We report for the first time highly conductive poly（3,4-ethylenedioxythiophene）： poly（4-styrenesulfonate） （PEDOT：PSS）/graphene composites fabricated by in situ polymerization and their applications in a thermo...We report for the first time highly conductive poly（3,4-ethylenedioxythiophene）： poly（4-styrenesulfonate） （PEDOT：PSS）/graphene composites fabricated by in situ polymerization and their applications in a thermoelectric device and a platinum （Pt）-free dye-sensitized solar cell （DSSC） as energy harvesting systems. Graphene was dispersed in a solution of poly（4-styrenesulfonate） （PSS） and polymerization was directly carried out by addition of 3,4-ethylenedioxythiophene （EDOT） monomer to the dispersion. The content of the graphene was varied and optimized to give the highest electrical conductivity. The composite solution was ready to use without any reduction process because reduced graphene oxide was used. The fabricated film had a conductivity of 637 S.cm-1, corresponding to an enhancement of 41%, after the introduction of 3 wt.% graphene without any further complicated reduction processes of graphene being required. The highly conductive composite films were employed in an organic thermoelectric device, and the device showed a power factor of 45.7 μW·m^-1K^-2 which is 93% higher than a device based on pristine PEDOT：PSS. In addition, the highly conductive composite films were used in Pt-free DSSCs, showing an energy conversion efficiency of 5.4%, which is 21% higher than that of a DSSC based on PEDOT：PSS.展开更多
Polyaniline doped with rare earth chloride was synthesized in organic solvent and identified by elemental analysis and infrared spectroscopy. The experimental results show that there exists both doping and complexatio...Polyaniline doped with rare earth chloride was synthesized in organic solvent and identified by elemental analysis and infrared spectroscopy. The experimental results show that there exists both doping and complexation at the same time in the resulting product. When pH4. Moreover, polyaniline doped with rare earth chloride exhibits better thermal stability than that doped with hydrochloric acid.展开更多
A novel organic disulfide, 2,2 diaminophenyloxydisulfide(DAPD) has been prepared by the reaction of o aminophenol with sulfur monochloride in THF. Its polymer films are formed by electropolymerization from a AN/THF ...A novel organic disulfide, 2,2 diaminophenyloxydisulfide(DAPD) has been prepared by the reaction of o aminophenol with sulfur monochloride in THF. Its polymer films are formed by electropolymerization from a AN/THF solution containing 0.1 mol/L LiClO 4, 0.1 mol/L HCl and 0.05 mol/L DAPD monomer on Pt electrode under continuous cycling between -0.30 V and 1.20 V vs . Ag/AgCl (sat. KCl) at scanning rate 50 mV/s. The cyclic voltammetry shows that its electrochemical behavior is similar to that of polyaniline. The redox peak current of the cyclic voltammograms increase with increasing of the cyclic times. The electronic conductivity of poly (DAPD) can reach from 2.1×10 -3 to 8.7×10 -3 S/cm. Two main facts are considered to be necessary for obtaining electroactive poly (DAPD) in electropolymerization process. One is the existence of sufficient concentration of the supporting electrolyte to enhance the ionic conductivity of AN/THF solution and the other is the existence of protons from the acid HCl. With an increase in acid content of the solution, the polymerization efficiency as well as the electroactivity of poly (DAPD) films show a striking enhancement and the electronic conductivity of poly (DAPD) film increases. But the concentration of HCl would be quite high to result in the decomposition of DAPD monomer.展开更多
文摘We report for the first time highly conductive poly（3,4-ethylenedioxythiophene）： poly（4-styrenesulfonate） （PEDOT：PSS）/graphene composites fabricated by in situ polymerization and their applications in a thermoelectric device and a platinum （Pt）-free dye-sensitized solar cell （DSSC） as energy harvesting systems. Graphene was dispersed in a solution of poly（4-styrenesulfonate） （PSS） and polymerization was directly carried out by addition of 3,4-ethylenedioxythiophene （EDOT） monomer to the dispersion. The content of the graphene was varied and optimized to give the highest electrical conductivity. The composite solution was ready to use without any reduction process because reduced graphene oxide was used. The fabricated film had a conductivity of 637 S.cm-1, corresponding to an enhancement of 41%, after the introduction of 3 wt.% graphene without any further complicated reduction processes of graphene being required. The highly conductive composite films were employed in an organic thermoelectric device, and the device showed a power factor of 45.7 μW·m^-1K^-2 which is 93% higher than a device based on pristine PEDOT：PSS. In addition, the highly conductive composite films were used in Pt-free DSSCs, showing an energy conversion efficiency of 5.4%, which is 21% higher than that of a DSSC based on PEDOT：PSS.
文摘Polyaniline doped with rare earth chloride was synthesized in organic solvent and identified by elemental analysis and infrared spectroscopy. The experimental results show that there exists both doping and complexation at the same time in the resulting product. When pH4. Moreover, polyaniline doped with rare earth chloride exhibits better thermal stability than that doped with hydrochloric acid.
文摘A novel organic disulfide, 2,2 diaminophenyloxydisulfide(DAPD) has been prepared by the reaction of o aminophenol with sulfur monochloride in THF. Its polymer films are formed by electropolymerization from a AN/THF solution containing 0.1 mol/L LiClO 4, 0.1 mol/L HCl and 0.05 mol/L DAPD monomer on Pt electrode under continuous cycling between -0.30 V and 1.20 V vs . Ag/AgCl (sat. KCl) at scanning rate 50 mV/s. The cyclic voltammetry shows that its electrochemical behavior is similar to that of polyaniline. The redox peak current of the cyclic voltammograms increase with increasing of the cyclic times. The electronic conductivity of poly (DAPD) can reach from 2.1×10 -3 to 8.7×10 -3 S/cm. Two main facts are considered to be necessary for obtaining electroactive poly (DAPD) in electropolymerization process. One is the existence of sufficient concentration of the supporting electrolyte to enhance the ionic conductivity of AN/THF solution and the other is the existence of protons from the acid HCl. With an increase in acid content of the solution, the polymerization efficiency as well as the electroactivity of poly (DAPD) films show a striking enhancement and the electronic conductivity of poly (DAPD) film increases. But the concentration of HCl would be quite high to result in the decomposition of DAPD monomer.
