Publicação
Fabric based supercapacitors towards wearable applications
| Resumo: | Nowadays, the constant need to obtain energy from renewable energies demands a high range of devices capable of storing energy. Comparing renewable energy to non-renew- able energy, the ability to store energy is very important due to the lack of continuity of en- ergy generation. The use of supercapacitors is a great opportunity to obtain a storage device capable of supplying small electronic devices with properties such as high flexibility and per- meability, which allow these components to be integrated in wearable technologies. Some supercapacitors were already developed, showing the potential to be used as en- ergy storage devices, using carbon yarns as electrodes and SSS as electrolyte, providing the desired properties for these devices to be used in wearable technologies. In this thesis re- search was conducted to study the potential of using commercial carbon yarns as a substrate to obtain electrodes with different active materials, for instance copper and copper iodide, to use in fiber-based supercapacitors. These materials were analyzed trough optical microscopy to understand the material's adhesion, Raman spectroscopy for elemental characterization, Cyclic voltammetry to obtain the electrochemical information needed to seek the potential of these samples, from both 3-electrode analysis (isolated electrode behavior) and 2-electrode setup to evaluate a fully constructed supercapacitor when subjected to different potential windows and scan-rates. The result of this thesis provides alternatives to the prepare electrodes for fiber-shaped supercapacitors towards wearable technologies, expanding the range of characteristic prop- erties and therefore, make these devices more desirable to use in this mean. Supercapacitor behavior was found using devices with both electrodes, even with some problems regarding electrode stability due to the irreversible reactions occurring during the potential sweep, hav- ing the electrode coating react with the electrolyte. |
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| Autores principais: | Oliveira, Eduardo Varandas |
| Assunto: | fiber-shaped Supercapacitor wearable technology electronic textiles |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | Nowadays, the constant need to obtain energy from renewable energies demands a high range of devices capable of storing energy. Comparing renewable energy to non-renew- able energy, the ability to store energy is very important due to the lack of continuity of en- ergy generation. The use of supercapacitors is a great opportunity to obtain a storage device capable of supplying small electronic devices with properties such as high flexibility and per- meability, which allow these components to be integrated in wearable technologies. Some supercapacitors were already developed, showing the potential to be used as en- ergy storage devices, using carbon yarns as electrodes and SSS as electrolyte, providing the desired properties for these devices to be used in wearable technologies. In this thesis re- search was conducted to study the potential of using commercial carbon yarns as a substrate to obtain electrodes with different active materials, for instance copper and copper iodide, to use in fiber-based supercapacitors. These materials were analyzed trough optical microscopy to understand the material's adhesion, Raman spectroscopy for elemental characterization, Cyclic voltammetry to obtain the electrochemical information needed to seek the potential of these samples, from both 3-electrode analysis (isolated electrode behavior) and 2-electrode setup to evaluate a fully constructed supercapacitor when subjected to different potential windows and scan-rates. The result of this thesis provides alternatives to the prepare electrodes for fiber-shaped supercapacitors towards wearable technologies, expanding the range of characteristic prop- erties and therefore, make these devices more desirable to use in this mean. Supercapacitor behavior was found using devices with both electrodes, even with some problems regarding electrode stability due to the irreversible reactions occurring during the potential sweep, hav- ing the electrode coating react with the electrolyte. |
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