Frattini, Domenico Accardo, Grazia Duarte, Kimberley D. Z. Kim, Do-Heyoung Kwon, Yongchai 2024-01-19T18:02:07Z 2024-01-19T18:02:07Z 2021-08-31 2020-03-01 0306-2619 https://pubs.kist.re.kr/handle/201004/118878 Low cost graphite-cement composite (GC70S) is prepared by blending graphite, cement and fumed SiO2 to obtain nanoflowers and proposed as an alternative to common carbon-based materials in the anode of biodevices with biofilm growth. The selected anodic benchmarks are carbon felt (CF) that is cheap, flexible, porous, and conductive three-dimensional support and a modified CF with polyethyleneimine (CF-PEI), where PEI is used to coat the carbon fibers. In spite of such advantages, CF has drawbacks, such as deformation by pore compression, hydrophobicity, low biofilm adhesion, and easy fragility by aging. Compared to these benchmarks, the GC70S has a multi-modal pore size distribution with micro (1-7 mu m) and nano (20 nm) pores, whereas CF and CF-PEI only show macroscopic (55-60 mu m) pores. The comparative results also show that the new composite provides better wettability, higher specific surface area (4.53.107 m(2).m(-3)), and good electrical conductivity (2.04 +/- 0.18 S.m(-1)). In half-cell tests, the yeast biofilm is firmly attached to GC70S anode, while its charge transfer resistance is greatly reduced. From the biofilm resistance contribution, the inhabitancy appears more abundant than in CF or CF-PEI. English ELSEVIER SCI LTD MICROBIAL FUEL-CELLS THERMAL-PROPERTIES PERFORMANCE HYDRATION FABRICATION MORPHOLOGY ELECTRODE MEMBRANE GRAPHENE ENERGY Improved biofilm adhesion and electrochemical properties of a graphite-cement composite with silica nanoflowers versus two benchmark carbon felts Article 10.1016/j.apenergy.2019.114391 1 APPLIED ENERGY, v.261 APPLIED ENERGY 261 scie scopus 000515117500060 2-s2.0-85076670280 Energy & Fuels Engineering, Chemical Energy & Fuels Engineering Article MICROBIAL FUEL-CELLS THERMAL-PROPERTIES PERFORMANCE HYDRATION FABRICATION MORPHOLOGY ELECTRODE MEMBRANE GRAPHENE ENERGY Anode Biofilm Carbon felt Cement Graphite yeast-MFC