Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 17, Pages 19836-19845Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c21645
Keywords
solid-liquid reaction; conformal transformation; MoO2/Sn/NC@NC; core-shell nanotube; lithium battery anode
Funding
- National Natural Science Foundation of China [51874357, 51872333]
- Innovative Research Group of Hunan Provincial Natural Science Foundation of China [2019JJ10006]
- 100 Talented program of Hunan Province
- Huxiang high-level talents program [2019RS1007]
- Shenghua Scholar Program of Central South University
- JSPS KAKENNHI [18H03869]
Ask authors/readers for more resources
The rational design of a hollow heterostructure promotes the development of highly durable anode materials for lithium-ion batteries. A newly synthesized carbon-confined MoO2/Sn/NC@NC heterostructured nanotubes show excellent capacities with hardly any attenuation and excellent long cycle life. These structures effectively alleviate volume fluctuation, provide more active sites, and improve lithium storage performance.
The rational design of a hollow heterostructure promotes the development of highly durable anode materials for lithium-ion batteries. Herein, carbon-confined MoO2/Sn/NC@NC heterostructured nanotubes evolving from MoO3 nanorods have been successfully synthesized for the first time. In the growth of the Mo/Sn precursor, a peculiar microstructure evolution occurs from solid rods to hollow tubes through a solid-liquid reaction. The MoO2/Sn composite is restricted within the double carbon layer after subsequent annealing and carbonization that distinctly inherits the morphology of the Mo/Sn precursor. The resulting electrode shows good capacities with hardly any attenuation (925.4 mA h g(-1) after 100 cycles at 100 mA g(-1)) and excellent long cycle life (620.1 mA h g(-1) after 1000 cycles at 2 A g(-1)). The MoO2/Sn/NC@NC nanotubes contain the synergistic effect, elaborate core-shell structure, large specific surface areas, and abundant voids. These superiorities not only provide beneficial channels for the electrolyte to fully come into contact with electrode materials and more active sites for redox reactions but also effectively alleviate the volume fluctuation and sustain the electrical connectivity to retain a stable solid-electrolyte interface layer, indeed, bringing about the prominent Li-storage performance. The present study paves a feasible avenue to prepare core-shell structures with high reversible capacity and long-term cycle performance for energy storage devices.
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