Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 6, Pages 7297-7307Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c21447
Keywords
hollow nanocube; iron nitride; air stability; flexible anode; high rate property
Funding
- Innovation Foundation of Graduate Student of Harbin Normal University [HSDBSCX2020-13]
- Natural Science Foundation of Heilongjiang Province of China [JJ2020TD0027]
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This study introduces a new method using core-shell hybrid fibers filled with metal nitride as a self-supporting anode for batteries, providing high stability in both lithium-ion and sodium-ion batteries. The approach shows potential for improving battery performance and offers new insights into the fabrication of efficient structures for functional materials.
Poor air stability and severe structure pulverization are crucial issues for metal nitrides in metal-ion batteries. Herein, core-shell hybrid fibers (CSHN fiber) filled with metal nitride@C hollow nanocubes are introduced to be a new self-supporting anode for sodium-ion and lithium-ion batteries. The hierarchical carbon network provides fast electronic pathways and gives high protection for iron nitrides. Meanwhile, the self-supporting electrode avoids the complicated electrode fabrication process and decreases the opportunity to air exposure. Moreover, its porous nature ensures high buffer to volumetric expansion and improves the cycling stability. Therefore, it is a good platform to realize fast kinetics and high durability. For the first time, Fe2N@N-doped carbon CSHN hybrid fibers are constructed. Their influences on air stability and electrochemical behaviors are studied. Impressively, they achieve high stabilities in both lithium-ion (92.8%, at 5 A g(-1), 1000 cycles) and sodium-ion (95.6%, at 2 A g(-1), 2000 cycles) batteries. Therefore, this work introduces a new method to construct superior performance nitride anodes. Moreover, it also provides a new insight on the fabrication of highly efficient structures for diverse functional materials.
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