27 March 2015 High-performance porous carbon/CeO2 nanoparticles hybrid super-capacitors for energy storage
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Abstract
Increasing demand for energy storage devices has propelled researchers for developing efficient super-capacitors (SC) with long cycle life and ultrahigh energy density. Carbon-based materials are commonly used as electrode materials for SC. Herein we report a new approach to improve the SC performance utilizing porous carbon /Cerium oxide nanoparticle (PC-CON) hybrid as electrode material synthesized via low temperature hydrothermal method and tetraethyl ammonium tetrafluroborate in acetonitrile as organic electrolyte. Through this approach, charges can be stored not only via electrochemical double layer capacitance (EDLC) from PC but also through pseudo-capacitive effect from CeO2 NPs. The excellent electrode-electrolyte interaction due to the electrochemical properties of the ionic electrolyte provides a better voltage window for the SC. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-Ray Diffraction (XRD) measurements were used for the initial characterization of this PC/CeO2 NPs hybrid material system. Electrochemical measurements of SCs was performed using a potentio-galvanostat. It is found that the specific capacitance was improved by 30% using PC-CON system compared with pristine PC system.
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Mohammad Arif Ishtiaque Shuvo, Hasanul Karim, Md. Tariqul Islam, Gerardo Rodriguez, Manjula I. Nandasiri, Ashleigh M. Schwarz, Arun Devaraj, Juan C. Noveron, Murugesan Vijayakumar, Yirong Lin, "High-performance porous carbon/CeO2 nanoparticles hybrid super-capacitors for energy storage", Proc. SPIE 9439, Smart Materials and Nondestructive Evaluation for Energy Systems 2015, 94390H (27 March 2015); doi: 10.1117/12.2084267; https://doi.org/10.1117/12.2084267
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