Micro-CT structures facilitated lattice Boltzmann simulations on the water dynamics in PEMFCs GDL-Gas channel

Lv, Xuecheng1; Zhou, Zhifu2; Wu, Wei-Tao3; Wei, Lei4; Hu, Chengzhi1; Li, Yang1; Yang, Yunjie1; Li, Yubai1; Song, Yongchen1

2024-09-26

10.1016/j.ijhydene.2024.08.310

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   影响因子和分区

0360-3199

1879-3487

This study employed Micro X-ray computed tomography (Micro-CT) to reconstruct the gas diffusion layer (GDL) in proton exchange membrane fuel cells (PEMFCs) and used lattice Boltzmann method (LBM) simulations to investigate the dynamic behavior of liquid water in the multiscale space of the GDL and gas channel (GC). The results showed that the transport of liquid water from GDL to GC through the interface of GDL-land and GDL-GC were divided into four stages: large pore filling, through-plane breakthrough, in-plane diffusion, and rapid transport into GC. The wettability of GC wall and GDL affects the transport and distribution of liquid water. When the contact angle on the GC wall was less than 90 degrees, it promoted liquid water transport to the top GC wall, resulting in faster internal flow formation. Conversely, contact angles exceeding 90 degrees caused liquid water to break through the GDL-GC interface from pores away from the GC wall. When the contact angle of the GDL was in the range of 110 degrees-150 degrees, both excessively large and excessively small contact angles hindered water transport and management. Maintaining the contact angle of the GDL around 130 degrees enhanced the breakthrough path and transport speed of liquid water into the GC, and it also reduces localized liquid water accumulation.

Proton exchange membrane fuel cell Water dynamics Lattice Boltzmann simulation Gas diffusion layer Gas channel

SCI ; EI

英语

其他

National Natural Science Foundation of China["52106226","52176058"]

Chemistry ; Electrochemistry ; Energy & Fuels

Chemistry, Physical ; Electrochemistry ; Energy & Fuels

WOS:001301130600001

PERGAMON-ELSEVIER SCIENCE LTD

ENGINEERING

Web of Science

1.Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116023, Peoples R China
2.Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
3.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China

Lv, Xuecheng,Zhou, Zhifu,Wu, Wei-Tao,et al. Micro-CT structures facilitated lattice Boltzmann simulations on the water dynamics in PEMFCs GDL-Gas channel[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2024,84.

Lv, Xuecheng.,Zhou, Zhifu.,Wu, Wei-Tao.,Wei, Lei.,Hu, Chengzhi.,...&Song, Yongchen.(2024).Micro-CT structures facilitated lattice Boltzmann simulations on the water dynamics in PEMFCs GDL-Gas channel.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,84.

Lv, Xuecheng,et al."Micro-CT structures facilitated lattice Boltzmann simulations on the water dynamics in PEMFCs GDL-Gas channel".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 84(2024).