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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11773

Title: Asymmetric Supercapacitors with High Energy Densities
Authors: Shi, Zijun
Chu, Wenjing
Hou, Yongdan
Gao, Yanfang
Yang, Nianjun
Keywords: Asymmetric Supercapacitors
high energy densities
Issue Date: 2019
Publisher: Nanoscale
Citation: Asymmetric Supercapacitors with High Energy Densities Z Shi, W Chu, Y Hou, Y Gao, N Yang - Nanoscale, 2019,11, 11946-11955
Abstract: The low energy densities of supercapacitors (SCs) are generally limited by the used anodes. To develop SCs with high energy densities, Fe3+ modified V2O5@GQDs (m-V2O5@GQDs) and ZIF-67-derived nanoporous carbon loaded with Mn3O4 (C/N-Mn3O4) were synthesized. After their detailed characterization using electron microscopy, X-ray methods and electrochemical techniques, they were further utilized as the anode and the cathode, respectively, to construct asymmetric supercapacitors (ASCs). The as-synthesized m-V2O5@GQDs improve the poor conductivity of V2O5, contributing greatly to a specific capacitance of 761 F g−1 at a current density of 2 A g−1. With application of a cell voltage of 2 V, an energy density of up to 99.4 W h kg−1 is achieved at a power density of 1000 W kg−1. Such ASCs also exhibit outstanding cycling performance (95% of initial capacitance even after 10 000 charging/discharging cycles). This study thus provides a new way to design and construct ASCs with high energy densities.
Description: Research Article
URI: http://hdl.handle.net/123456789/11773
Appears in Collections:College of Engineering

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