A Phase‐Separation Route to Synthesize Porous CNTs with Excellent Stability for Na+ Storage |
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| Authors: | Zhi Chen Taihong Wang Ming Zhang Guozhong Cao |
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| Affiliation: | 1. Key Laboratory for Micro‐Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, China;2. Department of Materials Science & Engineering, University of Washington, Seattle, WA, USA |
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| Abstract: | Porous carbon nanotubes (CNTs) are obtained by removing MoO2 nanoparticles 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 m2 g?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?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. |
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| Keywords: | disordered structure oxygen‐containing functional groups phase‐separation porous carbon nanotubes (CNTs) sodium‐ion battery |
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