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Prediction of fuel cell performance degradation using a combined approach of machine learning and impedance spectroscopy
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作者 Zewei Lyu Yige Wang +6 位作者 Anna Sciazko Hangyue Li Yosuke Komatsu Zaihong Sun Kaihua Sun naoki shikazono Minfang Han 《Journal of Energy Chemistry》 SCIE EI CSCD 2023年第12期32-41,I0003,共11页
Accurate prediction of performance degradation in complex systems such as solid oxide fuel cells is crucial for expediting technological advancements.However,significant challenges still persist due to limited compreh... Accurate prediction of performance degradation in complex systems such as solid oxide fuel cells is crucial for expediting technological advancements.However,significant challenges still persist due to limited comprehension of degradation mechanisms and difficulties in acquiring in-situ features.In this study,we propose an effective approach that integrates long short-term memory(LSTM) neural network and dynamic electrochemical impedance spectroscopy(DEIS).This integrated approach enables precise prediction of future evolutions in both current-voltage and EIS features using historical testing data,without prior knowledge of degradation mechanisms.For short-term predictions spanning hundreds of hours,our approach achieves a prediction accuracy exceeding 0.99,showcasing promising prospects for diagnostic applications.Additionally,for long-term predictions spanning thousands of hours,we quantitatively determine the significance of each degradation mechanism,which is crucial for enhancing cell durability.Moreover,our proposed approach demonstrates satisfactory predictive ability in both time and frequency domains,offering the potential to reduce EIS testing time by more than half. 展开更多
关键词 Solid oxide fuel cell Performance degradation Electrochemical impedance spectroscopy Longshort-term memory Machine learning
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Three dimensional microstructures of carbon deposition on Ni-YSZ anodes under polarization
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作者 Dongxu Cui Anna Sciazko +5 位作者 Yosuke Komatsu Akiko Nakamura Toru Hara Shiliang Wu Rui Xiao naoki shikazono 《Journal of Energy Chemistry》 SCIE EI CSCD 2023年第12期359-367,I0010,共10页
In the present study,two Ni/YSZ anodes with different volume ratios of Ni and YSZ,30:70 and 45:55 vol%,are operated in dry methane under open circuit and polarized conditions.Three-dimensional(3D)Ni/YSZ microstructure... In the present study,two Ni/YSZ anodes with different volume ratios of Ni and YSZ,30:70 and 45:55 vol%,are operated in dry methane under open circuit and polarized conditions.Three-dimensional(3D)Ni/YSZ microstructures after carbon deposition are reconstructed by the focused ion beam-scanning electron microscopy(FIB-SEM)with the help of machine learning segmentation.From the reconstructed mircostructures,volume fraction,connectivity,three phase boundary(TPB)density,and tortuosity are quantified.In addition,local carbon microstructures are quantitatively reconstructed,and the effect of polarization on carbon morphology is investigated.It is demonstrated that Ni surface in the vicinity of active TPB near the electrolyte is free from carbon formation,while remaining Ni surface at some distances from TPB exhibits severe carbon deposition.In average,total amount of carbon deposition is larger near the electrolyte.These observations imply complex interplay between the electrochemical steam generation and methane cracking on Ni surface which take place very locally near the active TPB. 展开更多
关键词 Solid oxide fuel cell ANODE Carbon deposition Triple-phase boundary 3D reconstruction
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3D reconstruction size effect on the quantification of solid oxide fuel cell nickel-yttria-stabilized-zirconia anode microstructural information using scanning electron microscopy-focused ion beam technique 被引量:3
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作者 Zhenjun Jiao naoki shikazono 《Science Bulletin》 SCIE EI CAS CSCD 2016年第17期1317-1323,共7页
Self-made conventional nickel-yttria-stabilized zirconia composite anodes after reduction and 500 h operation were analyzed by three-dimensional microstructure reconstruction based on focused ion beam-scanning electro... Self-made conventional nickel-yttria-stabilized zirconia composite anodes after reduction and 500 h operation were analyzed by three-dimensional microstructure reconstruction based on focused ion beam-scanning electron microscopy technique.Interfacial area,threephases-boundary density and phase volume fraction were measured based on the three-dimensional microstructure reconstruction to quantitatively study the statistical characterization of solid oxide fuel cell nickel-yttria-stabilizedzirconia anode microstructure before and after operation.It is found that for anode operated with long time,it is necessary to increase the corresponding three-dimensional reconstruction size to suppress the influence of microstructure variation caused by Ni agglomeration in order to obtain more accurate microstructural quantification information. 展开更多
关键词 FIB-SEM 3D reconstruction TPB density Tetragonal mesh
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Correlation between microstructures and macroscopic properties of nickel/ yttria-stabilized zirconia (Ni-YSZ) anodes: Meso-scale modeling and deep learning with convolutional neural networks 被引量:1
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作者 Xuhao Liu Shihao Zhou +3 位作者 Zilin Yan Zheng Zhong naoki shikazono Shotaro Hara 《Energy and AI》 2022年第1期31-42,共12页
A deep learning based homogenization framework is proposed to link the microstructures of porous nickel/yttriastabilized zirconia anodes in solid oxide fuel cells(SOFCs)to their effective macroscopic properties.A vari... A deep learning based homogenization framework is proposed to link the microstructures of porous nickel/yttriastabilized zirconia anodes in solid oxide fuel cells(SOFCs)to their effective macroscopic properties.A variety of microstructures are generated by the discrete element method and the meso‑scale kinetic Monte Carlo method.Then,the finite element method and the homogenization theory are used to calculate the effective elastic modulus(E),Poisson’s ratio(υ),shear modulus(G)and coefficient of thermal expansion(CTE)of representative volume elements.In addition,the triple-phase boundary length density(LTPB)is also calculated.The convolutional neural network(CNN)based deep learning model is trained to find the potential relationship between the microstructures and the five effective macroscopic properties.The comparison between the ground truth and the predicted values of the new samples proves that the CNN model has an excellent predictive performance.This indicates that the CNN model could be used as an effective alternative to numerical simulations and homogenization because of its accurate and rapid prediction performance.Hence the deep learning-based homogenization framework could potentially accelerate the continuum modeling of SOFCs for microstructure optimization. 展开更多
关键词 Solid oxide fuel cells Porous microstructure ANODE Effective macroscopic properties Convolutional neural network
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