Ni mesh

The cell used (Fig. 16) is an undivided, so called Swiss-roll cell (Figs. 16 and 17) with a Ni mesh anode and a steel cathode. 

To prepare a working electrode, carbon powder (PFA-P7-H or PFA-AN8-H) was mixed with polytetrafluoroethylene (PTFE) (5 wt%) to form a pellet and it was sandwiched in Ni mesh as a current collector. The EDL capacitance properties were measured by CV and galvanostatic charge/ discharge in a three-electrode cell vs. Ag/AgCl reference electrode. 1 M-(C2H5)4NBF4 in PC was used as a nonaqueous electrolyte. 

Figure 13 Schematic for a model capacitor with gel electrolyte (1) Ni wire, (2) Ni plate, (3) conducting plastic sheet, (4) gel electrolyte, (5) Teflon prop, (6) ACFC electrode, (7) Ni mesh.

Besides spectroscopic techniques such as infrared-reflection-absorption spectroscopy (IRRAS) and X-ray photoelectron spectroscopy (XPS), SFM-based stiffness imaging was applied in order to detect radiation-induced variations of surface stiffness [180]. For that purpose, when exposing the PE-film to the VUV-radiation, the film was covered with a Ni mesh. Thus, the PE-film was partially masked and exposed to the VUV radiation only within the square-shaped holes of the mesh. After having finished that treatment and having removed the mesh, the sample surface was scanned in force modula-... 

Fig. 13.8 Change in the percentage of pentachlorophenol (PCP) removal for the electrochemical HDH of saturated aqueous solution using a Nation 117 membrane reactor. Active area 20 cm2. Cathode Pd or Pt/Ti mesh (2 mg Pd or Ptcm-2), Fe or Ni mesh. Anode Pt/Ti mesh (2mgPtcm-2). Anolyte Water. Flow rate 100ml min-1. Applied current density 10mAcm-2. Temperature 17 0.5°C...

Zhao, Y., Wang, W., Yun, F., Xu, Liao, X., Ma, Z., Yue, G. and Kong, G. (2000) Experimental Insight into the Performance Characteristics of Ni-mesh Semiconductor Photo-Electrochemical Cells, Solar Ener Materials. Solar Cells, Vol. 62, pp.43-49. 

The E-design stack, shown in Fig. lA, consists of a relatively thick metallic interconnect with machined gas channels on both sides and a metallic picture frame for the cell, brazed to the interconnect by a metal solder. Sealing is obtained by glass ceramic sealants applied to the planar cell and frame surfaces using an automated dispenser. A fine Ni-mesh is spot-welded to the fuel side of the interconnect in order to improve the electrical contact between interconnect and anode substrate. On the air side usually a lanthanum cobaltite (LC) contact layer is sprayed onto the ribs of the interconnect. 

SEMs of the molybdenum mask (Type B) and the nickel mesh (Type C) used in the experiments. The Ni mesh was also used as a spacer of thickness 4.5pm and flexible enough to be folded over several times for spacer thickness to be increased in small increments. Mask Type A (not shown) was identical to Type B, except the aperture that had a cylindrical profile with straight walls, and not the biconical ones of Type A. 

Two instances of micron-scale resolution patterning are illustrated by the SEMs in Figure 2.22 (a) Alqj patterns deposited on Si by VTE through Ni meshes at Psubstrate rotation, and (b) analogous patterns deposited by OVPD at P ep = 2 torr. The vacuum-deposited patterns show the trapezoidal profile discussed in Section 2.5 where p < 1pm, while OVPD patterns have edge dispersion in the order of 1-3 pm. Simulations in... 

For deposition of copper onto polyaniline, the dispersion was dried on a stainless steel foil. Copper was evaporated from a tungsten crucible. For the TEM measurements, thin polyaniline films were prepared on glass slides. To transfer the polyaniline films onto Ni meshes, the glass slides were dipped... 

Figure 17.14 SEM cross-sectional micrographs of various stack zones after stack testing (a) interdiffusion between Cro-fer22APU interconnect and metallic Ni mesh (b) sealing situation between interconnect.

Recent developments demonstrated the great potential of activated carbon as low-cost cathode material, which can be formed by cold pressing-activated carbon with a PTFE binder around a Ni mesh current collector. Such a cathode structure avoided the need for carbon cloth or a metal catalyst, and produced a cathode with high activity for oxygen reduction at typical MFC current densities [72]. Tests with the AC cathode produced a maximum power density of 1220 mW m , compared with 1060 mW m obtained by Pt-catalyzed carbon cloth cathode. Other carbon material, including activated carbon fiber felt [56] and HNOs-treated carbon powder (Vulcan XC-72R) [73], also demonstrated good performance for oxygen reduction reaction in MFCs. 

FIGURE 10.7 Fabrication of polymer/carbon architectures for bioelectrodes, (a) (1) Sucrose template is mixed with (2) carbon nanofibers and placed in a (3) Teflon mold along with a Ni mesh current collector attached to a Ti wire, (b) The mixture is coated with liquid PHBV polymer, (c) After the polymer solidifies, the composite is submerged in water to dissolve the sucrose template leaving behind a conductive porous architecture [21]. 

Charge and discharge curves of LiCoC at different current densities in 0.5 M U2SO4 aqueous solution between 0.25 and 1.30 V using Ni mesh and saturated calomel electrode (SCE) as the counter and the reference electrodes, respectively. (Copyright from Elsevier.)... 

Often the corrosion of the interconnect on the anode side is not an issue because Ni meshes are used and these make good electrical contact with the interconnect. However, the Ni wires can also be corrosively attacked during... 

Fig. 26 Schematic drawing of sealing and contact layers within the stack CA = contact layer anode (Ni-mesh) E = electrolyte C = cathode CE = contact layer cathode (Buchkremer et al. 1997).

Schematic sketch of the setup is shown in Fig. 112. Humidified (5% RH) hydrogen at 0.03-0.2 L/min and air at ambient conditions were used as a fuel and an oxidant, respectively. Pt paste and Pt mesh from the cathode and Pt paste and Ni mesh from the anode side were used as current collectors.

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