期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 23, 页码 11772-11780出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta00369b
关键词
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资金
- Department of Education GAANN Fellowship under PR Award [P200A150105]
A low-temperature modified vapour-phase synthesis allows for the deposition of high aspect ratio, conductive and capacitive one-dimensional nanostructures of the conducting polymer polypyrrole onto three-dimensional fibrous substrates. Nanofibrillar polypyrrole resembling nanobrushes can be deposited at temperatures as low as 50 degrees C without the use of hard templates. When deposited on a conductive substrate such as hard carbon paper, the nanofibers exhibit a three-electrode specific capacitance of 144.7 F g(-1) over a 1.2 V window in 1 M lithium perchlorate with good reversibility. Two electrode electrochemical capacitors fabricated using polypyrrole on hard carbon paper exhibit a specific energy ranging from 7 to 13 W h kg(-1) based on average electrode active mass with a maximum charging voltage between 0.6 and 1 V. Furthermore, the devices can undergo 200 000 cycles while retaining 70% of their initial capacitance when charged to 0.6 V. This work represents a significant advance in the synthesis of nanostructured polypyrrole from the vapor phase.
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