Ageing and thermal stability studies on quasi-solid composite electrolytes for Grätzel-type solar cells

Part 1. Application of thermogravimetry and coupled methods of evolved gas analysis (TG/DTA-MS and TG-FTIR)

J. Madarász, Viola Nagygyörgy, Elias Stathatos, G. Pokol

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Loss of volatile components from two types of quasi-solid gel electrolytes to be used in Grätzel (or dye-sensitized, DSSC)-type alternative solar cells are checked time to time by thermogravimetry (TG) to follow the stability or changes of composites during storage at ambient. One of the gel samples, labeled as P2000 and based on UreaSil 2000, a 3D-cage precursor compound, has been found quite stable, while the related P230 sample based on UreaSil 230 seems to have a bit higher deviation in heterogeneity and some tendencies losing gradually from its volatile content, time to time. In addition, two online coupled evolved gas analytical tools (TG-EGA-FTIR and TG/DTA-EGA-MS) are applied to check the gel electrolytes for thermal vaporization, degradation, and decomposition processes as a function of temperature during dynamic heating in air. Initial minor elimination of ethyl acetate has been detected by both in situ coupled mass spectroscopy and FTIR spectroscopic gas cell. According to both evolved gas analytical systems, the other liquid ingredients, acetic acid (AcOH) and sulfolane are also released in the order of their volatility. Above 300 C, an oxidative thermal degradation of UreaSil-type host matrices is indicated by the occurrence of, among others, formaldehyde or ammonia for electrolyte samples P2000 and P230, respectively. Evolution of various alkyl iodides with short chain length has only been detected by the mass spectroscopic evolved gas analysis method only.

Original languageEnglish
Pages (from-to)1055-1062
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
Volume113
Issue number3
DOIs
Publication statusPublished - Sep 2013

Fingerprint

Gas fuel analysis
gas analysis
thermogravimetry
Differential thermal analysis
Electrolytes
Thermogravimetric analysis
Solar cells
thermal analysis
Thermodynamic stability
thermal stability
solar cells
Aging of materials
Gases
Gels
electrolytes
composite materials
Composite materials
gels
gases
Iodides

Keywords

  • Dye-sensitized solar cells
  • Evolved gas analyses
  • Hybrid materials
  • Quasi-solid state electrolytes
  • TG-EGA-FTIR gas cell
  • TG/DTA-EGA-MS
  • Thermogravimetry

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

Cite this

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title = "Ageing and thermal stability studies on quasi-solid composite electrolytes for Gr{\"a}tzel-type solar cells: Part 1. Application of thermogravimetry and coupled methods of evolved gas analysis (TG/DTA-MS and TG-FTIR)",
abstract = "Loss of volatile components from two types of quasi-solid gel electrolytes to be used in Gr{\"a}tzel (or dye-sensitized, DSSC)-type alternative solar cells are checked time to time by thermogravimetry (TG) to follow the stability or changes of composites during storage at ambient. One of the gel samples, labeled as P2000 and based on UreaSil 2000, a 3D-cage precursor compound, has been found quite stable, while the related P230 sample based on UreaSil 230 seems to have a bit higher deviation in heterogeneity and some tendencies losing gradually from its volatile content, time to time. In addition, two online coupled evolved gas analytical tools (TG-EGA-FTIR and TG/DTA-EGA-MS) are applied to check the gel electrolytes for thermal vaporization, degradation, and decomposition processes as a function of temperature during dynamic heating in air. Initial minor elimination of ethyl acetate has been detected by both in situ coupled mass spectroscopy and FTIR spectroscopic gas cell. According to both evolved gas analytical systems, the other liquid ingredients, acetic acid (AcOH) and sulfolane are also released in the order of their volatility. Above 300 C, an oxidative thermal degradation of UreaSil-type host matrices is indicated by the occurrence of, among others, formaldehyde or ammonia for electrolyte samples P2000 and P230, respectively. Evolution of various alkyl iodides with short chain length has only been detected by the mass spectroscopic evolved gas analysis method only.",
keywords = "Dye-sensitized solar cells, Evolved gas analyses, Hybrid materials, Quasi-solid state electrolytes, TG-EGA-FTIR gas cell, TG/DTA-EGA-MS, Thermogravimetry",
author = "J. Madar{\'a}sz and Viola Nagygy{\"o}rgy and Elias Stathatos and G. Pokol",
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T1 - Ageing and thermal stability studies on quasi-solid composite electrolytes for Grätzel-type solar cells

T2 - Part 1. Application of thermogravimetry and coupled methods of evolved gas analysis (TG/DTA-MS and TG-FTIR)

AU - Madarász, J.

AU - Nagygyörgy, Viola

AU - Stathatos, Elias

AU - Pokol, G.

PY - 2013/9

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N2 - Loss of volatile components from two types of quasi-solid gel electrolytes to be used in Grätzel (or dye-sensitized, DSSC)-type alternative solar cells are checked time to time by thermogravimetry (TG) to follow the stability or changes of composites during storage at ambient. One of the gel samples, labeled as P2000 and based on UreaSil 2000, a 3D-cage precursor compound, has been found quite stable, while the related P230 sample based on UreaSil 230 seems to have a bit higher deviation in heterogeneity and some tendencies losing gradually from its volatile content, time to time. In addition, two online coupled evolved gas analytical tools (TG-EGA-FTIR and TG/DTA-EGA-MS) are applied to check the gel electrolytes for thermal vaporization, degradation, and decomposition processes as a function of temperature during dynamic heating in air. Initial minor elimination of ethyl acetate has been detected by both in situ coupled mass spectroscopy and FTIR spectroscopic gas cell. According to both evolved gas analytical systems, the other liquid ingredients, acetic acid (AcOH) and sulfolane are also released in the order of their volatility. Above 300 C, an oxidative thermal degradation of UreaSil-type host matrices is indicated by the occurrence of, among others, formaldehyde or ammonia for electrolyte samples P2000 and P230, respectively. Evolution of various alkyl iodides with short chain length has only been detected by the mass spectroscopic evolved gas analysis method only.

AB - Loss of volatile components from two types of quasi-solid gel electrolytes to be used in Grätzel (or dye-sensitized, DSSC)-type alternative solar cells are checked time to time by thermogravimetry (TG) to follow the stability or changes of composites during storage at ambient. One of the gel samples, labeled as P2000 and based on UreaSil 2000, a 3D-cage precursor compound, has been found quite stable, while the related P230 sample based on UreaSil 230 seems to have a bit higher deviation in heterogeneity and some tendencies losing gradually from its volatile content, time to time. In addition, two online coupled evolved gas analytical tools (TG-EGA-FTIR and TG/DTA-EGA-MS) are applied to check the gel electrolytes for thermal vaporization, degradation, and decomposition processes as a function of temperature during dynamic heating in air. Initial minor elimination of ethyl acetate has been detected by both in situ coupled mass spectroscopy and FTIR spectroscopic gas cell. According to both evolved gas analytical systems, the other liquid ingredients, acetic acid (AcOH) and sulfolane are also released in the order of their volatility. Above 300 C, an oxidative thermal degradation of UreaSil-type host matrices is indicated by the occurrence of, among others, formaldehyde or ammonia for electrolyte samples P2000 and P230, respectively. Evolution of various alkyl iodides with short chain length has only been detected by the mass spectroscopic evolved gas analysis method only.

KW - Dye-sensitized solar cells

KW - Evolved gas analyses

KW - Hybrid materials

KW - Quasi-solid state electrolytes

KW - TG-EGA-FTIR gas cell

KW - TG/DTA-EGA-MS

KW - Thermogravimetry

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JO - Journal of Thermal Analysis and Calorimetry

JF - Journal of Thermal Analysis and Calorimetry

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IS - 3

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