Customizable design strategies for high-performance bioanodes in bioelectrochemical systems
Yu-Ting He,
Qian Fu,
Yuan Pang,
Qing Li,
Jun Li,
Xun Zhu,
Ren-Hao Lu,
Wei Sun,
Qiang Liao,
Uwe Schröder
Affiliations
Yu-Ting He
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Qian Fu
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China; Corresponding author
Yuan Pang
Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Haidian District, Beijing 100084, China; Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing 100084, China; Corresponding author
Qing Li
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Jun Li
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Xun Zhu
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Ren-Hao Lu
Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Haidian District, Beijing 100084, China; Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing 100084, China
Wei Sun
Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Haidian District, Beijing 100084, China; Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing 100084, China
Qiang Liao
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Uwe Schröder
Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Braunschweig 38106, Germany
Summary: Bioelectrochemical systems (BESs) can fulfill the demand for renewable energy and wastewater treatment but still face significant challenges to improve their overall performance. Core efforts have been made to enhance the bioelectrode performance, yet, previous approaches are fragmented and have limited applicability, unable to flexibly adjust physicochemical and structural properties of electrodes for specific requirements in various applications. Here, we propose a facile electrode design strategy that integrates three-dimensional printing technology and functionalized modular electrode materials. A customized graphene-based electrode with hierarchical pores and functionalized components (i.e., ferric ions and magnetite nanoparticles) was fabricated. Owing to efficient mass and electron transfer, a high volumetric current density of 10,608 ± 1,036 A/m3 was achieved, the highest volumetric current density with pure Geobacter sulfurreducens to date. This strategy can be readily applied to existing BESs (e.g., microbial fuel cells and microbial electrosynthesis) and provide a feasibility for practical application.
