PVDF-Modified Nafion Membrane for Improved Performance of MFC

Area of Science:

• Electrochemistry
• Environmental Engineering
• Materials Science

Background:

• Microbial fuel cells (MFCs) face challenges with low power production and unstable power supply, limiting their practical application.
• Effective strategies are needed to enhance MFC performance for energy generation and wastewater treatment.

Purpose of the Study:

• To investigate the impact of modified proton exchange membranes on MFC performance.
• To evaluate the potential of polyvinylidene fluoride (PVDF) and acetone-modified PVDF for improving MFC power generation and stability.

Main Methods:

• An MFC system was constructed using molasses wastewater as fuel and carbon felt as the electrode.
• Nafion membranes were modified with PVDF and acetone-modified PVDF to assess their effects on MFC performance.
• Output voltage and Chemical Oxygen Demand (COD) removal rates were measured to evaluate MFC efficiency.

Main Results:

• PVDF-modified membranes improved water absorption, leading to increased power generation and better wastewater treatment.
• Acetone-modified PVDF further enhanced the stability of the MFC's output power.
• The MFC with an acetone-modified PVDF membrane achieved a steady output voltage over 0.21 V and a COD removal rate of approximately 66.7%.

Conclusions:

• Membrane modification with acetone-modified PVDF significantly increases MFC output voltage and improves the stability of electrical energy output.
• This modification offers a promising approach to overcome MFC limitations and enhance their efficiency for power production and bioremediation.