固体氧化物燃料电池运行初期阳极衰减的玻尔兹曼方法研究

刘世学; 刘治京; 张淑兴; 吴昊

doi:10.1007/s12613-023-2692-8

Volume 31 Issue 2

Feb. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(2): 405-411

Shixue Liu, Zhijing Liu, Shuxing Zhang, and Hao Wu, Lattice Boltzmann simulation study of anode degradation in solid oxide fuel cells during the initial aging process, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 405-411. https://doi.org/10.1007/s12613-023-2692-8

Cite this article as:

Shixue Liu, Zhijing Liu, Shuxing Zhang, and Hao Wu, Lattice Boltzmann simulation study of anode degradation in solid oxide fuel cells during the initial aging process, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 405-411. https://doi.org/10.1007/s12613-023-2692-8

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研究论文

固体氧化物燃料电池运行初期阳极衰减的玻尔兹曼方法研究

1)
中广核研究院有限公司氢能产业技术创新中心, 深圳 518031, 中国
2)
深圳市氢能安全工程技术研究中心, 深圳 518031, 中国

通讯作者:
刘世学 E-mail: liushixue@cgnpc.com.cn

文章亮点

(1) 发现电池运行初期阳极功能区附近有较大的三相线长度以及材料连通性减小。

(2) 使用格子玻尔兹曼方法模拟区分出电极的活性衰减和结构衰减。

(3) 电极活性衰减和结构衰减均来源于阳极镍催化剂的迁移和粗化。

中文摘要

固体氧化物燃料电池在运行初始阶段有较快的性能衰减，有必要进行量化的衰减机理分析。本文使用聚焦离子束扫描电子显微镜对固体氧化物燃料电池多孔阳极微结构进行测试并完成三维重构，然后利用格子玻尔兹曼方法对重构电极内部多物理场过程及电化学反应进行了模拟。该方法用于工业尺寸单电池的测试和仿真模拟，对一个刚还原的电池与一个经过初期衰减的电池进行了比较分析。三维重构的统计结果显示跟刚还原的电池相比，经过初期衰减的电池电极内三相线长度和镍催化剂的连通性有明显减小。格子玻尔兹曼模拟结果显示初期衰减阶段电极活性衰减的贡献比结构衰减更大，经过初期衰减的电池电化学反应区域从阳极功能区扩展到了阳极支撑层。从衰减原因来看，电极活性衰减和结构衰减均来源于阳极镍催化剂的迁移和粗化。

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Research Article

Lattice Boltzmann simulation study of anode degradation in solid oxide fuel cells during the initial aging process

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Abstract

Abstract

For present solid oxide fuel cells (SOFCs), rapid performance degradation is observed in the initial aging process, and the discussion of the degradation mechanism necessitates quantitative analysis. Herein, focused ion beam-scanning electron microscopy was employed to characterize and reconstruct the ceramic microstructures of SOFC anodes. The lattice Boltzmann method (LBM) simulation of multiphysical and electrochemical processes in the reconstructed models was performed. Two samples collected from industrial-size cells were characterized, including a reduced reference cell and a cell with an initial aging process. Statistical parameters of the reconstructed microstructures revealed a significant decrease in the active triple-phase boundary and Ni connectivity in the aged cell compared with the reference cell. The LBM simulation revealed that activity degradation is dominant compared with microstructural degradation during the initial aging process, and the electrochemical reactions spread to the support layer in the aged cell. The microstructural and activity degradations are attributed to Ni migration and coarsening.
- solid oxide fuel cell;
- anode degradation;
- focused ion beam-scanning electron microscopy;
- lattice Boltzmann method

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References

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