Journal
ELECTROCHIMICA ACTA
Volume 256, Issue -, Pages 44-51Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.09.106
Keywords
Supercapacitors; Stretchable; MnO2; Buffer layer
Categories
Funding
- NSAF [U1230108]
- Fundamental Research Funds for the Central Universities (HUST) [2014NY010]
Ask authors/readers for more resources
Here, we report all-solid-state spiral wire-type stretchable supercapacitors (WSSCs) based on wire-type MnO2/graphene (Gr)/Ni electrode, in which a corroded Ni wire serves as substrate, Gr as buffer layer for depositing of MnO2 and KOH-polyvinyl alcohol gel as the solid-state electrolyte. Through interface engineering (surface corrosion and addition of buffer layer), interface contact, equivalent series resistance (ESR) and electrochemical performance of the wire-type electrode are greatly improved. The WSSC exhibits good electrochemical performance and stretchability. Linear (volumetric) specific capacitance of the spiral WSSC reaches 31.48 mF cm(-1) (0.45 F cm(-3)). Maximum linear energy density (power density) reaches 2.80 mu Wh cm(-1) (0.54 mW cm(-1)). The capacitance retention is about 92% after deformed at 100% tensile strain. Furthermore, the spiral WSSC has a smaller size and can be easily integrated with electrical wire in electric equipment as a backup power supply, which avoid damage of device or data as sudden power failure occurs. (C) 2017 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available