PVDF-Modified Nafion Membrane for Improved Performance of MFC

Abstract

Low power production and unstable power supply are important bottlenecks restricting the application of microbial fuel cells (MFCs). It is necessary to explore effective methods to improve MFC performance. By using molasses wastewater as fuel, carbon felt as an electrode, and the mixture of K3[Fe(CN)6] and NaCl as a catholyte, an MFC experimental system was set up to study the performance of MFCs with three different proton exchange membranes. A Nafion membrane was used as the basic material, and polyvinylidene fluoride (PVDF) and acetone-modified PVDF were used to modify it, respectively. The experimental results show that a PVDF-modified membrane can improve the water absorption effectively and, thus, make the MFC have greater power generation and better wastewater treatment effect. The acetone-modified PVDF can further improve the stability of output power of the MFC. When the acetone-modified PVDF was used to modify the Nafion membrane, the steady output voltage of the MFC was above 0.21 V, and the Chemical Oxygen Demand (COD) removal rate for molasses wastewater was about 66.7%, which were 96.3% and 75.1% higher than that of the MFC with the ordinary Nafion membrane. Membrane modification with acetone-modified PVDF can not only increase the output voltage of the MFC but also improve the stability of its output electrical energy.

Development of a Novel Composite Polymer Electrolyte Membrane for Application as a Separator in a Dual Chamber Microbial Fuel Cell

“…PVA-kC and Nafion have the highest oxygen permeability and lower proton mass transfer compared to VPC and IPC membranes. It has been reported that enhancing the hydrophilicity of the Nafion membrane with PVDF coating decreased the charge-transfer resistance of the MFC as compared to the bare Nafion membrane . Both VPC and IPC have higher water absorptions and can lead to efficient proton conduction through these membranes.…”

Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

“…weight. The porosity ( ɛ ) of individual fibers was subsequently calculated utilizing Equation (1) [ 58 , 59 ]. where ɛ is the membrane porosity (%), ρ w is the density of water, M w is the weight of wet membrane, M d is the weight of dry membrane, and V is the volume of the membrane specimen.…”

“…weight. The porosity (ε) of individual fibers was subsequently calculated utilizing Equation 1 [58,59].…”

Kinerja Pembangkit Biolistrik Salt Bridge Mirrobial Fuel Cell Variasi Rasio Karagenan-Karboksimetil Selulosa

“…Mediator penukar proton dapat berupa membran atau jembatan garam (salt bridge). Membran penukar proton yang digunakan umumnya adalah nafion (Fan et al, 2020) dan CMI-7000 (Di Palma et al, 2020). Membran tersebut mempunyai harga yang sangat mahal serta harus diimpor.…”