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Studies on Tubular MnO2-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Title
Studies on Tubular MnO2-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors
Authors
Jeong, Ji HwanLee, Hee-JoKim, Myung HwaKim, Bo-Hye
Ewha Authors
김명화
SCOPUS Author ID
김명화scopus
Issue Date
2021
Journal Title
ACS APPLIED ENERGY MATERIALS
ISSN
2574-0962JCR Link
Citation
ACS APPLIED ENERGY MATERIALS vol. 4, no. 10, pp. 10505 - 10513
Keywords
tubular nanostructureMnO2dual nozzleelectrospinningelectrochemical performance
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
The goal of this study is to design hollow carbon nanofibers containing MnO2 (PPMMn), in which the pores of the carbon nanofiber surface are utilized for ion diffusion to facilitate rapid MnO2 surface redox reactions. Electrochemical performance is optimized by controlling the growth of MnO2 on the inner or outer surfaces of carbon nanofibers by varying MnCl2 contents. Accessible specific surface areas and the hollow structure of PPMMn composites provide more active sites and internal spaces to enable electrolyte ion access. The energy storage capabilities of PPMMn in the assembled symmetrical supercapacitors provide excellent capacitive behavior with a maximum specific capacitance of 254 F g(-1), a maximum energy density of 32 Wh kg(-1), and long-term cycling stability (96% of the initial capacitance after 10,000 cycles). In addition, the cyclic voltammetry curves are nearly overlapped for the PPMMn electrode in a flat or bent state, and the PPMMn-based devices assembled in series successfully lit a commercial light-emitting diode. The study shows that PPMMn electrodes have excellent flexibilities and mechanical strengths and broad prospects in the energy storage field.
DOI
10.1021/acsaem.1c01381
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자연과학대학 > 화학·나노과학전공 > Journal papers
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