Chen, Xuepeng, et al. Journal of Power Sources 480 (2020): 228789.
The anode performance of microbial fuel cells (MFCs) is an important factor affecting their power generation performance. Relatively weak microbial attachment remains a bottleneck for further improving the electrocatalytic activity of the anode. In this paper, a novel biocompatible β-cyclodextrin (β-CD)/polyquaternary ammonium-11 (PQ-11) composite was coupled with collector carbon (CC) as the negative electrode material for MFCs. The maximum power density of CC-CD-PQ-11 anode was 1754.1±54.0 mW m-2, which was 5.2 times and 1.4 times that of CC (340.2±15.0 mW m-2-2-2 during a 5-min interruption time.
Preparation of CC-Cd-PQ-11 Electrode
1. The anode substrate was a 2 cm × 2 cm carbon cloth with a thickness of 0.36 ± 0.02 mm. Before use, the carbon cloth was purified by soaking in acetone and ethanol solutions for 3 h, respectively, to remove residual impurities.
2. Then, the carbon cloth was ultrasonically rinsed with deionized water for 15 min and dried in an oven at 60 °C. The obtained carbon cloth electrode was recorded as CC.
3. β-Cyclodextrin (β-CD, 400 mg) was dispersed in 100 mL of deionized water and stirred for 1 h, and then the purified CC electrode was soaked in the β-CD solution at room temperature for 3 h and dried in an oven at 60 °C to obtain a CC-CD electrode.
4. 20 mL of PQ-11 was added to 100 mL of deionized water and stirred for 1 h to prepare a polyquaternium-11 (PQ-11) solution, and the PQ-11 solution was mixed with the β-CD solution to prepare a β-CD/PQ-11 mixture.
5. Then, the purified CC electrode was immersed in the mixture for 3 h and then dried in an oven at 60 °C to obtain the CC-CD-PQ-11 electrode.
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