Journal article
Intercalation of cations into partially reduced molybdenum oxide for high-rate pseudocapacitors
Energy Storage Materials, v 1, pp 1-8
Nov 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Intercalation capacitance is emerging as a promising approach to increasing energy density of electrochemical capacitors. However, the number of materials capable of intercalating ions other than small H+ and Li+ is limited. Here we report a K+ preintercalated hydrogenated MoO3 (KyMoO3−x) with enhanced conductivity and widened interlayer gaps. Different cations (Mg2+, Na+, K+ and Li+) were able to intercalate along the (010) facet of KyMoO3−x with high intercalation capacitance (374F/cm3 at 0.5A/g in 5M LiCl). The cation intercalation behavior and the origin of the high capacitance have been systematically studied. Using artificial seawater as electrolyte, high volumetric capacitance (188F/cm3 at 0.5A/g) and good rate handling were also achieved. The KyMoO3−x electrode also showed a similar capacitance (196F/cm3 at 0.5A/g) and cycling performance (89% of initial capacitance maintained after 10,000 cycles) in natural seawater. When KyMoO3−x was fabricated into a symmetric pseudocapacitor with natural seawater as the electrolyte, the energy density and power density of the electrode reached 0.91mWh/cm3 and 6.5W/cm3, respectively. The impressive results indicate KyMoO3−x is a promising high-power handling pseudocapacitor electrode material.
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•A MoO3 derivative (KyMoO3−x) with enhanced conductivity and larger interlayer spacing is fabricated.•Different cations are capable of intercalating KyMoO3−x.•KyMoO3−x achieves a high volumetric capacitance, rate performance and cyclability in seawater electrolyte.
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Details
- Title
- Intercalation of cations into partially reduced molybdenum oxide for high-rate pseudocapacitors
- Creators
- Xu Xiao - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaChuanfang (John) Zhang - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, PR ChinaShizhe Lin - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaLiang Huang - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaZhimi Hu - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaYongliang Cheng - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaTianqi Li - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaWenming Qiao - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, PR ChinaDonghui Long - State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, PR ChinaYunhui Huang - School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, PR ChinaLiqiang Mai - State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Wuhan 430070, PR ChinaYury Gogotsi - Department of Materials Science and Engineering, and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USAJun Zhou - Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR China
- Publication Details
- Energy Storage Materials, v 1, pp 1-8
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000393519400002
- Scopus ID
- 2-s2.0-84945287747
- Other Identifier
- 991014970039004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology