A highly proton-conducting, methanol-blocking Nafion composite membrane enabled by surface-coating crosslinked sulfonated graphene oxide

2016 ◽  
Vol 52 (10) ◽  
pp. 2173-2176 ◽  
Author(s):  
Guangwei He ◽  
Xueyi He ◽  
Xinglin Wang ◽  
Chaoyi Chang ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Film ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Surface Coating ◽  
Nafion Membrane ◽  
Methanol Permeability ◽  
High Proton Conductivity ◽  
High Proton ◽  
Sulfonated Graphene

Coating an ultrathin graphene oxide film onto a Nafion membrane confers a distinct anti-tradeoff behavior: 93% decrease of methanol permeability while retaining the high proton conductivity.

Nafion – Azole Composite Membranes for High Temperature PEMFC

2014 ◽  
Vol 783-786 ◽  
pp. 1692-1697
Author(s):  
Je Deok Kim ◽  
Mun Suk Jun
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
High Temperature ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Room Temperature ◽  
Composite Membranes ◽  
Thermal And Mechanical Properties ◽  
High Proton Conductivity ◽  
High Proton

Nafion-azole (benzimidazole, 1,2,4-triazole, 1,2,3-triazole) composite membranes were prepared by room temperature and autoclave solution processing for high temperature (above 100 °C) PEMFC. Among the various Nafion – azole composite membranes, Nafion – 1,2,3-triazole membrane showed excellent flexibility, thermal stability, and homogeneous structure. Nafion – 1,2,4-triazole composite membrane had high thermal and mechanical properties, and also showed high proton conductivity of 0.02 S/cm at the temperature of 160 °C under dry (N2) condition.

A DNA-Threaded ZIF-8 Membrane with High Proton Conductivity and Low Methanol Permeability

2017 ◽  
Vol 30 (2) ◽  
pp. 1705155 ◽  
Author(s):  
Yi Guo ◽  
Zhongqing Jiang ◽  
Wen Ying ◽  
Liping Chen ◽  
Yazhi Liu ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Methanol Permeability ◽  
High Proton Conductivity ◽  
High Proton

Analytical Model for Effect of Polymer Composite Membrane Properties on Direct Methanol Fuel Cell Performance

2014 ◽  
Vol 931-932 ◽  
pp. 95-100
Author(s):  
Theampetch Apichaya ◽  
Paweena Prapainainar ◽  
Chaiwat Prapainainar
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Polymer Composite ◽  
Composite Membrane ◽  
Direct Methanol Fuel Cell ◽  
Membrane Properties ◽  
Methanol Permeability ◽  
High Proton ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Abstract. Performance of direct methanol fuel cell (DMFC), using polymer composite membrane, can be directly affected by membrane properties, including permeability, proton conductivity and membrane thickness. In order to obtain high DMFC performance, methanol permeability of the membrane should be low, while keeping high proton conductivity. This may be achieved by modification of incorporating inorganic filler into high proton conducting membrane. In this work, the analytical modeling for DMFC performance prediction was developed to be a guideline for Nafion based membrane improvement. Methanol permeability and proton conductivity were set at 0.30 – 5.60 cm2×S-1 and 0.08 – 0.15 S×cm-1 with the thickness of 25 – 1000 μm. The results show that DMFC performance strongly depends on the methanol permeability especially with thin membrane giving maximum power density of 1034 and 100mW×cm-2 at the permeability of 0.30 and 5.60 cm2×S-1, respectively, with thickness of 45 μm, while with thick membrane the permeability has negligibly effect. However, the proton conductivity mainly affects DMFC performance only with thick membrane as a result of ohmic resistance.

Humidity Sensor Based on High Proton Conductivity of Graphene Oxide

2015 ◽  
Vol 14 (5) ◽  
pp. 931-937 ◽  
Author(s):  
Sourav Ghosh ◽  
Ruma Ghosh ◽  
Prasanta Kumar Guha ◽  
Tarun Kanti Bhattacharyya
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Humidity Sensor ◽  
High Proton Conductivity ◽  
High Proton

Graphene Oxide Nanosheet with High Proton Conductivity

2013 ◽  
Vol 135 (22) ◽  
pp. 8097-8100 ◽  
Author(s):  
Mohammad Razaul Karim ◽  
Kazuto Hatakeyama ◽  
Takeshi Matsui ◽  
Hiroshi Takehira ◽  
Takaaki Taniguchi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
High Proton Conductivity ◽  
High Proton ◽  
Graphene Oxide Nanosheet
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