1. Performance of titanium–nickel (Ti/Ni) and graphite felt-nickel (GF/Ni) electrodeposited by Ni as alternative cathodes for microbial fuel cells
- Author
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Wan Ramli Wan Daud, Mahendra Rao Somalu, Mimi Hani Abu Bakar, Byung Hong Kim, Mostafa Ghasemi, Sharifah Najiha Timmiati, Tahereh Jafary, and Ibdal Satar
- Subjects
Materials science ,Microbial fuel cell ,Scanning electron microscope ,General Chemical Engineering ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Cathode ,0104 chemical sciences ,Catalysis ,law.invention ,Nickel ,Chemical engineering ,chemistry ,law ,Electrode ,Graphite ,0210 nano-technology ,Titanium - Abstract
Electrodes are important components of bioelectrochemical systems (BESs), such as the microbial fuel cells (MFCs). The low-cost cathodes of titanium–nickel (Ti/Ni) and graphite felt-nickel (GF/Ni) are important to be evaluated as cathodes for MFCs. In this study, Ni particles are deposited onto the Ti and GF surface using a simple and low-cost electrodeposition technique. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to analyse the cathode surfaces. The electrodeposition of Ni onto GF appears more uniform without significant agglomeration compared with that onto Ti. This uniform deposition is perhaps the reason for a higher maximum power density (Pmax), lower internal resistance (Rin) and higher Columbic efficiency (CE) for MFC with GF/Ni cathode (113.4 ± 0.6 mW/m2, 1264.4 Ω and 29.6%, respectively) than those measured with Ti/Ni cathode (110.7 ± 8.0 mW/m2, 3375.8 Ω and 23.7%, respectively). However, the performance of these cathodes remains lower compared with the GF/Pt cathode (140.0 mW/m2, 845.7 Ω and 42.0%, respectively). Based on the preparation technique, material cost and performance, both Ti/Ni and GF/Ni cathodes can be considered as alternative to Pt catalyst for MFC application.
- Published
- 2018