Phosphonic acid functionalized poly(dimethyl siloxane) membrane for high temperature proton exchange membrane fuel cells

Ghil, Lee-Jin; Kim, Chang-Kyeom; Rhee, Hee‐Woo

doi:10.1016/j.cap.2008.12.030

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…They primarily serve as PEMs under low RH operational conditions. This section primarily describes glass membranes, ceramic membranes, and organic–inorganic hybrid membranes based on a silicate matrix. − Uma and co-workers prepared a series of glass membranes, including PMA–P 2 O 5 –SiO 2 , PMA/PWA–P 2 O 5 –SiO 2 , PWA/TiO 2 –P 2 O 5 –SiO 2 , TiO 2 /ZrO 2 –P 2 O 5 –SiO 2 , PMA/ZrO 2 –P 2 O 5 –SiO 2 , and PWA/ZrO 2 –P 2 O 5 –SiO 2 glass membranes. − Their investigations indicate that the proton conductivity in the glass membranes mainly occurs through the hydrogen bonding of water and hydroxyl groups on the network structure. The proton conductivity is considerably dependent on the temperature, humidity conditions, and pore characteristics such as the pore size and the functional groups on the pore surfaces (i.e., SiOH, POH, and PO), as well as on the chemical composition.…”

Section: Nonfluorinated Acid Ionomer Membranesmentioning

confidence: 99%

Recent Development of Polymer Electrolyte Membranes for Fuel Cells

2012

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Membranes with Proton-Conducting Polymer Components 2793 4. Nonfluorinated Acid Ionomer Membranes 2793 4.1. Poly(arylene ether)-Based Membranes 2793 4.1.1. Modification of SPEEK Membrane 2793 4.1.2. Poly(arylene ether)s with Cross-Linkable Groups 2794 4.1.3. Poly(arylene ether)s with Pendant Sulfonated Groups or Side-Chains 2799 4.1.4. Poly(arylene ether)s with Backbones Containing Heteroatoms Such as F, N, S, and P 2800 4.1.5. Multiblock Copoly(arylene ether)s Synthesized by the Coupling Reaction of Hydrophilic and Hydrophobic Macromonomers 2803 4.2. Polyimide-Based Membranes 2804 4.2.1. SPIs Based on NTDA 2804 4.2.2. SPIs based on BNTDA 2806 4.2.3. SPIs Based on Other Dianhydrides 2807 4.3. Hydrocarbon Polymer with Aliphatic Main-Chain-Based Membranes 2807 4.4. Glass Membranes 2809 5. Polybenzimidazole/H 3 PO 4 Membranes 2809 5.1. Modifications to mPBI 2810 5.1.1. Optimizations of Preparation and Operation of Acid-Doped mPBI System 2810 5.1.2. Modified mPBI/H 3

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Section: Nonfluorinated Acid Ionomer Membranesmentioning

confidence: 99%

Recent Development of Polymer Electrolyte Membranes for Fuel Cells

2012

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“…As is known, operation of PEMFCs in the temperature range of 100-200uC provides some merits such as avoiding CO poisoning of catalysts and improving energy conversion efficiency. However, 3 commercial Nafion membranes do not satisfy the need because of low proton conductivity and weak heat stability under high temperature and low humidity. Besides, the high price and complex preparation process have also prevented Nafion membranes from spreading and popularising.…”

Section: Introductionmentioning

confidence: 98%

Synthesis and characterisation of chitosan–nitrogen polyphosphonic acid poly(organosiloxane) high temperature proton exchange membranes for fuel cells

Yin

Gao

Shen

et al. 2016

Materials Technology

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One kind of acid-base high temperature proton exchange membrane was synthesised from chitosan (CS), 3-aminopropyltriethoxysilane (APTES) and amino trimethylene phosphonic acid (ATMP) by sol-gel process. In order to prevent phosphonic acid from leaching out, ATMP was introduced as proton conductor as well as cross-linker. Fourier transform infrared suggests that the SiZOC 2 H 5 in APTES appears as a hydrolysis-polycondensation yielding SiZOZSi network, and the introduction of ATMP leads to the protonation of the amino group. These membranes are thermally stable up to ,1808C and show excellent oxidative stability. In addition, the proton conductivity of CS/APTES/ATMP membranes increases with increasing temperature, reaching the value of 0?0578 S cm 21 at 1408C under normally anhydrous condition, which indicates that the acid-base pair and hydrogen bond network in CS/APTES/ATMP membranes are favourable to proton transfer.

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“…There have been many approaches to new membranes including nanocomposites of sulfonated polymers with conductive inorganic additives. However these approaches have not been successful because these composite membranes still have low proton conductivity (< 10 -3 S/cm) at low RH (< 30%) because of sufonic acid moieties [3][4].…”

mentioning

confidence: 99%