Preparation and Electrical Properties of Polytetracyano-ethylene Copper Chelate Film

Abstract

The preparation and physical properties of polytetracyano-ethylene (TCNE) copper chelate film were studied. The reaction of TCNE with copper consists of the first rapid and the second slow processes. An optimized condition for the preparation was to heat for 9 to 24 hours at 400°C. Element analysis of carbon and copper, and electron probe microanalysis revealed nonuniform distribution of copper atoms across the film, about 30 % near the surface based on the copper plate and 20 % on the opposite side. The electrical conductivity shows a remarkable anisotropic effect in both directions of perpendicular and along the base side, with activation energy of 0.1 to 0.5 eV, and the highest conductivity of 10-1 mho.cm-1. Heat treatment changes the distribution of copper, free radical concentration, electrical conductivity, and dielectric properties of the film. Nonohmic conduction appears on the perpendicular direction and was interpreted as space-charge-limited mechanism. The excess copper atoms over the chelate composition (TCNE: Cu=2:1) may contribute to the high conductivity on the base surface and dielectric properties.

Highly Active Tetracyanoethylene Derived Non-precious Metal Catalyst for Oxygen Reduction Reaction in PEM Fuel Cell

“…In this study, synthesis NPMC with high active site density was achieved by choosing a novel nitrogen precursor, tetracyanoethylene (TCNE) and synthesizing these polymer films which are to adsorb on the surface of the Ketjen Black 600JD carbon support, shown in Figure 1a and 1b, respectively. Pyrolysis of the resulting carbons would destroy the chelate structure and leave behind evenly distributed and densely packed iron nanoparticles on the carbon surface, creating active sites for the ORR [4][5][6]. Half cell rotating disk electrode experiments were conducted for four samples utilized TCNE as a precursor where the samples were synthesized with different weight percent ratio of TCNE to carbon (5, 10, 15 and 20 wt.…”