A Phase-Separation Route to Synthesize Porous CNTs with Excellent Stability for Na+Storage.
Porous carbon nanotubes (CNTs) are obtained by removing MoO2nanoparticles from MoO2@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 m2g-1, and many oxygen-containing functional groups (COH, CO) are present. As anodes for sodium-ion batteries, the porous CNT electrode displays excellent rate performance and cycling stability (110 mA h g-1after 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.
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.
Zhi
Z
Chen
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.
Taihong
T
Wang
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.
Ming
M
Zhang
Department of Materials Science & Engineering, University of Washington, Seattle, WA, 98195, USA.
Guozhong
G
Cao
disordered structure; oxygen-containing functional groups; phase-separation; porous carbon nanotubes (CNTs); sodium-ion battery