旭硝子財団助成研究成果報告2019

76/88

Stephan Thierry Dubas100101JiaqianQin102Kreangkrai ManeeintrDevelopment of composite polyelectrolyte complex LDH/graphene membrane for supercapacitors (Project 2018)Wearable woven supercapacitor fabrics with high energy density (Project 2018)Coal Waste Utilization for Soil Amendment for Chulalongkorn University Saraburi Campus Area (Project 2018)72旭硝子財団　助成研究成果報告（2019）The development of new energy device is a worldwide race and indeed a very competitive area of research. In this area, the development of new composite membrane is a challenge several aspect can still be improved for example, higher capacity membranes, more durable, cheaper or easier to process. The polyelectrolytes com-plexe membranes we are proposing here do not probably have the best efficiency but they can be made very cheap and are flexible and quite robust. Based on these fact, we proposed a study of supercapacitor electrode composites based on manganese oxide and graphite. The physical properties of the composite pec have been studied using electron microscopy, dynamic mechanical analysis and the electrochemical performance was evaluated byt cyclic voltametry and impedance spectroscopy. Although the final membranes displaye somewhat moderate properties (70 farad/gram of membrane) the knowledge obtain during this project is most valuable. Flexible power sources with load bearing capability are attractive for modern wearable electronics. Wearable electronics require the implementation of electronic functions on a flexible, wearable substrate. Cotton textiles are the most widely used natural fibers for soft and breathable clothing. However, textile based energy devices are still lacking because of the poor conductivity. In this work, the conductive cotton textile was successfully fabricated by screen printing method. The prepared conductive cotton textile can be directly applied as current collector of supercapacitor. The activated materials can be coated on the conductive cotton textile, which can be applied to be the electrode for supercapacitor.Recently, coal is one of the main energy sources. From a coal-combustion process, a huge amount of coal-waste such as bottom ash is generated. The most common method for disposal is a landfill which creates the environmental problems. However, the coal-waste utilization like soil amendment is a better way to manage the waste to reduce the environmental impacts and to increase the profit for the manufacturers. Therefore, the objectives of this study are to measure the properties of soil from Saraburi mixed with bottom ash to improve the soil quality by growing chili, and to compare the results with the original soil. The operating parameters of this study are the compositions of coal-waste mixed with soil ranging from 0 to 30%wt. Furthermore, the ef-fects on pH, bulk density and soil texture are also studied. From the results, 10%wt bottom ash can help grow-ing the plants with the better results.