Photobatteries and Photocapacitors
| Autor: | Nick Vlachopoulos, Anders Hagfeldt |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Conductive polymer
Materials science Oxide Nanotechnology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Energy storage 0104 chemical sciences law.invention chemistry.chemical_compound Capacitor Dye-sensitized solar cell chemistry law Electrode Pseudocapacitor 0210 nano-technology |
| Zdroj: | Green Chemistry and Sustainable Technology ISBN: 9789811059230 |
| DOI: | 10.1007/978-981-10-5924-7_8 |
| Popis: | This chapter is dedicated to the interfacing of dye-sensitized solar cells (DSSCs) and electrochemical energy storage cells. After a brief introduction to the basic principles of useful and deleterious reactions at the photoelectrode, as related to the analysis of the present chapter, and to the necessary terminology, photobatteries are discussed, of which two main types can be distinguished: these based solely on redox reactions in solution, usually with the necessity for external storage of the solutions, due to the low energy density of the electrolyte solutions, and these incorporating solid energy storage materials with high energy density, e.g., metals, metal oxides or electronically conducting polymers, in one of the electrodes. In addition to the most common three-electrode model, alternative two-electrode and four-electrode (two separate cells in series) systems are presented. Subsequently, photocapacitors are introduced. After a presentation of the basic concepts of electrochemical supercapacitor concepts and operation, the two basic types of photocapacitor, that of two and three-electrode, are presented, with a discussion of the disadvantages of the first type, despite the construction simplicity, as compared to the second one. In the latter, light is harvested by a DSSC, based either on a liquid electrolyte containing a redox mediator or a solid hole conductor, juxtaposed to a capacitor based on carbon, metal oxide or conducting polymer electrodes. For both photobatteries and photocapacitors several systems are discussed, with the various processes at and between the electrodes presented in detail. Moreover, the various formulas for the calculation of energy storage efficiency are explained. |
| Databáze: | OpenAIRE |
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