#TITLE_ALTERNATIVE#

• Main Author: NATALIA JORIS (NIM : 20512019) ; Pembimbing Prof. Dr. Djulia Onggo, SHIELDA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19464
• Institution: Institut Teknologi Bandung

Fuel cell is an electrochemical cell which can convert the chemical energy of a <br /> <br /> <br /> <br /> <br /> fuel to electrical energy. Its components must be consist of carbon material that <br /> <br /> <br /> <br /> <br /> can conduct the electron. Multi-Walled Carbon Nanotubes (MWCNT) is nano <br /> <br /> <br /> <br /> <br /> size carbon material which can conduct electron efficiently in fuel cell <br /> <br /> <br /> <br /> <br /> components. The usesnof nta-de-coco as proton exchange membrane need to <br /> <br /> <br /> <br /> <br /> improve by adding MWCNT as electron conductor inside nata-de-coco <br /> <br /> <br /> <br /> <br /> membrane. Optimizing of MWCNT insertion is needed to improve the fuel cell <br /> <br /> <br /> <br /> <br /> efficiency. Insertion of MWCNT is influenced by types and amounts of surfactant <br /> <br /> <br /> <br /> <br /> also the amount of MWCNT dispersed. The result indicates that the surfactant <br /> <br /> <br /> <br /> <br /> Cetyltrimethyl Ammonium Bromide (CTAB) has higher capability to disperse <br /> <br /> <br /> <br /> <br /> MWCNT in water compared to Sodium Dodecyl Sulfate (SDS). The result was <br /> <br /> <br /> <br /> <br /> obtained from visual observations and MWCNT solution absorbance which <br /> <br /> <br /> <br /> <br /> measured at wavelength of 255 nm. The dispersion was used to immerse nata-decoco <br /> <br /> <br /> <br /> <br /> gel for certain time and then the gel was dried to form a thin membrane. The <br /> <br /> <br /> <br /> <br /> optimum of MWCNT insertion was found from electrical conductivity of the <br /> <br /> <br /> <br /> <br /> nata-de-coco containing MWCNT membrane by four points probes method <br /> <br /> <br /> <br /> <br /> measurement. The optimum electrical conductivity of MWCNT insertion in natade- <br /> <br /> <br /> <br /> <br /> coco obtained is 0,19 S/cm at concentration of MWCNT dispersion 0.35 g/100 <br /> <br /> <br /> <br /> <br /> mL of water containing 0.35 g of CTAB after 1 hour soaking time. The electrical <br /> <br /> <br /> <br /> <br /> conductivity values increased to maximum value 1.21 S/cm after six days <br /> <br /> <br /> <br /> <br /> immersion. The results of this study are relatively higher than some previous <br /> <br /> <br /> <br /> <br /> researcher results that obtain about 10-1 S/cm. The average number of MWCNT <br /> <br /> <br /> <br /> <br /> inserted into nata-de-coco for one hour soaking time is 0.6 mg/cm2 which found <br /> <br /> <br /> <br /> <br /> from residual calculation through TGA measurement. The distribution of <br /> <br /> <br /> <br /> <br /> MWCNT particles inside nata-de-coco seems to be spread homogeneously. This <br /> <br /> <br /> <br /> <br /> distribution was observed by SEM image analysis.