Simulation-guided design of a finger-like nickel-based anode for enhanced performance of direct carbon solid oxide fuel cells
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-12-15
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en
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11
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Ceramics International, Volume 49, issue 24, pp. 40942-40952
Abstract
Direct carbon solid oxide fuel cells (DC-SOFCs) can convert solid carbon directly to electricity via electrochemical oxidation and require less investment compared to other liquid or gas-fed fuel cells. Anode characteristic is one of the important factors in achieving efficient and stable operation of DC-SOFCs. In this work, we have successfully designed and developed 2D multi-physics field models for DC-SOFCs with finger-like nickel-based anode (Cell-A) and traditional nickel-based anode (Cell-B), respectively. Simulation results revealed that the cell performance was significantly enhanced with increases in the anode porosity and decreases in the distance of carbon fuel to porous anode. More importantly, the anode featuring a finger-like pore structure assumed a pivotal role in cell performance. Specifically, Cell-A exhibited higher electrochemical performance compared to Cell-B due to the lower resistance for gas transport and more abundant amount of three-phase boundaries for electrochemical reactions. Experimental results verified the simulation findings by making and operating these two DC-SOFCs. The fabricated Cell-A with finger-like anode delivered higher power output of 858 and 371 mW cm−2 at 850 °C when fueled with hydrogen and activated carbon, respectively, relative to Cell-B with traditional anode. The beneficial characteristic of finger-like anode was further demonstrated by the ability of Cell-A to retain stable operation for 14.1 h at 100 mA with the fuel utilization of 15.8% at 850 °C. This study provides important guidance for the design and improvement of DC-SOFCs, and promotes the sustainable utilization of carbon resources.Description
Funding Information: The authors would like to thank the National Natural Science Foundation of China ( 21908133 and 21978157 ), SDUT & Zhangdian District Integration Development Project ( 2022JS004 ), Major Basic Research Project of Natural Science Foundation in Shandong Province ( ZR2020ZD10 ), Natural Science Foundation of Shandong Province ( ZR2022ME016 ), Shandong Postdoctoral Innovation Project ( SDCX-ZG-202201014 ), and SDUT & Zibo City Integration Development Project ( 2021SNPT0015 ). Publisher Copyright: © 2023 The Authors
Keywords
Direct carbon, Finger-like pore, Multi-physical field model, Nickel-based anode, Porosity, Solid oxide fuel cell
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Citation
Han, T, Li, L, Zhang, J, Yu, F, Sun, H, Sunarso, J & Yang, N 2023, ' Simulation-guided design of a finger-like nickel-based anode for enhanced performance of direct carbon solid oxide fuel cells ', Ceramics International, vol. 49, no. 24, pp. 40942-40952 . https://doi.org/10.1016/j.ceramint.2023.10.085