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A Phase‐Separation Route to Synthesize Porous CNTs with Excellent Stability for Na + Storage
Author(s) -
Chen Zhi,
Wang Taihong,
Zhang Ming,
Cao Guozhong
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201604045
Subject(s) - materials science , porosity , electrospinning , carbon nanotube , chemical engineering , nanofiber , anode , nanoparticle , specific surface area , catalysis , phase (matter) , nanotechnology , electrode , composite material , organic chemistry , polymer , chemistry , engineering
Porous carbon nanotubes (CNTs) are obtained by removing MoO 2 nanoparticles from MoO 2 @C core@shell nanofibers which are synthesized by phase‐segregation via a single‐needle electrospinning method. The specific surface area of porous CNTs is 502.9 m 2 g −1 , and many oxygen‐containing functional groups (COH, CO) are present. As anodes for sodium‐ion batteries, the porous CNT electrode displays excellent rate performance and cycling stability (110 mA h g −1 after 1200 cycles at 5 A g −1 ). Those high properties can be attributed to the porous structure and surface modification to steadily store Na + with high capacity. The work provides a facile and broadly applicable way to fabricate the porous CNTs and their composites for batteries, catalysts, and fuel cells.