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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
- Source :
- Energy. 82:236-241
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- A novel MEA (membrane electrode assembly) structure of passive μ-DMFC (micro-direct methanol fuel cell) controls water 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. Moreover, the unique structure of CNT paper can also enhance efficiency of oxygen mass transport and catalyst utilization. The passive μ-DMFC with CNT-MEA exhibits significantly higher performance than passive μ-DMFC with CP-MEA and can operate in high methanol concentration, showing the peak power density of 23.2 mW cm −2 . The energy efficiency and fuel utilization efficiency are obviously improved from 11.54% to 22.7% and 36.61%–49.34%, respectively, and the water transport coefficient is 0.47 which is lower than previously reported passive μ-DMFC with CP.
- Subjects :
- Methanol reformer
Materials science
Water transport
Gas diffusion electrode
Mechanical Engineering
Membrane electrode assembly
Nanotechnology
Building and Construction
Pollution
Industrial and Manufacturing Engineering
Cathode
law.invention
Direct methanol fuel cell
chemistry.chemical_compound
General Energy
Chemical engineering
chemistry
law
Methanol
Electrical and Electronic Engineering
Methanol fuel
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 03605442
- Volume :
- 82
- Database :
- OpenAIRE
- Journal :
- Energy
- Accession number :
- edsair.doi...........c6f8645db98eec060c17baf3da4b967b