標題: Direct conversion of multilayer molybdenum trioxide to nanorods as multifunctional electrodes in lithium-ion batteries
作者: Ibrahem, Mohammed Aziz
Wu, Feng-Yu
Mengistie, Desalegn Alemu
Chang, Chia-Seng
Li, Lain-Jong
Chu, Chih Wei
光電工程學系
Department of Photonics
公開日期: 2014
摘要: In this study we prepared molybdenum trioxide (MoO3) nanorods having average lengths of 0.5-1.5 mu m and widths of approximately 100-200 nm through a one-step mechanical break-down process involving favorable fracturing along the crystal direction. We controlled the dimensions of the as-prepared nanorods by applying various imposing times (15-90 min). The nanorods prepared over a reaction time of 90 min were, on average, much shorter and narrower relative to those obtained over 30 min. Evaluations of lithium-ion storage properties revealed that the electrochemical performance of these nanorods was much better than that of bulk materials. As cathodes, the nanorods could deliver a high specific capacity (>315 mA h g(-1)) with losses of less than 2% in the first cycle at a rate of 30 mA g(-1); as anodes, the specific capacity was 800 mA h g(-1) at a rate of 50 mA g(-1). Relative to alpha-MoO3 microparticles, these nanorods displayed significantly enhanced lithium-ion storage properties with higher reversible capacities and better rate performance, presumably because their much shorter diffusion lengths and higher specific surface areas allowed more-efficient insertion/deinsertion of lithium ions during the charge/discharge process. Accordingly, enhanced physical and/or chemical properties can be obtained through appropriate nanostructuring of materials.
URI: http://hdl.handle.net/11536/24320
http://dx.doi.org/10.1039/c4nr00692e
ISSN: 2040-3364
DOI: 10.1039/c4nr00692e
期刊: NANOSCALE
Volume: 6
Issue: 10
起始頁: 5484
結束頁: 5490
顯示於類別:期刊論文


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  1. 000335148800063.pdf