Hybrid thermo-electrochemical energy harvesters for conversion of low-grade thermal energy into electricity via tungsten electrodes

Jung, Sang‐Mun; Kwon, Jaesub; Lee, Jinhyeon; Lee, Byung‐Jo; Kim, Kyu‐Su; Yu, Dong-Seok; Kim, Yong‐Tae

doi:10.1016/j.apenergy.2021.117334

Cited by 21 publications

(26 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12,22–24 Some studies have focused on improving performance by using electrodes with a large specific surface area, but this was not the focus of the present work. 25–30 The molecular structures of the selected organic solvents are shown in Fig. 1, and various properties are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Organic solvent-based thermo-electrochemical cells with an iron(ii/iii) triflate redox couple for use in harvesting low-grade waste heat at 100–200 °C

Asai

Lee

Yabuki

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Organic solvent-based thermo-electrochemical cells with an iron(ii/iii) triflate redox couple for use in harvesting low-grade waste heat at 100–200 °C

Asai

Lee

Yabuki

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…All calculations are summarized in Table S2. Nevertheless, from the environmental aspects, Pb is well known for its toxicity to multiple human body systems and living organisms, including animals and humans. − Thus, an additional treatment process for Pb waste should be followed. The adsorption method using nano-scale adsorbents is one of the most widely used methods for gathering heavy metals from wastewater, , and we should manage the Pb waste generated as a byproduct after repeated RC events.…”

Section: Resultsmentioning

confidence: 99%

Cathodic Protection System against a Reverse-Current after Shut-Down in Zero-Gap Alkaline Water Electrolysis

Kim

Jung

Kim

et al. 2022

JACS Au

Self Cite

View full text Add to dashboard Cite

Growing the hydrogen economy requires improving the stability, efficiency, and economic value of water-splitting technology, which uses an intermittent power supply from renewable energy sources. Alkaline water electrolysis systems face a daunting challenge in terms of stabilizing hydrogen production under the condition of transient start-up/shut-down operation. Herein, we present a simple but effective solution for the electrode degradation problem induced by the reverse-current under transient power condition based on a fundamental understanding of the degradation mechanism of nickel (Ni). It was clearly demonstrated that the Ni cathode was irreversibly oxidized to either the β-Ni(OH) 2 or NiO phases by the reverse-current flow after shut-down, resulting in severe electrode degradation. It was also determined that the potential of the Ni electrode should be maintained below 0.6 V RHE under the transient condition to keep a reversible nickel phase and an activity for the hydrogen evolution reaction. We suggest a cathodic protection approach in which the potential of the Ni electrode is maintained below 0.6 V RHE by the dissolution of a sacrificial metal to satisfy the above requirement; irreversible oxidization of the cathode is prevented by connecting a sacrificial anode to the Ni cathode. In the accelerated durability test under a simulated reverse-current condition, lead was found to be the most promising candidate for the sacrificial metal, as it is cost effective and demonstrates chemical stability in the alkaline media. A newly defined metric, a reverse-current stability factor, highlights that our system for protecting the cathode against the reverse-current is an efficient strategy for stable and cost effective alkaline hydrogen production.

show abstract

“…For another W-based electrode, the Seebeck coefficient can be enhanced by two synergistic reactions as shown in Fig. 12e: 102 the redox reaction of the electrolyte and the oxidation reaction of tungsten electrodes. The developed tungsten electrode-based hybrid thermocell generates a Seebeck coefficient of 1.66 mV K −1 and power output of 425 mW m −2 , which is 70% higher than that of platinum or carbon electrodes as shown in Fig.…”

Section: Progress Of Redox-induced Thermocellsmentioning

confidence: 99%

Redox-induced thermocells for low-grade heat harvesting: mechanism, progress, and their applications

Sun

et al. 2022

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

Hybrid thermo-electrochemical energy harvesters for conversion of low-grade thermal energy into electricity via tungsten electrodes

Cited by 21 publications

References 47 publications

Organic solvent-based thermo-electrochemical cells with an iron(ii/iii) triflate redox couple for use in harvesting low-grade waste heat at 100–200 °C

Organic solvent-based thermo-electrochemical cells with an iron(ii/iii) triflate redox couple for use in harvesting low-grade waste heat at 100–200 °C

Cathodic Protection System against a Reverse-Current after Shut-Down in Zero-Gap Alkaline Water Electrolysis

Redox-induced thermocells for low-grade heat harvesting: mechanism, progress, and their applications

Contact Info

Product

Resources

About