Details
| Original language | English |
|---|---|
| Article number | 1138 |
| Journal | SN Applied Sciences |
| Volume | 2 |
| Issue number | 6 |
| Early online date | 29 May 2020 |
| Publication status | Published - 29 May 2020 |
| Externally published | Yes |
Abstract
Abstract: The main target of this work was to investigate the influence of the hardeners on the properties of the prepared supercapacitors named geopolymer cements. The supercapacitors were obtained by mixing an aluminosilicate source (metakaolin) and hardeners (sodium waterglass or phosphoric acid solution). The obtained supercapacitors were characterized by measuring the compressive strengths, infrared spectroscopy and scanning electron microscope. The electrochemical properties of the prepared supercapacitors were carried out by cyclic voltammetry and electrochemical impedance spectroscopy. The obtained results show that the compressive strengths of geopolymer cements from sodium waterglass and phosphoric acid solution are 43.50 and 66.12 MPa, respectively. The micrograph images indicate that both supercapacitors are compact, homogeneous and denser matrix. It appears that the supercapacitors from acidic medium have a lower internal resistance (45 kΩ), i.e. higher ionic conductivity, whereas, the one from alkaline medium indicates the higher value of the internal resistance (450 kΩ). It was typically found that the geopolymer cements from acidic medium have a higher electrical conductivity making it a potential electrode material for structural supercapacitor compared to the one obtained in alkaline medium. Graphic abstract: [Figure not available: see fulltext.]
Keywords
- Internal resistance, Metakaolin, Phosphoric acid, Sodium waterglass, Supercapacitors
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
- Environmental Science(all)
- General Environmental Science
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemical Engineering(all)
- General Chemical Engineering
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: SN Applied Sciences, Vol. 2, No. 6, 1138, 29.05.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Utilization of geopolymer cements as supercapacitors
T2 - influence of the hardeners on their properties
AU - Pengou, Martin
AU - Ngouné, Bertrand
AU - Tchakouté, Hervé K.
AU - Nanseu, Charles P.N.
AU - Ngameni, Emmanuel
PY - 2020/5/29
Y1 - 2020/5/29
N2 - Abstract: The main target of this work was to investigate the influence of the hardeners on the properties of the prepared supercapacitors named geopolymer cements. The supercapacitors were obtained by mixing an aluminosilicate source (metakaolin) and hardeners (sodium waterglass or phosphoric acid solution). The obtained supercapacitors were characterized by measuring the compressive strengths, infrared spectroscopy and scanning electron microscope. The electrochemical properties of the prepared supercapacitors were carried out by cyclic voltammetry and electrochemical impedance spectroscopy. The obtained results show that the compressive strengths of geopolymer cements from sodium waterglass and phosphoric acid solution are 43.50 and 66.12 MPa, respectively. The micrograph images indicate that both supercapacitors are compact, homogeneous and denser matrix. It appears that the supercapacitors from acidic medium have a lower internal resistance (45 kΩ), i.e. higher ionic conductivity, whereas, the one from alkaline medium indicates the higher value of the internal resistance (450 kΩ). It was typically found that the geopolymer cements from acidic medium have a higher electrical conductivity making it a potential electrode material for structural supercapacitor compared to the one obtained in alkaline medium. Graphic abstract: [Figure not available: see fulltext.]
AB - Abstract: The main target of this work was to investigate the influence of the hardeners on the properties of the prepared supercapacitors named geopolymer cements. The supercapacitors were obtained by mixing an aluminosilicate source (metakaolin) and hardeners (sodium waterglass or phosphoric acid solution). The obtained supercapacitors were characterized by measuring the compressive strengths, infrared spectroscopy and scanning electron microscope. The electrochemical properties of the prepared supercapacitors were carried out by cyclic voltammetry and electrochemical impedance spectroscopy. The obtained results show that the compressive strengths of geopolymer cements from sodium waterglass and phosphoric acid solution are 43.50 and 66.12 MPa, respectively. The micrograph images indicate that both supercapacitors are compact, homogeneous and denser matrix. It appears that the supercapacitors from acidic medium have a lower internal resistance (45 kΩ), i.e. higher ionic conductivity, whereas, the one from alkaline medium indicates the higher value of the internal resistance (450 kΩ). It was typically found that the geopolymer cements from acidic medium have a higher electrical conductivity making it a potential electrode material for structural supercapacitor compared to the one obtained in alkaline medium. Graphic abstract: [Figure not available: see fulltext.]
KW - Internal resistance
KW - Metakaolin
KW - Phosphoric acid
KW - Sodium waterglass
KW - Supercapacitors
UR - http://www.scopus.com/inward/record.url?scp=85100815665&partnerID=8YFLogxK
U2 - 10.1007/s42452-020-2939-1
DO - 10.1007/s42452-020-2939-1
M3 - Article
AN - SCOPUS:85100815665
VL - 2
JO - SN Applied Sciences
JF - SN Applied Sciences
IS - 6
M1 - 1138
ER -