Can CuFeS2 be used in a sensitized thermal cell?

Sekiya, Hayato; Isobe, Toshihiro; Nakajima, Akira; Matsushita, Sachiko

doi:10.1016/j.mtener.2020.100469

Cited by 5 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To address these situations, a new thermal cell concept, named semiconductor-sensitized thermal cells (STCs) that can generate electric power directly from heat and have simple modules, was developed. − The STC structure imitates that of dye-sensitized solar cells (DSSCs). − In DSSCs, the electrons in dyes are excited by light irradiation. The excited electrons are injected in the conduction band of an electron transport material and transferred to the counter electrode.…”

Section: Introductionmentioning

confidence: 99%

Electrolyte Thickness Dependence upon Ge-Sensitized Thermal Cells

Kohata

Mei²,

Wang³

et al. 2022

Energy Fuels

Self Cite

View full text Add to dashboard Cite

The semiconductor-sensitized thermal cell (STC) is an attractive technology that used low-temperature heat (<200 °C). STC generates electricity by the redox reactions of electrolyte ions with thermally excited carriers in semiconductors. The most valuable feature of the STC is that, after power generation was completed, the performance recovers by leaving the cell in the heat source. However, the reason for this restore has been unclear. In this study, the recovery phenomenon was investigated with the viewpoint of electrolyte thickness. As a result, the cell with the thinnest thickness and smallest quantity of electrolyte discharged for the longest time, with faster recovery and better discharge characteristics. These consequences clearly demonstrated the difference between primary batteries and STCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrolyte Thickness Dependence upon Ge-Sensitized Thermal Cells

Kohata

Mei²,

Wang³

et al. 2022

Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…[137] Moreover, Sekiya et al showed that CuFeS 2 can be used as a thermally sensitized cell to convert heat into electricity directly. [138] 7. Future Outlook…”

Section: Photothermal Propertiesmentioning

confidence: 99%

Copper Iron Chalcogenide Semiconductor Nanocrystals in Energy and Optoelectronics Applications—State of the Art, Challenges, and Future Potential

Bhattacharyya

Balischewski

Pacholski

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

I‐III‐VI2 semiconductor nanocrystals have been explored in countless optoelectronics and green energy applications. While indium‐based compounds are arguably the best‐known variants of these semiconductors and have been widely studied for their photophysical properties, other I‐III‐VI2 semiconductors are emerging as serious competitors. This review focuses on the current state of the art and recent progress made in the research and technology of one of the most promising competitors to indium‐based I‐III‐VI2 semiconductor nanocrystals, CuFeS2 nanocrystals. CuFeS2 is a promising alternative to indium‐based systems, mostly because many properties are competitive and because iron is much more abundant than indium. Replacing In(III) with Fe(III) would thus significantly alleviate the issue of raw material availability. The article highlights new synthesis approaches and summarizes and discusses advanced optical properties including surface plasmon resonance and luminescence properties. Moreover, potential applications in thermoelectric, photodetection, photothermal, and photovoltaics are illustrated and discussed. Finally, future perspectives for materials development, upscaling, and application in new processes and devices, such as self‐assembly, patterning, or plasmonic catalysis, are presented as well.

show abstract

“…The semiconductor-sensitized thermal cell (STC) has been developed to establish a new thermoelectric conversion technology in our group [ 4 , 5 , 6 , 7 , 8 , 9 ]. In detail, when thermal energy is applied to the semiconductor, thermally excited charges (electrons and holes) are generated in the semiconductor, and then they reduce and oxidize electrolyte ions.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation of PVDF-HFP-Based Gel Electrolyte for Ge-Sensitized Thermal Cell

Chai,

Matsushita

2024

Polymers

View full text Add to dashboard Cite

The semiconductor-sensitized thermal cell (STC) is a new thermoelectric conversion technology. The development of nonliquid electrolytes is the top priority for the practical application of the STC. In this study, a novel gel polymer electrolyte (PH-based GPE) composed of poly(vinylidenefluoride-co-hexafluoropropylene) (PH), 1-Methyl-2-pyrrolidone (NMP), and Cu ions was synthesized and applied to the STC system. The PH-based GPE synthesized at 45 °C showed higher open-circuit voltage (−0.3 V), short-circuit current density (59 μA cm−2) and diffusion coefficient (7.82 × 10−12 m2 s−1), indicating that a well-balanced structure among the NMP molecules was formed to generate a high-efficiency conduction path of the Cu ions. Moreover, the ion diffusion lengths decreased with decreasing content rates of NMP for the PH-based GPEs, indicating that the NMP plays an important role in the diffusion of Cu ions. Furthermore, the activation energy was calculated to be 107 kJ mol−1, and that was smaller compared to 150 kJ mol−1 for the poly(ethylene glycol)-based liquid electrolyte. These results play an important reference role in the development of electrolytes for STC systems. At the same time, they also provide a new avenue and reference indicator for the synthesis of high-performance and safe GPEs.

show abstract

Can CuFeS2 be used in a sensitized thermal cell?

Cited by 5 publications

References 22 publications

Electrolyte Thickness Dependence upon Ge-Sensitized Thermal Cells

Electrolyte Thickness Dependence upon Ge-Sensitized Thermal Cells

Copper Iron Chalcogenide Semiconductor Nanocrystals in Energy and Optoelectronics Applications—State of the Art, Challenges, and Future Potential

Preparation and Evaluation of PVDF-HFP-Based Gel Electrolyte for Ge-Sensitized Thermal Cell

Contact Info

Product

Resources

About