.png){kind=icon}
返回
High performance gas diffusion layers with added deterministic structures
.png){kind=icon}
PRE
AI
DOI：10.1039/d1ee03246a.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Polymer electrolyte fuel cells are a key technology for future green energy systems for transport applications and for balancing the intermittency of renewable energies. For wider application, material enhancements of all functional fuel cell components to increase the power density and reduce fuel cell cost are required. Gas diffusion layers (GDLs) with deterministic structures, reducing mass transport overpotentials and enabling high current density operation, play a vital role in this development. Adding deterministic structures to the random GDL structure in the form of perforated slits, connecting flow field lands and channels, facilitates water transport and can drain saturated pore space. Here we investigate a large range of laser-structured GDL patterns to optimize water management. An optimal pattern that increases the power density by up to 20% was identified. The perforations increase the through-plane diffusivity and reduce, together with the improved water transport, the oxygen transport resistance. Membrane water evaporation through perforations at the anode, increasing the membrane resistance, was identified as the antagonist to these effects, limiting the performance gain at about 5% perforation area. Asymmetric GDL assemblies and the use of micro-porous layers indicate ways to solve these issues. The large investigated parameter space provides guidelines for other GDL substrates and/or flow field geometries.
Keyword:
PEM FUEL-CELLS
MICROSTRUCTURE-PROPERTY RELATIONSHIPS
ADVANCED WATER MANAGEMENT
LASER PERFORATION
OXYGEN-TRANSPORT
COMPRESSION
SATURATION
HYDROGEN
GDL
WETTABILITY
期刊
IF:
30.8
论文数:
6.9K
被引数:
14.2W
机构
引用论文
Gas Diffusion Layers with Deterministic Structure for High Performance Polymer Electrolyte Fuel Cells用于高性能聚合物电解质燃料电池的具有确定性结构的气体扩散层
PREAI
分享收藏Microstructure-property relationships in a gas diffusion layer (GDL) for Polymer Electrolyte Fuel Cells, Part I: effect of compression and anisotropy of dry GDL.png)
ELECTROCHIMICA ACTA
ELECTROCHIMICA ACTAIF5.6
PREAI
分享收藏Enhancing liquid water transport by laser perforation of a GDL in a PEM fuel cell通过对PEM燃料电池中的GDL进行激光穿孔来增强液态水的传输
PREAI
分享收藏Engineered Water Highways in Fuel Cells: Radiation Grafting of Gas Diffusion Layers燃料电池中的工程水高速公路: 气体扩散层的辐射接枝ADVANCED MATERIALS
OAAI
ADVANCED MATERIALSIF26.8
OAAI分享收藏
查看更多内容