Search Results - subject:"Methanol crossover"

A CNT (carbon nanotube) paper as cathode gas diffusion electrode for water management of passive μ-DMFC (micro-direct methanol fuel cell) with highly concentrated methanol

Deng, Huichao; Zhang, Yufeng; Zheng, Xue; Li, Yang; … - In: Energy 82 (2015) C, pp. 236-241

management and decreases methanol crossover. The CNT (carbon nanotube) paper replacing CP (carbon paper) as GDL (gas diffusion … paper) enhances water back diffusion which passively prevents flooding in the cathode and promotes low methanol crossover …

Persistent link: https://www.econbiz.de/10011209547

Non-isothermal modeling of a small passive direct methanol fuel cell in vertical operation with anode natural convection effect

Wang, Luwen; Zhang, Yufeng; An, Zijian; Huang, Siteng; … - In: Energy 58 (2013) C, pp. 283-295

the cell. The results also indicate that the rate of methanol crossover increases with increasing methanol concentration … from 1 M to 4 M. When incrementally increasing the current densities, the rate of methanol crossover decreased at low …

Persistent link: https://www.econbiz.de/10011053623

Local entropy generation analysis on passive high-concentration DMFCs (direct methanol fuel cell) with different cell structures

Li, Xianglin; Faghri, Amir - In: Energy 36 (2011) 1, pp. 403-414

In this paper, the local entropy generation analysis has been conducted based on a two-dimensional, two-phase, non-isothermal DMFC (direct methanol fuel cell) model, the entropy generation contributed by the chemical reactions, heat transfer, mass diffusion, and viscous dissipation is...

Persistent link: https://www.econbiz.de/10010809836

A global transient, one-dimensional, two-phase model for direct methanol fuel cells (DMFCs) – Part II: Analysis of the time-dependent thermal behavior of DMFCs

Chippar, Purushothama; Ko, Johan; Ju, Hyunchul - In: Energy 35 (2010) 5, pp. 2301-2308

the transient thermal behavior of DMFCs and its influence on methanol crossover, cell performance, and efficiency. 1D … temperature, methanol crossover, cell voltage, and efficiency during DMFC operations, the simulations of transient behavior …

Persistent link: https://www.econbiz.de/10010809884

A one-dimensional, two-phase model for direct methanol fuel cells – Part I: Model development and parametric study

Ko, Johan; Chippar, Purushothama; Ju, Hyunchul - In: Energy 35 (2010) 5, pp. 2149-2159

porous media is described by Darcy's equation. In addition, the model fully accounts for water and methanol crossover through … on the methanol crossover rate as well as cell performance and efficiency. The results emphasize that the material …

Persistent link: https://www.econbiz.de/10011053133