Co9S8 nanoparticles encapsulated in nitrogen-doped mesoporous carbon networks with improved lithium storage properties. Issue 38 (29th March 2016)

• Record Type: Journal Article
• Authors: Mujtaba, Jawayria; Sun, Hongyu; Huang, Guoyong; Zhao, Yanyan; Arandiyan, Hamidreza; Sun, Guoxing; Xu, Shengming; Zhu, Jing
• Is Part Of: RSC advances. Volume 6:Issue 38(2016)
• Page Start: 31775
• Page End: 31781
• Publication Date: 2016-03-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra03126a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Co9 S8 nanoparticles encapsulated in nitrogen-doped mesoporous carbon networks have been synthesized by annealing a cobalt containing metal organic framework with sulfur powders. The products exhibit excellent lithium storage properties. Abstract : We report the designed synthesis of unique Co9 S8 nanoparticles encapsulated in nitrogen-doped mesoporous carbon networks (Co9 S8 @NMCN nanocomposites). Uniform zeolitic imidazolate framework-67 was first synthesized and then transformed into Co9 S8 @NMCN nanocomposites by thermal annealing with sulfur powders in an Ar atmosphere. The structural and compositional analysis were conducted by employing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), which show that each Co9 S8 nanoparticle is well encapsulated in nitrogen-doped carbon layers. When evaluated as an anode material for LIBs, the as-prepared composite electrodes delivered superior capacity, excellent cycling stability and rate capability, which are attributed to the advantageous structural features.