Development of porous silicon based direct methanol fuel cells with nitric acid as liquid oxidant for portable applications

2014 ◽  
Vol 4 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Tsali Cross ◽  
Derek Reiman ◽  
Chris D'Couto
Keyword(s):  
Fuel Cells ◽  
Nitric Acid ◽  
Porous Silicon ◽  
Direct Methanol Fuel Cells ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Silicon Based

Effects of grafting parameters on the properties of proton exchange membranes based on sulfo-functionalized porous silicon for micro direct methanol fuel cells

2019 ◽  
Vol 39 (7) ◽  
pp. 620-627 ◽  
Author(s):  
Mei Wang ◽  
Litian Liu ◽  
Xiaohong Wang
Keyword(s):  
Fuel Cells ◽  
Porous Silicon ◽  
Proton Exchange Membrane ◽  
Direct Methanol Fuel Cells ◽  
Electrochemical Impedance ◽  
Proton Exchange ◽  
Competitive Reaction ◽  
Chemical Grafting ◽  
Direct Methanol ◽  
Methanol Fuel Cells

Abstract 3-Mercaptopropyltrimethoxysilane [MPTMS, (CH3O)3SiCH2CH2CH2SH] can be grafted to porous silicon via a simple chemical grafting method and then sulfonated to prepare a proton exchange membrane (PEM) for application in micro direct methanol fuel cells (μDMFCs). The concentration of MPTMS and the pH of the solvent, which is varied by adding glacial acetic acid (GAA), play important roles in the chemical grafting process. In this work, PEMs based on sulfo-functionalized porous silicon were prepared at MPTMS concentrations ranging from 10 wt.% to 90 wt.% and GAA concentrations ranging from 0 wt.% to 10 wt.% to study the effects of grafting parameters on the proton transport properties of PEMs. Electrochemical impedance spectroscopy shows that the proton conductivity of the PEMs can be tuned by changing the MPTMS and GAA concentrations, and it reaches a maximum of 0.082 S/cm at an MPTMS concentration of 30 wt.% and a GAA concentration of 5 wt.%. The effects of MPTMS and GAA concentrations on the properties of PEMs are discussed in the context of two competitive reaction pathways of MPTMS molecules: dehydration condensation with silanols on the walls of porous silicon and self-polymerization.

Investigations of silicon-based air-breathing micro direct methanol fuel cells with different anode flow fields

2013 ◽  
Vol 111 ◽  
pp. 180-184 ◽  
Author(s):  
Huichao Deng ◽  
Shengtian Sang ◽  
Yufeng Zhang ◽  
Zipeng Li ◽  
Xiaowei Liu
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Flow Fields ◽  
Air Breathing ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Silicon Based

A water collecting and recycling structure for silicon-based micro direct methanol fuel cells

2012 ◽  
Vol 37 (1) ◽  
pp. 967-976 ◽  
Author(s):  
Yan’an Zhou ◽  
Xiaohong Wang ◽  
Xun Guo ◽  
Xinping Qiu ◽  
Litian Liu
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Silicon Based
Sign in / Sign up

Export Citation Format

Share Document