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Title: Preparation and electrochemical properties of polyaniline nanofibers using ultrasonication

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 deliversmore » 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}.« less
Authors:
 [1] ;  [2] ; ;  [3] ;  [2] ;  [1] ;  [4]
  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)
  4. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22420596
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 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)
Country of Publication:
United States
Language:
English
Subject:
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