Synthesis of a porous sheet-like V₂O₅-CNT nanocomposite using an ice-templating 'bricks-and-mortar' assembly approach as a high-capacity, long cyclelife cathode material for lithium-ion batteries
Data(s) |
01/01/2016
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Resumo |
Tailoring the nanostructures of electrode materials is an effective way to enhance their electrochemical performance for energy storage. Herein, an ice-templating "bricks-and-mortar" assembly approach is reported to make ribbon-like V2O5 nanoparticles and CNTs integrated into a two-dimensional (2D) porous sheet-like V2O5-CNT nanocomposite. The obtained sheet-like V2O5-CNT nanocomposite possesses unique structural characteristics, including a hierarchical porous structure, 2D morphology, large specific surface area and internal conducting networks, which lead to superior electrochemical performances in terms of long-term cyclability and significantly enhanced rate capability when used as a cathode material for LIBs. The sheet-like V2O5-CNT nanocomposite can charge/discharge at high rates of 5C, 10C and 20C, with discharge capacities of approximately 240 mA h g-1, 180 mA h g-1, and 160 mA h g-1, respectively. It also retains 71% of the initial discharge capacity after 300 cycles at a high rate of 5C, with only 0.097% capacity loss per cycle. The rate capability and cycling performance of the sheet-like V2O5-CNT nanocomposite are significantly better than those of commercial V2O5 and most of the reported V2O5 nanocomposite. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Royal Society of Chemistry |
Relação |
FT130100380 http://dro.deakin.edu.au/eserv/DU:30083894/razal-synthesisporoussheet-2016.pdf http://www.dx.doi.org/10.1039/c5ta10414a |
Direitos |
2016, Royal Society of Chemistry |
Palavras-Chave | #Nanostructures #Energy storage #Materials chemistry #Science & Technology #Physical Sciences #Technology #Chemistry, Physical #Energy & Fuels #Materials Science, Multidisciplinary #Chemistry #Materials Science #ELECTROCHEMICAL ENERGY-STORAGE #HIGH-PERFORMANCE #HOLLOW MICROSPHERES #HIGH-POWER #ONE-POT #CAPABILITY #ELECTRODES #COMPOSITE #GELS #INTERCALATION |
Tipo |
Journal Article |