Journal
NANO ENERGY
Volume 94, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.106946
Keywords
Ion-permselectivity; PEDOT-PSS ; Transpiration-driven electrokinetic power generator ; Seawater; Energy harvesting
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Funding
- Samsung Research Funding & In-cubation Center of Samsung Electronics [SRFC-MA1802-05]
- Republic of Korea
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1F1A106357111]
- [NRF-2021R1F1A106357111]
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The PEDOT:PSS-based transpiration-driven electrokinetic power generator (p-TEPG) demonstrates higher energy density and enhanced volumetric and areal energy/power densities compared to carbon-based TEPG. The p-TEPG utilizes cations to establish additional potential difference in the polymer matrix, maximizing energy generation efficiencies. Seawater produced on a single p-TEPG device is sufficient to charge electrical energy storage systems and operate low-powered electronic devices.
Hydro-electric technology has gathered much attention by the virtue of water as the energy source. However, the low energy density of this technology severely limits its practical use. Here, we demonstrate a PEDOT:PSS-based transpiration-driven electrokinetic power generator (p-TEPG) that enables the utilization of a wider variety of real-world water resources for maximizing energy generation efficiencies. In addition to the conventional electrical double layer on the material surface, the p-TEPG builds an additional potential difference in the polymer matrix by the selective penetration of cations into the matrix that contains sulfonate functional groups. p-TEPG exhibits 80-250% higher energy density than carbon-based TEPG at the same resistance. Moreover, seawater produced enhanced volumetric energy/power densities (34.36 mJ cm(-3) and 44.70 mu W cm(-3)) and areal energy/power densities (410 mu J cm(-2) and 0.45 mu W cm(-2)), respectively, compared to DI water on a single p-TEPG device, which is sufficient to charge electrical energy storage systems and directly operate low-powered electronic.
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