skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synthesis and Characterization of Bicontinuous Cubic poly(3,4-ethylene dioxythiophene) Gyroid (PEDOT GYR) Gels

; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1463-9076
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 17
Country of Publication:
United States

Citation Formats

Cho, W, Wu, J, Shim, B, Kuan, W, Mastroianni, S, Young, W, Kuo, C, III, T Epps, and Martin, D. Synthesis and Characterization of Bicontinuous Cubic poly(3,4-ethylene dioxythiophene) Gyroid (PEDOT GYR) Gels. United States: N. p., 2015. Web. doi:10.1039/C4CP04426F.
Cho, W, Wu, J, Shim, B, Kuan, W, Mastroianni, S, Young, W, Kuo, C, III, T Epps, & Martin, D. Synthesis and Characterization of Bicontinuous Cubic poly(3,4-ethylene dioxythiophene) Gyroid (PEDOT GYR) Gels. United States. doi:10.1039/C4CP04426F.
Cho, W, Wu, J, Shim, B, Kuan, W, Mastroianni, S, Young, W, Kuo, C, III, T Epps, and Martin, D. 2015. "Synthesis and Characterization of Bicontinuous Cubic poly(3,4-ethylene dioxythiophene) Gyroid (PEDOT GYR) Gels". United States. doi:10.1039/C4CP04426F.
title = {Synthesis and Characterization of Bicontinuous Cubic poly(3,4-ethylene dioxythiophene) Gyroid (PEDOT GYR) Gels},
author = {Cho, W and Wu, J and Shim, B and Kuan, W and Mastroianni, S and Young, W and Kuo, C and III, T Epps and Martin, D},
abstractNote = {},
doi = {10.1039/C4CP04426F},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
number = ,
volume = 17,
place = {United States},
year = 2015,
month = 1
  • We report the synthesis of composite RuO 2/poly(3,4-ethylenedioxythiophene) (PEDOT) nanotubes with high specific capacitance and fast charging/discharging capability as well as their potential application as electrode materials for a high-energy and high-power supercapacitor. RuO 2/PEDOT nanotubes were synthesized in a porous alumina membrane by a step-wise electrochemical deposition method, and their structures were characterized using electron microscopy. Cyclic voltammetry was used to qualitatively characterize the capacitive properties of the composite RuO 2/PEDOT nanotubes. Their specific capacitance, energy density and power density were evaluated by galvanostatic charge/discharge cycles at various current densities. The pseudocapacitance behavior of these composite nanotubes originates frommore » ion diffusion during the simultaneous and parallel redox processes of RuO 2 and PEDOT. We show that the energy density (specific capacitance) of PEDOT nanotubes can be remarkably enhanced by electrodepositing RuO 2 into their porous walls and onto their rough internal surfaces. The flexible PEDOT prevents the RuO 2 from breaking and detaching from the current collector while the rigid RuO 2 keeps the PEDOT nanotubes from collapsing and aggregating. The composite RuO 2/PEDOT nanotube can reach a high power density of 20 kW kg -1 while maintaining 80% energy density (28 Wh kg -1) of its maximum value. This high power capability is attributed to the fast charge/discharge of nanotubular structures: hollow nanotubes allow counter-ions to readily penetrate into the composite material and access their internal surfaces, while a thin wall provides a short diffusion distance to facilitate ion transport. The high energy density originates from the RuO 2, which can store high electrical/electrochemical energy intrinsically. The high specific capacitance (1217 Fg -1) which is contributed by the RuO 2 in the composite RuO 2/PEDOT nanotube is realized because of the high specific surface area of the nanotubular structures. Such PEDOT/RuO 2 composite nanotube materials are an ideal candidate for the development of high-energy and high-power supercapacitors.« less
  • Organosulfur Compounds (OSCs) represent an attractive alternative as organic cathode materials for electrochemical energy storage (EES) applications. They intrinsically have high gravimetric capacity (although low volumetric) and are typically inexpensive, since they are composed of abundant elements (i.e. C, N, O, and S). However, OSCs, specifically thiolate-containing OSCs generally suffer from slow charge transfer kinetics. To mitigate the charge transfer limitations, conducting polymers (CPs) such as poly-3,4-ethylenedioxythiophene (PEDOT) have been employed as electrocatalysts. In this manuscript, we have covalently modified a PEDOT film with an OSC (i.e. 2,5-dimercapto-1,3,4-thiadiazole di-lithium salt (Li2DMcT)). We have developed a synthetic strategy that employs, formore » the first time, a post-polymerization modification reaction as a tractable and viable technique to modify organic materials for EES electrodes. Electrochemical characterization, via cyclic voltammetry showed the expected pseudocapacitive response of PEDOT with the superimposed faradaic processes of the covalently bound DMcT. Moreover, spectroscopic characterization using Raman spectroscopy provided mechanistic insights into the electrochemical reactions. Furthermore, we electropolymerized films onto coin-cell electrodes and tested them in half-cell configurations and found that the capacity retention of the films was significantly enhanced, when compared with the PEDOT/DMcT composites (mixed but not covalently bound).« less
  • We report the observation of a cubic phase consistent with the double gyroid structure in strongly segregated diblock copolymers of PS-b-PDMS over a volume fraction ({phi}{sub PDMS}) range of {approx}0.39 to 0.45. The samples have respective molecular weights of 127 kg/mol and 73 kg/mol and degree of segregation N{sub {chi}} equal to 187 and 106, respectively, at annealing temperature of 130 C. It is important to highlight that two out of the total four samples investigated, exhibited hexagonally close packed cylindrical domains of PDMS and alternating lamellae at {phi}{sub PDMS} = 0.39 and 0.45, respectively, indicating the possible narrow rangemore » of the DG morphology for the specific diblock copolymers.« less
  • Various lipid-water systems, such as vesicles and microemulsions, have been used to produce nanoscale metal particles. These particles have potential applications in catalysis, micro- and nanoelectronics, magnetic recording, and optics depending on the metal and on the size and distribution of the formed particles. In this communication, we demonstrate for the first time the possibility of utilizing the bicontinuous cubic-phase structure of a lipid-water system to produce controlled-size metal nanoparticles with minimal polydispersity. The results show that the narrow aqueous channels of the bicontinuous cubic phase constrain the size of the metal particles, and therefore the cubic phase could providemore » a viable matrix for the synthesis of nanoscale materials. We have utilized a polyol-type process to reduce the palladium ions to metallic palladium. 9 refs., 2 figs.« less
  • We report the synthesis of a series of water-soluble, fluorescent, conjugated polymers via the Gilch reaction with an overall yield greater than 40%. The yield for the Gilch reaction decreases with the increase in the length of the side chain (ethylene glycol), presumably due to the steric effects inhibiting the linking of monomeric units. The hydrophilic side chain enhances the solubility of the polymer in water and concomitantly leads to a side-chain-dependent conformation and solvent-dependent quantum efficiency. An increase in the ethylene glycol repeat units on the polymer side chain structure results in changes in chain packing, hence the crystallinitymore » evolves from semicrystalline to liquid crystalline to completely amorphous. An increased in the length of the side chain also leads to changes in the polymer-solvent interaction that changes the electronic structure as manifested in the photophysical properties of these polymers. These novel polymers exhibit two glass transition temperatures, which can be readily rationalized by differences in microstructure when casted from hydrophobic and hydrophilic solvents. Cyclic voltammograms of polymer 1d-3d suggests two-electron transfer, as compare to P1 which has one complete redox pair. The potential of having a nanoscaled domain structure and stabilizing two electrons on a polymer chains signifies the potential of these polymers in fabricating electronic and photovoltaic devices.« less