The Amount of Hydrophobic Resin Binder in the Micro Diffusion Layer for DMFC

2004 ◽  
Vol 1 (1) ◽  
pp. 66-68
Author(s):  
Minehisa Imazato ◽  
Hayato Hommura ◽  
Go Sudo ◽  
Kenji Katori ◽  
Koichi Tanaka
Keyword(s):  
Diffusion Layer ◽  
High Performance ◽  
Critical Parameter ◽  
Catalyst Layer ◽  
Carbon Paper ◽  
Resin Binder ◽  
Performance Area ◽  
Stable Mixture

The micro-diffusion layer for DMFC consists of carbon and hydrophobic resin used as a binder. The function of the micro diffusion layer on carbon paper is not only to support the catalyst layer to conduct electricity, but also to maintain a stable mixture of gas and liquid. The amount of hydrophobic resin binder in the micro diffusion layer is therefore a critical parameter. The amount of hydrophobic resin binder is normally less than 50wt%, but we investigated this parameter and found that there is another high performance area around 80wt%.

Preparation and Performance Study of Anode Self-Humidifying Gas Diffusion Layer

2021 ◽  
Author(s):  
Tianya Li ◽  
Ke Zhou ◽  
Guangyi Lin
Keyword(s):  
Fuel Cell ◽  
Diffusion Layer ◽  
Catalyst Layer ◽  
Gas Diffusion Layer ◽  
Transmission Efficiency ◽  
Gas Diffusion ◽  
Carbon Paper ◽  
Performance Study ◽  
Small Water ◽  
And Performance

Abstract Hydrogen is oxidized into H+ and e- on the anode side of fuel cell. H+ are transported from anode to cathode of fuel cell in the form of H3+O. When fuel cell is running under low humidity, the relatively small water content will reduce H+ transmission efficiency and causes an increase in ohmic impedance. In order to solve this problem, this paper prepared self-humidifying gas diffusion layer （GDL） by spraying method. The content of PTFE in the microporous layer (MPL) near carbon paper side is relatively high, and the content of PTFE in MPL near catalyst layer side is relatively low, thus forming MPL with graded hydrophobic structure. Since the MPL near catalyst layer side is relatively hydrophilic, it will condense into liquid water when external humidifying gas passes, thereby generating self-humidifying effect. Through research, self-humidifying GDL with double MPL structure can produce good self-humidification.

3D MoS2 foam integrated with carbon paper as binder-free anode for high performance sodium-ion batteries

2021 ◽  
Author(s):  
Fangying Zheng ◽  
Zeyu Wei ◽  
Huicong Xia ◽  
Yunchuan Tu ◽  
Xiangyu Meng ◽  
...  
Keyword(s):  
High Performance ◽  
Sodium Ion ◽  
Carbon Paper ◽  
Sodium Ion Batteries ◽  
Binder Free

scholarly journals High performance anion exchange ionomer for anion exchange membrane fuel cells

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 19153-19161 ◽  
Author(s):  
Xueqiang Gao ◽  
Hongmei Yu ◽  
Jia Jia ◽  
Jinkai Hao ◽  
Feng Xie ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Anion Exchange ◽  
High Performance ◽  
Catalyst Layer ◽  
Anion Transport ◽  
Anion Exchange Membrane ◽  
Exchange Membrane

The anion exchange ionomer incorporated into the electrodes of an anion exchange membrane fuel cell (AEMFC) enhances anion transport in the catalyst layer of the electrode, and thus improves performance and durability of the AEMFC.

scholarly journals Essentials of High Performance Water Electrolyzers – From Catalyst Layer Materials to Electrode Engineering

2021 ◽  
pp. 2101998
Author(s):  
Chuyen Van Pham ◽  
Daniel Escalera‐López ◽  
Karl Mayrhofer ◽  
Serhiy Cherevko ◽  
Simon Thiele
Keyword(s):  
High Performance ◽  
Catalyst Layer

scholarly journals Time-Resolved X-ray Operando Observations of Lithiation Gradients across the Cathode Matrix and Individual Oxide Particles during Fast Cycling of a Li-Ion Cell

2021 ◽  
Author(s):  
Tianlong Zheng ◽  
Jing He ◽  
Pingwei Cai ◽  
Xi Liu ◽  
Duojie Wu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Performance ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Carbon Paper ◽  
Free Energy Barrier ◽  
Active Components

Abstract Self-supporting three-dimensional (3D) transition metal electrodes have been considered for designing high-performance non-noble metal oxygen evolution reaction (OER) catalysts owing to their advantages such as binder-free, good mass transfer, and large specific surface area. However, the poor conductivity of ((oxy)hydr)oxides and the difficulty in adjusting their electronic structure limit their application. As an alternative strategy, instead of constituting the array electrode by the active components themselves, we herein report 3D Co(OH)2@MnO2 heterostructure decorated carbon nanoarrays grown directly on carbon paper (Co(OH)2@MnO2-CNAs). This unique structure can not only enhance electrical conductivity but also provide a larger specific surface area, and facilitate electrolyte diffusion and ion transport. The core-shell heterostructured Co(OH)2@MnO2 formed via incorporation with MnO2 facilitates the transition of CoII to CoIII in Co(OH)2 and it increases the storage of oxidative charge in the catalyst, leading to an OER activity with benchmark RuO2 and good stability. Density functional theory calculations suggest that the improved OER performance can be attributed to the formation of the heterojunction structure, resulting in the modulation of the electronic structure of Co atoms and the reduction of the free energy barrier of the rate-determining step for the OER.

A novel and high performance activated carbon air-cathode with decreased volume density and catalyst layer invasion for microbial fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (80) ◽  
pp. 42577-42580 ◽  
Author(s):  
Yueyong Zhang ◽  
Xin Wang ◽  
Xiaojing Li ◽  
Ningshengjie Gao ◽  
Lili Wan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Activated Carbon ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Catalyst Layer ◽  
Volume Density ◽  
Air Cathode
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