Preparation and electrochemical properties of polyaniline nanofibers using ultrasonication

Journal Article · Wed Oct 15 00:00:00 EDT 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.04.058· OSTI ID:22420596

Manuel, James ^[1]; Kim, Miso ^[2]; Fapyane, Deby; Chang, In Seop ^[3]; Ahn, Hyo-Jun ^[2]; Ahn, Jou-Hyeon ^[1]

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1. Department of Chemical and Biological Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 900, Gajwa-dong, Jinju 660-701 (Korea, Republic of)
2. Department of Materials Engineering and Convergence Technology, Gyeongsang National University, 900, Gajwa-dong, Jinju 660-701 (Korea, Republic of)
3. School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan Gwagi-ro, Buk-gu, Gwangju 500-712 (Korea, Republic of)

Highlights: • Nanofibrous structured polyaniline (PANI) was prepared by simple ultrasonication. • PANI nanofibers prepared at 5 °C are uniform with an average diameter of 50 nm. • The conductivity is increased by 2 × 10{sup 8} times after doping with LiClO{sub 4}. • The cell with PANI-LiClO{sub 4} shows good cycle performance at high current densities. - Abstract: Polyaniline nanofibers have been successfully prepared by applying ultrasonic irradiation during oxidative polymerization of aniline in dilute hydrochloric acid and evaluated for suitability in lithium cells after doping with lithium perchlorate salt. Polyaniline nanofibers are confirmed by Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy, and transmission electron microscopy, and the efficiency of doping is confirmed by DC conductivity measurements at different temperatures. Electrochemical properties of nanofibers are evaluated, of which a remarkable increase in cycle stability is achieved when compared to polyaniline prepared by simple oxidative polymerization of aniline. The cell with nanofibrous polyaniline doped with LiClO{sub 4} delivers an initial discharge capacity value of 86 mA h g{sup −1} at 1 C-rate which is about 60% of theoretical capacity, and the capacity is slightly lowered during cycle and reaches 50% of theoretical capacity after 40 cycles. The cell delivers a stable and higher discharge capacity even at 2 C-rate compared to that of the cell prepared with bulk polyaniline doped with LiClO{sub 4}.

• OSTI ID: 22420596
• Journal Information: Materials Research Bulletin, Vol. 58; Conference: IFFM2013: International forum on functional materials, Jeju City (Korea, Republic of), 27-29 Jun 2013; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ANILINE
CAPACITY
COMPARATIVE EVALUATIONS
CURRENT DENSITY
DOPED MATERIALS
ELECTROCHEMISTRY
FOURIER TRANSFORMATION
HYDROCHLORIC ACID
INFRARED SPECTRA
IRRADIATION
LITHIUM PERCHLORATES
NANOFIBERS
OXIDATION
POLYMERIZATION
RAMAN SPECTROSCOPY
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY