Journal
ELECTROCHIMICA ACTA
Volume 307, Issue -, Pages 341-350Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.03.230
Keywords
Supercapacitors; Hierarchical; Nanostructures; High capacitance; Flexible electrode
Categories
Funding
- National Nature Science Foundation of China [21876008, 21575011]
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In this paper, hierarchical Co3O4-SnO@SnO2 nanostructures flexible supercapacitor electrodes were fabricated by hydrothermal routine. Owing to the introduction of Co3O4 as well as a cleverly PN junction hierarchically skeleton, the Co3O4-SnO@SnO2 electrode presents a structure of nanospheres covered by nanoparticles, offering a low internal resistance (0.6 Omega) and high electrical conductivity. Without the use of a binder and complicated manufacturing process, the hierarchical nanostructures can be directly used as the working electrode in the three-electrode system. In addition, the electrode demonstrates a high specific capacitance (1.056 F cm(-2) at 1 mA cm(-2)) and excellent stability (only 8.5% was lost in initial specific capacitance at 1 mA cm(-2) after 2000 cycles). Therefore, the hierarchical Co3O4-SnO@SnO2 nanostructures provide an opportunity for the coordinated development of novel energy density and power density of supercapacitor. (C) 2019 Elsevier Ltd. All rights reserved.
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