Influence of the 3D architecture and surface roughness of SiOC anodes on bioelectrochemical system performance: a comparative study of freeze-cast, 3D-printed, and tape-cast materials with uniform composition

IF 3.6 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials for Renewable and Sustainable Energy Pub Date : 2024-02-05 DOI:10.1007/s40243-023-00253-4

Pedro Henrique da Rosa Braun, Anne Kuchenbuch, Bruno Toselli, Kurosch Rezwan, Falk Harnisch, Michaela Wilhelm

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Abstract

3D-printed anodes for bioelectrochemical systems are increasingly being reported. However, comparisons between 3D-printed anodes and their non-3D-printed counterparts with the same material composition are still lacking. In addition, surface roughness parameters that could be correlated with bioelectrochemical performance are rarely determined. To fill these gaps, slurries with identical composition but different mass fractions were processed into SiOC anodes by tape-casting, freeze-casting, or direct-ink writing. The current generation was investigated using electroactive biofilms enriched with Geobacter spp. Freeze-cast anodes showed more surface pores and the highest surface kurtosis of 5.7 ± 0.5, whereas tape-cast and 3D-printed anodes showed a closed surface porosity. 3D-printing was only possible using slurries 85 wt% of mass fraction. The surface pores of the freeze-cast anodes improved bacterial adhesion and resulted in a high initial (first cycle) maximum current density per geometric surface area of 9.2 ± 2.1 A m⁻². The larger surface area of the 3D-printed anodes prevented pore clogging and produced the highest current density per geometric surface area of 12.0 ± 1.2 A m⁻². The current density values of all anodes are similar when the current density is normalized over the entire geometric surface as determined by CT-scans. This study highlights the role of geometric surface area in normalizing current generation and the need to use more surface roughness parameters to correlate anode properties, bacterial adhesion, and current generation.

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SiOC 阳极的三维结构和表面粗糙度对生物电化学系统性能的影响：成分均匀的冷冻铸造、三维打印和胶带铸造材料的比较研究

用于生物电化学系统的三维打印阳极的报道越来越多。然而，三维打印阳极与具有相同材料成分的非三维打印阳极之间仍然缺乏比较。此外，与生物电化学性能相关的表面粗糙度参数也很少确定。为了填补这些空白，我们采用胶带浇铸、冷冻浇铸或直接墨水写入等方法将成分相同但质量分数不同的浆料加工成 SiOC 阳极。冷冻铸造阳极显示出更多的表面孔隙和最高的表面峰度（5.7 ± 0.5），而胶带铸造和三维打印阳极则显示出封闭的表面孔隙率。只有使用质量分数为 85% 的浆料才能进行 3D 打印。冷冻铸造阳极的表面孔隙提高了细菌的附着力，并使单位几何表面积的初始（第一周期）最大电流密度达到 9.2 ± 2.1 A m-2。三维打印阳极的表面积更大，可防止孔隙堵塞，产生的单位几何表面积最高电流密度为 12.0 ± 1.2 A m-2。根据 CT 扫描确定的整个几何表面的电流密度归一化后，所有阳极的电流密度值相似。这项研究强调了几何表面积在归一化电流产生中的作用，以及使用更多表面粗糙度参数来关联阳极特性、细菌附着和电流产生的必要性。

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来源期刊

Materials for Renewable and Sustainable Energy MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.90

自引率

2.20%

发文量

审稿时长

13 weeks

期刊介绍： Energy is the single most valuable resource for human activity and the basis for all human progress. Materials play a key role in enabling technologies that can offer promising solutions to achieve renewable and sustainable energy pathways for the future. Materials for Renewable and Sustainable Energy has been established to be the world''s foremost interdisciplinary forum for publication of research on all aspects of the study of materials for the deployment of renewable and sustainable energy technologies. The journal covers experimental and theoretical aspects of materials and prototype devices for sustainable energy conversion, storage, and saving, together with materials needed for renewable fuel production. It publishes reviews, original research articles, rapid communications, and perspectives. All manuscripts are peer-reviewed for scientific quality. Topics include: 1. MATERIALS for renewable energy storage and conversion: Batteries, Supercapacitors, Fuel cells, Hydrogen storage, and Photovoltaics and solar cells. 2. MATERIALS for renewable and sustainable fuel production: Hydrogen production and fuel generation from renewables (catalysis), Solar-driven reactions to hydrogen and fuels from renewables (photocatalysis), Biofuels, and Carbon dioxide sequestration and conversion. 3. MATERIALS for energy saving: Thermoelectrics, Novel illumination sources for efficient lighting, and Energy saving in buildings. 4. MATERIALS modeling and theoretical aspects. 5. Advanced characterization techniques of MATERIALS Materials for Renewable and Sustainable Energy is committed to upholding the integrity of the scientific record. As a member of the Committee on Publication Ethics (COPE) the journal will follow the COPE guidelines on how to deal with potential acts of misconduct. Authors should refrain from misrepresenting research results which could damage the trust in the journal and ultimately the entire scientific endeavor. Maintaining integrity of the research and its presentation can be achieved by following the rules of good scientific practice as detailed here: https://www.springer.com/us/editorial-policies