Journal article
Ethanol reduced molybdenum trioxide for Li-ion capacitors
Nano energy, Vol.26, pp.100-107
Aug 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Orthorhombic molybdenum trioxide (α-MoO3) is a layered oxide with promising performance as electrode material for Li-ion capacitors. In this study, we show that expansion of the interlayer spacing (by ~0.32Å) of the structure along the b-axis, introduced by partial reduction of α-MoO3 and formation of MoO3−x (x=0.06–0.43), results in enhanced diffusion of Li ions. Binder-free hybrid electrodes made of MoO3−x nanobelts and carbon nanotubes show excellent electrical conductivity. The combination of increased interlayer spacing and enhanced electron transport leads to high gravimetric and volumetric capacitances of about 420F/g or F/cm3 and excellent cycle life of binder-free MoO3−x electrodes.
Li-ion capacitors electrodes based on the expanded molybdenum trioxide (MoO3) and carbon nanotubes (CNTs) are reported. Owing to the high ion diffusion rate and good electron transport, the electrode shows 418F/g capacitance in the 2V window. Moreover, the network of CNTs and MoO3 nanobelts exhibits excellent cycle life in organic electrolyte.
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•Partial reduction of MoO3 in ethanol results in its increased interlayer spacing.•Binder-free electrodes are fabricated and compared to traditional electrodes.•The electrodes showed excellent cyclic performance (92% capacitance after 5000).•The capacitance of reduced electrodes is higher than previously reported values.
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Details
- Title
- Ethanol reduced molybdenum trioxide for Li-ion capacitors
- Creators
- Tianqi Li - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaMajid Beidaghi - Department of Materials Engineering, Auburn University, 275 Wilmore Labs, Auburn, Al 36849, USAXu Xiao - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaLiang Huang - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaZhimi Hu - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaWanmei Sun - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaXun Chen - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaYury Gogotsi - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USAJun Zhou - Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
- Publication Details
- Nano energy, Vol.26, pp.100-107
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991014970026304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied