NDLI: A high performance flexible all solid state supercapacitor based on the MnO2 sphere coated macro/mesoporous Ni/C electrode and ionic conducting electrolyte.

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A high performance flexible all solid state supercapacitor based on the MnO2 sphere coated macro/mesoporous Ni/C electrode and ionic conducting electrolyte.

Content Provider	Semantic Scholar
Author	Zhi, Jian Reiser, Oliver Wang, Youfu Hu, Aiguo
Copyright Year	2016
Abstract	A high contact resistance between the active materials and the current collector, a low ionic conductivity of the gel electrolyte, and an impenetrable electrode structure are the three major barriers which greatly limit the capacitance of MnO2 in solid state supercapacitors. As a potential solution to these problems, in this work we report a novel electrode for solid state supercapacitors, based on a ternary system composed of hierarchical MnO2 spheres as the active material, macroporous Ni foam as gel penetrable skeletons and an ordered mesoporous carbon (OMC) membrane as the charge-transport accelerating layer. By employing butyl-3-methylimidazolium chloride (BMIMCl) modified gels as the ionic conducting electrolyte, the utilization efficiency of MnO2 on the specific capacitance was enhanced up to 88% of the theoretical value, delivering a volumetric capacitance of 81 F cm(-3), which is the highest value among MnO2 based solid state supercapacitors. Moreover, such a flexible device exhibits exceptional volumetric energy and power density (6.6 Wh L(-1) and 549 W L(-1), based on the whole device volume) combined with a small capacity loss of 8.5% after 6000 cycles under twisting. These encouraging findings unambiguously overcome the energy bottleneck of MnO2 in solid state supercapacitors, and open up a new application of macro/mesoporous materials in flexible devices.
File Format	PDF HTM / HTML
DOI	10.1039/c6nr02215d
PubMed reference number	27241801
Journal	Medline
Volume Number	8
Issue Number	23
Alternate Webpage(s)	http://www.rsc.org/suppdata/c6/nr/c6nr02215d/c6nr02215d1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c6nr02215d
Journal	Nanoscale
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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