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Specific capacitance-pore texture relationship of biogas slurry mesoporous carbon/MnO2 composite electrodes for supercapacitors

Title
Specific capacitance-pore texture relationship of biogas slurry mesoporous carbon/MnO2 composite electrodes for supercapacitors
Author
김희택
Keywords
Biogas slurry; Mesoporous carbon; Manganese oxide; Supercapacitors; Specific capacitance and composites
Issue Date
2019-02
Publisher
Elsevier BV
Citation
Nano-Structures and Nano-Objects, v. 17, Page. 21-33
Abstract
Here, we report synthesis of biogas slurry mesoporous carbon/MnO 2 composites by simple co-precipitation route followed by thermal treatment at 250 °C for 6 h. The texture, morphology, crystal structure, and microstructure of the composites are investigated by nitrogen sorption studies, FESEM, HRTEM, X-ray diffraction, and Raman spectroscopy. All samples exhibit type IV isotherms. The BET surface area decreased from 514 to 110 m2 g −1 while total pore volume decreased from 0.52 to 0.17 cm 3 g −1 for samples loaded with 2×10−5 and 2×10−3 moles of Mn. The electrodes fabricated exhibit high specific capacitance of 709 F g−1 at scan rate of 5 mV s−1. The specific capacitance at scan rate of 5 mV s−1 increases with increasing MnO2 content. However, at 50 mV s−1, specific capacitance decreases with increasing MnO2 content. Varying the MnO2 content and hence the textural parameters, strongly influences the specific capacitances of the composite electrodes.
URI
https://www.sciencedirect.com/science/article/pii/S2352507X18302397https://repository.hanyang.ac.kr/handle/20.500.11754/121722
ISSN
2352-507X
DOI
10.1016/j.nanoso.2018.10.002
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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