Simulation of OH- and oxygen transport in the air-cathode catalyst layer of microbial fuel cells

被引：3
作者：
Cai, Wenfang [1 ]
Geng, Jiafeng [4 ]
Zhao, Shifeng [2 ]
Zhu, Yucheng [3 ]
Wang, Yunhai [3 ]
Chen, Qingyun [2 ]
Guo, Kun [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
[4] Changan Univ, Sch Water & Environm, Dept Chem Engn, Xian 710054, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2023年 / 151卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Air-cathode MFC; Catalyst layer; Mass transfer; OH-; transport; REDUCTION REACTION; CARBON; PERFORMANCE; THICKNESS; MODEL;
D O I：
10.1016/j.elecom.2023.107494
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The mass transfer of OH- and oxygen within an air-cathode is critical for the performance of microbial fuel cells (MFCs). Improving the understanding of this complex transportation mechanism could help guide the design of air-cathodes to enhance the power density of MFCs. Herein, a 2D-agglomerate model is developed to study OH- and O2 transfer, and electrochemical performance within an air-cathode MFC. The effects of key variables (binder volume fraction, and Pt/carbon mass ratio) on OH- and oxygen transport behavior have been investi-gated. Simulation results reveal that the OH- and oxygen concentrations within the catalyst layer are closely related to the catalyst layer structure. A lower volume fraction of Nafion (R) binder is beneficial to OH- and oxygen transfer, while the Pt/carbon mass ratio has complex effects on OH- and oxygen transfer and reactions. This work aims to improve our understanding of OH- and oxygen mass transfer and offers an effective approach to con-structing high-performance air-cathode MFCs.
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页数：7
相关论文
共 34 条
[1]  
Bothe D., 2011, PROGR NONLINEAR DIFF, V80, P81, DOI DOI 10.1007/978-3-0348-0075-45
[2]   Modelling the PEM fuel cell cathode [J].
Broka, K ;
Ekdunge, P .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (03) :281-289
[3]   Calculation of various physics constants in heterogenous substances I Dielectricity constants and conductivity of mixed bodies from isotropic substances [J].
Bruggeman, DAG .
ANNALEN DER PHYSIK, 1935, 24 (07) :636-664
[4]   Investigation of a two-dimensional model on microbial fuel cell with different biofilm porosities and external resistances [J].
Cai, Wen-Fang ;
Geng, Jia-Feng ;
Pu, Kai-Bo ;
Ma, Qian ;
Jing, Deng-Wei ;
Wang, Yun-Hai ;
Chen, Qing-Yun ;
Liu, Hong .
CHEMICAL ENGINEERING JOURNAL, 2018, 333 :572-582
[5]   The Influence of Catalyst Layer Thickness on the Performance and Degradation of PEM Fuel Cell Cathodes with Constant Catalyst Loading [J].
Darab, Mandi ;
Barnett, Alejandro Oyarce ;
Lindbergh, Goran ;
Thomassen, Magnus Skinlo ;
Sunde, Svein .
ELECTROCHIMICA ACTA, 2017, 232 :505-516
[6]   Analysis and Improvement of a Scaled-Up and Stacked Microbial Fuel Cell [J].
Dekker, Arjan ;
Ter Heijne, Annemiek ;
Saakes, Michel ;
Hamelers, Hubertus V. M. ;
Buisman, Cees J. N. .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2009, 43 (23) :9038-9042
[7]   Pore-scale modeling of oxygen transport in the catalyst layer of air-breathing cathode in membraneless microfluidic fuel cells [J].
Fu, Ya-Lu ;
Zhang, Biao ;
Zhu, Xun ;
Ye, Ding-Ding ;
Sui, Pang-Chieh ;
Djilali, Ned .
APPLIED ENERGY, 2020, 277 (277)
[8]   Effect of electrolyte pH on the rate of the anodic and cathodic reactions in an air-cathode microbial fuel cell [J].
He, Zhen ;
Huang, Yuelong ;
Manohar, Aswin K. ;
Mansfeld, Florian .
BIOELECTROCHEMISTRY, 2008, 74 (01) :78-82
[9]   Enhanced power generation in a single-chamber dynamic membrane microbial fuel cell using a nonstructural air-breathing activated carbon fiber felt cathode [J].
Li, Xinyang ;
Liu, Guicheng ;
Ma, Fujun ;
Sun, Shaobin ;
Zhou, Siyu ;
Ardhi, Ryanda Enggar Anugrah ;
Lee, Joong Kee ;
Yao, Hong .
ENERGY CONVERSION AND MANAGEMENT, 2018, 172 :98-104
[10]   Cross-dimensional model of the oxygen transport behavior in low-Pt proton exchange membrane fuel cells [J].
Liang, Jiarong ;
Li, Yinshi ;
Wang, Rui ;
Jiang, Jinghui .
CHEMICAL ENGINEERING JOURNAL, 2020, 400
1234