Discipline: Technology and Engineering
Subcategory: Materials Science
Julien Niyogushima - Norfolk State University
Co-Author(s): Sangram K Pradhan ( Norfolk State University); Messaoud Bahoura ( Norfolk State University).
Highly demand of energy storage devices has boosted researchers for fabricating ultra-efficient supercapacitor with very large energy density and long cycling stability. CeO2 nanofibers are one of the most promising materials for its superior oxidation performance as well specific capacitance to hold more charge is highly dependent on the extend of its Ce4+/Ce3+ redox cycle, shape, and surface structure. However, in reality metal oxide is low conductor which hinders the performance of the device. We adopted a smart approach to improve the charge storing capability of the device by making a hybrid composite structure with conducting porous carbon and long chain polymers through a simple, efficient and low temperature based hydrothermal synthesis route. This approach favors not only to store the charge as an electrode via electrochemically but also through pseudo-capacitive effect from CeO2 nanofibers. The structure and morphology of CeO2 nanofibers were characterized by X-ray Diffraction and field emission scanning electron microscopy (FESEM). FESEM showed that highly dense CeO2 nanofibers were less than 30 nm in diameter. Electrochemical measurement of CeO2 nanofibers hybrid composite shows improved specific capacitance value with will very large cycling stability.Not Submitted
Funder Acknowledgement(s): This work is supported by the NSF-CREST Grant number HRD 1547771 and NSF-CREST Grant number HRD 1036494.
Faculty Advisor: Dr. Sangram K Pradhan, firstname.lastname@example.org
Role: Synthesize and characterized of CeO2 nanofibers