Double-Morphology CoS2 Anchored on N-Doped Multichannel Carbon Nanofibers as High-Performance Anode Materials for Na-Ion Batteries

Pan, Y, Cheng, X, Gong, L, Shi, L, Zhou, T, Deng, Y and Zhang, H 2018, 'Double-Morphology CoS2 Anchored on N-Doped Multichannel Carbon Nanofibers as High-Performance Anode Materials for Na-Ion Batteries', ACS Applied Materials & Interfaces, vol. 10, pp. 31441-31451.


Document type: Journal Article
Collection: Journal Articles

Title Double-Morphology CoS2 Anchored on N-Doped Multichannel Carbon Nanofibers as High-Performance Anode Materials for Na-Ion Batteries
Author(s) Pan, Y
Cheng, X
Gong, L
Shi, L
Zhou, T
Deng, Y
Zhang, H
Year 2018
Journal name ACS Applied Materials & Interfaces
Volume number 10
Start page 31441
End page 31451
Total pages 11
Publisher American Chemical Society
Abstract Na-ion batteries (NIBs) have attracted increasing attention given the fact that sodium is relatively more plentiful and affordable than lithium for sustainable and large-scale energy storage systems. However, the shortage of electrode materials with outstanding comprehensive properties has limited the practical implementations of NIBs. Among all the discovered anode materials, transition-metal sulfide has been proven as one of the most competitive and promising ones due to its excellent redox reversibility and relatively high theoretical capacity. In this study, double-morphology N-doped CoS2/multichannel carbon nanofibers composites (CoS2/MCNFs) are precisely designed, which overcome common issues such as the poor cycling life and inferior rate performance of CoS2 electrodes. The conductive 3D interconnected multichannel nanostructure of CoS2/MCNFs provides efficient buffer zones for the release of mechanical stresses from Na+ ions intercalation/deintercalation. The synergy of the diverse structural features enables a robust frame and a rapid electrochemical reaction in CoS2/MCNFs anode, resulting in an impressive long-term cycling life of 900 cycles with a capacity of 620 mAh g-1 at 1 A g-1 (86.4% theoretical capacity) and a surprisingly high-power output. The proposed design in this study provides a rational and novel thought for fabricating electrode materials.
Subject Construction Materials
Keyword(s) cobalt disulfide
transition-metal sulfide
carbon nanofibers
sodium ion batteries
carbon nanofibers
DOI - identifier 10.1021/acsami.8b11984
Copyright notice © 2018 American Chemical Society
ISSN 1944-8252
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