4c328568178edfd184ddb28edf4cbb