Cobalt oxide nanoparticle embedded N-CNTs: lithium ion battery applications. Issue 2 (4th January 2016)

• Record Type: Journal Article
• Authors: Khan, I. A.; Nasim, F.; Choucair, M.; Ullah, S.; Badshah, A.; Nadeem, M. A.
• Is Part Of: RSC advances. Volume 6:Issue 2(2016)
• Page Start: 1129
• Page End: 1135
• Publication Date: 2016-01-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23222h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : ZIF-12 is converted to Co/N-CNTs at 950 °C under an argon atmosphere. The obtained hybrid nanocomposite is used for LIBs application as an anode material with superior charge storage performance. Abstract : Cobalt oxide embedded nitrogen-doped carbon nanotubes (CoO/N-CNT) are synthesized by the direct carbonization of a cobalt–benzimidazole framework (ZIF-12) at 950 °C under an inert atmosphere. X-ray photoelectron spectroscopy indicates the conducting graphitic networks of the CNT contain edge and aromatic substituted pyridinic-nitrogen. Microscopy reveals the extensive formation of multi-walled CNT encasing CoO nanoparticles. This trapping of CoO nanoparticles within the nitrogen doped CNT network is discussed as the key basis of improving the material's contact resistance and conductivity to achieve high power outputs, together with the high specific surface area (365 m 2 g −1 ) and structural robustness of the novel composite material. The material shows an excellent lithium charge/discharge and storage, retaining ∼95% capacity after 50 cycles and a reversible capacity of ∼1100 mA h g −1 at a current density of 0.1 A g −1, which far exceeds the performance of conventional lithium ion battery anode materials under similar conditions.