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Effects of Surface Oxygenic Functional Groups on the Electrochemical Properties of Supercapacitor
Du, Xuan; Ma, Shuhui; Zhao, Wei; Qi, Tao; Hua, Chao; Wang, Yi

The surface oxygenic functional groups are significant to the capacity and cycle stability of supercapacitor. Coconut shell-based activated carbon (CS) with high surface oxygen content was used as starting material and reduced by hydrogen. The measurement results of microstructure showed that the specific surface area and total pore volume increased a little. While the surface oxygen content decreased greatly according to the results of X-ray photoelectron spectroscopy (XPS). Electrochemical behaviors of the electrode built with CS and hydrogen reduced CS (HCS) were investigated in two kinds of electrolytes, 6 mol L-1 KOH and 1 mol L-1 Et4NBF4/PC, respectively. The results showed that the surface oxygen groups have little influence to the electrochemical properties of supercapacitor in KOH electrolyte. As for supercapacitor in Et4NBF4/PC, HCS presents higher specific capacitance, higher energy density, better capacity retention and lower leakage current than those of original CS. This indicates that the surface oxygenic functional groups have reaction and impediment to the organic electrolyte. The study not only provides a simple and effective method for large-scale and safe application of supercapacitors using organic electrolyte, but also offers a better understanding of the action of surface functional groups on the electrochemical performances of porous carbon materials.

KeywordSupercapacitor Surface Oxygenic Functional Groups Reduction Electrochemical Properties Leakage Current
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS KeywordIonic-liquid Electrolyte ; Double-layer Capacitors ; Carbon ; Performance ; Behavior ; Edlcs
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationNational Natural Science Foundation of China(51302264) ; One Hundred Talent Program of Chinese Academy of Science ; National Science Foundation for Distinguished Young Scholars of China(51125018)
WOS IDWOS:000402483900011
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationChinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Du, Xuan,Ma, Shuhui,Zhao, Wei,et al. Effects of Surface Oxygenic Functional Groups on the Electrochemical Properties of Supercapacitor[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2017,17(6):3729-3734.
APA Du, Xuan,Ma, Shuhui,Zhao, Wei,Qi, Tao,Hua, Chao,&Wang, Yi.(2017).Effects of Surface Oxygenic Functional Groups on the Electrochemical Properties of Supercapacitor.JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,17(6),3729-3734.
MLA Du, Xuan,et al."Effects of Surface Oxygenic Functional Groups on the Electrochemical Properties of Supercapacitor".JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 17.6(2017):3729-3734.
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