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DOI	10.1039/c8ee00160j
	Two-dimensional siloxene nanosheets: Novel high-performance supercapacitor electrode materials
	Krishnamoorthy K.; Pazhamalai P.; Kim S.-J.
发表日期	2018
ISSN	17545692
起始页码	1595
结束页码	1602
卷号	11 期号:6
英文摘要	Silicon-based materials have attracted considerable interest for the development of energy storage devices because of their ease of integration with the existing silicon semiconductor technology. Herein, we have prepared siloxene sheets - a two-dimensional (2D) silicon material - and investigated their energy storage properties via fabrication of a symmetric supercapacitor (SSC) device containing 0.5 M tetraethylammonium tetrafluoroborate as the electrolyte. The formation of 2D siloxene sheets functionalized with oxygen, hydrogen, and hydroxyl groups was confirmed through X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and laser Raman mapping analyses. Cyclic voltammetric studies of the siloxene SSC device revealed the presence of pseudocapacitance in the siloxene sheets that arose from an intercalation/deintercalation phenomenon. The galvanostatic charge-discharge profiles of the device displayed sloped symmetric triangular curves with a maximum specific capacitance of 2.18 mF cm-2, high energy density of 9.82 mJ cm-2, good rate capability, and excellent cycling stability of 98% capacitance retention after 10000 cycles. The siloxene SSC device delivered a maximum power density of 272.5 mW cm-2, which is higher than those of other silicon- and carbon-based SSCs, highlighting their potential for application in energy storage. © 2018 The Royal Society of Chemistry.
英文关键词	Capacitance; Electrolytes; Energy storage; Polyacrylonitriles; Semiconducting silicon; Semiconductor device manufacture; Semiconductor devices; Storage (materials); Supercapacitor; X ray photoelectron spectroscopy; Energy storage properties; Galvanostatic charge discharges; Intercalation/deintercalation; Maximum power density; Silicon semiconductor technology; Silicon-based materials; Supercapacitor electrodes; Tetraethylammonium tetrafluoroborate; High resolution transmission electron microscopy; carbon; chemical analysis; electrical conductivity; electrode; electrolyte; energy storage; hydrogen; hydroxyl radical; oxygen
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190223
作者单位	Department of Mechatronics Engineering, Jeju National University, Jeju, 63243, South Korea; Department of Advanced Convergence Science and Technology, Jeju National University, Jeju, 63243, South Korea
推荐引用方式 GB/T 7714	Krishnamoorthy K.,Pazhamalai P.,Kim S.-J.. Two-dimensional siloxene nanosheets: Novel high-performance supercapacitor electrode materials[J],2018,11(6).
APA	Krishnamoorthy K.,Pazhamalai P.,&Kim S.-J..(2018).Two-dimensional siloxene nanosheets: Novel high-performance supercapacitor electrode materials.Energy & Environmental Science,11(6).
MLA	Krishnamoorthy K.,et al."Two-dimensional siloxene nanosheets: Novel high-performance supercapacitor electrode materials".Energy & Environmental Science 11.6(2018).