Abstract Ceramic-derived components in microbial fuel cells (MFCs) aim to substitute Nafion 117. Ceramic membranes are a cheaper alternative and powders’ tailoring has beneficial flexibility for proper surface morphology, porosity, controlled permeability, and water uptake. In this work, differently from the fine fired ceramics or clay materials, barium-cerium-gadolinium oxides (BCGO) powders, co-doped with lithium (Li) or cobalt (Co), are synthesized at a low temperature and then sintered at 1400 and 1500 °C to form the ceramic surface. Results show that the pore size is always within a few microns, porosity can be varied greatly with firing temperature at fixed dwell time, and the use of Li or Co can give smooth or corrugated porous particles, respectively. The permeability tests show that the BCGO doped with Li cannot control the water flux from yeast extract-peptone- d -glucose medium (YPD) with the yeast, and the absolute amount of biofouling is higher than that of Nafion 117. BCGO doped with 5 mol% Co exhibits good permeability and lowers absolute biofouling due to the unique surface morphology of parent powders. Thus, the ceramic separators based on BCGO doped with Co can be an attractive alternative to expensive Nafion.

中文翻译：

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用于酵母基微生物燃料电池的钙钛矿陶瓷膜分离器具有更高的抗生物污染性

摘要 微生物燃料电池 (MFC) 中的陶瓷衍生成分旨在替代 Nafion 117。陶瓷膜是一种更便宜的替代品，并且粉末的定制对于适当的表面形态、孔隙率、可控的渗透性和吸水率具有有益的灵活性。在这项工作中，与精细烧制的陶瓷或粘土材料不同，钡铈钆氧化物 (BCGO) 粉末与锂 (Li) 或钴 (Co) 共掺杂，在低温下合成，然后在 1400和 1500 °C 形成陶瓷表面。结果表明，孔径始终在几微米以内，在固定的停留时间下，孔隙率会随着焙烧温度的变化而发生很大变化，并且使用 Li 或 Co 可以分别得到光滑或波纹状的多孔颗粒。渗透性测试表明，掺杂Li的BCGO不能控制酵母提取物-蛋白胨-d-葡萄糖培养基（YPD）与酵母的水通量，生物污垢的绝对量高于Nafion 117。掺杂5的BCGO由于母粉独特的表面形态，mol% Co 表现出良好的渗透性并降低绝对生物污垢。因此，基于 BCGO 掺杂 Co 的陶瓷隔膜可以成为昂贵的 Nafion 的有吸引力的替代品。