质子交换膜燃料电池
墨水池
催化作用
图层(电子)
启示
化学工程
膜
机制(生物学)
化学
燃料电池
材料科学
有机化学
复合材料
工程类
物理
生物化学
艺术
文学类
量子力学
作者
Rui Lin,Jian Lü,Shengchu Liu,Shiyang Hua,Xin Cai,K. Andreas Friedrich
标识
DOI:10.1016/j.apsusc.2024.159608
摘要
The optimal catalyst layer microstructure is vital for the commercialization of proton exchange membrane fuel cells. Understanding catalyst ink is crucial for achieving this microstructure. This study investigates the effect of solvents on ionomer behavior to establish the relationship between catalyst ink and fuel cell performance. Molecular dynamics simulation results show that the water and n-propanol mixture (NPA-aq) solvent has a stronger binding interaction with the Pt surface compared to other solvents. NPA-aq solvent weakens ionomer adsorption on the Pt surface and creates a porous proton conduction network. The NPA-aq MEA exhibits lower mass transfer resistance than the Water MEA and EG-aq MEA. However, the results of dynamic light scattering show that NPA-aq ink particles aggregate and grow up over time, leading to an increase in the coverage degree of ionomer on Pt surface and reducing electrochemical active surface area. This work provides mechanistic analysis for the solvent selection of the ink with a targeted ionomer control, which is helpful to reduce the mass transfer loss and accelerate the commercialization of fuel cells.
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