Re the "potential of zero charge", I imagine an equal and opposite potential must exist at the other electrode to null the inter-electrode voltage, otherwise I don't see how the charge of the capacitor Q=C*V could be zero.
Michel ----- Original Message ----- From: "Frederick Sparber" <[EMAIL PROTECTED]> To: "vortex-l" <[email protected]> Sent: Monday, May 22, 2006 1:20 PM Subject: Re: Helmholtz Layer Metal-Water Interface, Joe Cell Etc > This is the backbone of "Ultracapacitor-Supercapacitor" Technology. > > http://electrochem.cwru.edu/ed/encycl/art-c03-elchem-cap.htm > > "Helmholtz envisaged a capacitor-like separation of anionic and cationic > charges across the interface of colloidal particles with an electrolyte. > For electrode interfaces with an electrolyte solution, this concept was > extended to model the separation of "electronic" charges residing at the > metal electrode surfaces (manifested as an excess of negative charge > densities under negative polarization with respect to the electrolyte > solution or as a deficiency of electron charge density under positive > polarization), depending in each case, on the corresponding potential > difference between the electrode and the solution boundary at the > electrode. For zero net charge, the corresponding potential is referred to > as the "potential of zero charge"." > > General: > http://www.thejoecell.com/index.html > > Plans: > > http://www.thejoecell.com/Plans.html > > ----- Original Message ----- > From: Frederick Sparber > To: vortex-l > Sent: 5/22/2006 4:16:56 AM > Subject: Re: Helmholtz Layer Metal-Water Interface, Joe Cell Etc >> >> This is in contrast with the 4-circular-concentric-cell "Joe Cell" >> (with 1 Megohm-cm water with dissolved CO2) >> Total Resistance ~ 10,000 ohms = 1.2 milliamperes at 12 volts DC. >> Series Capacitance ~2.8 to ~5.6 nanofarads/cell >> > Flat projection of the Joe Cell Electrodes: > _____________________________________ 6.00 inch dia Anode. > ________________________________ 5.00inch dia > ___________________________ 4.00 inch dia > _______________________3.00inch dia > ___________________ 2.0 inch dia Cathode > > For the purest that wants to nail down the capacitance: > > http://hyperphysics.phy-astr.gsu.edu/HBASE/electric/capcyl.html > > "the capacitance per unit length is defined as" > > C/L = 2 (pi) K * eo/ ln [b/a] > Posted earlier. >> >> With our cell, adding a very small amount of baking >> soda increased the current from 2 milliamperes up >> to 21 milliamperes. >> Gas yield tests are under way using balloons so that >> pressure or vacuum in the electrolysis chamber can be handled. >> > At 17-19 milliamperes, several hours of electrolysis yielded only small > gas production on the 12- wall plate 2.75 x 4.5 inch (SS each 70 cm^2 > spaced 1.0 cm) > with 12 volts DC applied to the end plates (11 cells in series). > More NaHCO3-water solution was fed to the sealed cell, which > increased the current to 500 milliamperes. (6 watts at ~ 1.1 volts/cell) > The balloon inflated post haste. :-) > Total cell resistance 24 ohms, ohms/cell 24/11 = 2.2 ohms > Electrolyte resistivity (rho) = 70 * 2.2 = 153 ohm-cm >> >> This is in contrast with the 4-circular-concentric-cell "Joe Cell" >> (with 1 Megohm-cm water with dissolved CO2) >> Total Resistance ~ 10,000 ohms = 1.2 milliamperes at 12 volts DC. >> Series Capacitance ~2.8 to ~5.6 nanofarads/cell
