My takeaways from the Nature article: The underlying driving enthalpy seems to be the solvent adsorption exotherm. By extension once full wetted the particles

My takeaways from the Nature article: The underlying driving enthalpy seems to be the solvent adsorption exotherm. By extension once full wetted the particles stop producing voltage, but can be dried and rewetted. As with typical electrochemistry both an oxidation and reduction are performed simultaneously: Oxidation on the PTFE side and reduction on the CNT side. Essentially each particle is its own little electrochemical cell, deriving its working potential from the solvent-surface interaction.