Journal
ADVANCED ENERGY MATERIALS
Volume 9, Issue 39, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201901778
Keywords
BCN nanotubes; encapsulation; energy storage; sodium ion batteries; trogtalite selenide
Categories
Funding
- National Natural Science Foundation of China [51825201]
- National Key Research and Development Program of China [2017YFA0206701]
- National Program for Support of Top-notch Young Professionals
- Changjiang Scholar Program
Ask authors/readers for more resources
Trogtalite CoSe2 nanobuds encapsulated into boron and nitrogen codoped graphene (BCN) nanotubes (CoSe2@BCN-750) are synthesized via a concurrent thermal decomposition and selenization processes. The CoSe2@BCN-750 nanotubes deliver an excellent storage capacity of 580 mA h g(-1) at current density of 100 mA g(-1) at 100th cycle, as the anode of a sodium ion battery. The CoSe2@BCN-750 nanotubes exhibit a significant rate capability (100-2000 mA g(-1) current density) and high stability (almost 98% storage retention after 4000 cycles at large current density of 8000 mA g(-1)). The reasons for these excellent storage properties are illuminated by theoretical calculations of the relevant models, and various possible Na+ ion storage sites are identified through first-principles calculations. These results demonstrate that the insertion of heteroatoms, B-C, N-C as well as CoSe2, into BCN tubes, enables the observed excellent adsorption energy of Na+ ions in high energy storage devices, which supports the experimental results.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available