3 ms·
The voltage changes in that case. In this case, a voltage difference exists between two materials with the same voltage relative to reference. It is as if you
by hwillis 10y ago
The voltage changes in that case. In this case, a voltage difference exists between two materials with the same voltage relative to reference. It is as if you got pure gasoline out of a cars tailpipe.
- tcpekin 10y agoI think they start with Li on one side, and a Cu/C/S cathode on the other, and then plate the lithium on the anode. They measure a difference in chemical potentials between cathode and anode, so there is reason for the Li to move, and as the Li moves, I think I remember the V_cell decreasing. From the paper: > At the cathode, the build-up of plated metallic lithium changes the morphology of the cathode to increase C_C and create a very slow fade of V_cell with time of discharge
- btilly 10y agoYes, but you can make the voltage not change. Take the same capacitor, but make each plate into 2 layers. Pull the outer layers away and attach your electrodes to the inner layers. You can arrange to have more energy, at the same voltage. As the capacitor discharges, bring the outer layers in to keep the voltage across the inner plates constant. Reverse the process as it charges. Please be clear, I'm not claiming that their battery works this way, or even that it works at all. I'm only making the claim that it is actually possible to design a device where what looks impossible here is not necessarily impossible.