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Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors

Title
Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors
Author
김선정
Keywords
CARBON NANOTUBE YARN; SOLID-STATE; FLEXIBLE SUPERCAPACITOR; MICRO-SUPERCAPACITOR; FIBERS; CAPACITOR; HYBRID
Issue Date
2018-09
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 8, Article no. 13309
Abstract
One-dimensional (1D) yarn or fiber-based supercapacitors that have small diameter, volume and high mechanical strength are needed due to the demands on power source for wearable electronics, micro-devices, and implantable medical devices. The composite sheath is fabricated on a commercially available CNT yarn substrate by alternating depositions of MnO2 and Ag layers. Synergistic effect of high loading level of pseudocapacitive MnO2 and reasonably improved rate-capability are achieved. In the composite sheath, the interconnected networks provide electrical contact between MnO2 aggregates and adjacent Ag layer. The conductive Ag inter layers shorten the solid-state charge diffusion length in the MnO2. Moreover, generated electrons during the charge/discharge process can be collected rapidly by the adjacent Ag layer, therefore, the great extents of MnO2 could be loaded onto the surface of CNT core fiber electrode without a significant rate-capability degradation. Due to the high MnO2 loading level, the composite sheath-core yarn supercapacitor showed excellent specific areal capacitance (322.2 mF/cm(2)) and according energy density (18.3 mu Wh/cm(2)).
URI
https://www.nature.com/articles/s41598-018-31611-2http://repository.hanyang.ac.kr/handle/20.500.11754/120048
ISSN
2045-2322
DOI
10.1038/s41598-018-31611-2
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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