High Power-Density Moisture Electric Generators via Aligned Ionic Polymer-Carbon Heterojunctions
발표자
박신오 (연세대학교)
연구책임자
김진보 (연세대학교)
공동저자
박신오 (연세대학교), 김진보 (연세대학교)
초록
내용
Mositure Electricity Generators (MEGs), a type of an energy harvester, have gained attention due to easy electricity generation from humidity. Since maintaining an ion concentration gradient is crucial, bilayer MEGs are widely being studied.
Herein, we introduce a heterojunction bilayer MEG consisting of a hygroscopic polymer as an energy generator and an aligned-channel carbon-MOF structure to facilitate water evaporation.
As relative humidity increased, the voltage decreased due to reduced ion concentration gradient from low water evaporation. Conversely, the current density increased because of the ion channel percolation expansion enhancing ionic conductivity.
Cationic polymers exhibited better performances than anionic polymers due to the interaction between metal ions on the MOF and the anions from the polymer.
With optimized electrodes, our MEG achieved the voltage and current density of 0.67 V and 0.19 mA/cm2, respectively and high power density of 122 μW/cm2 at 60 RH%.