NDLI: Independent control of water retention and acid–base pairing through double-shelled microcapsules to confer membranes with enhanced proton conduction under low humidity

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Inside front cover

Contents list

Superhydrophobic electrospun nanofibers

Titanium hydrazide gels for Kubas-type hydrogen storage

Ultrathin nanoporous Fe₃O₄–carbon nanosheets with enhanced supercapacitor performance

Development of high efficiency adsorbents for CO₂ capture based on a double-functionalization method of grafting and impregnation

Facile fabrication of MWCNT-doped NiCoAl-layered double hydroxide nanosheets with enhanced electrochemical performances

Mild and cost-effective synthesis of iron fluoride–graphene nanocomposites for high-rate Li-ion battery cathodes

Efficient catalytic conversion of ammonia borane to borazine and its use for hexagonal boron nitride (white graphene)

A sulfur-assisted strategy to decorate MWCNTs with highly dispersed Pt nanoparticles for counter electrode in dye-sensitized solar cells

Fabrication of Ag-loaded multi-walled TiO₂ nanotube arrays and their photocatalytic activity

Graphene oxide–chitosan composite hydrogels as broad-spectrum adsorbents for water purification

Defect-activated self-assembly of multilayered graphene paper: a mechanically robust architecture with high strength

Synergistic interactions between multi-walled carbon nanotubes and toxic hexavalent chromium

One pot synthesis of magnetite–silica nanocomposites: applications as tags, entrapment matrix and in water purification

All-solution-processed inverted polymer solar cells with low temperature, water-processable hybrid electron-collecting layers

Thermal-induced growth of RuO₂ nanorods from a binary Ru–Ti oxide composite and alteration in supercapacitive characteristics

Comparison of functionalized carbon nanofibers and multi-walled carbon nanotubes as supports for Fe–Co nanoparticles

The roles of passive layers in regulating the electrochemical behavior of Ti₅Si₃-based nanocomposite films

Effects of ZnO film growth route and nanostructure on electron transport and recombination in dye-sensitized solar cells

Single CdSe nanobelts-on-electrodes Schottky junction solar cells

In operando X-ray studies of the conversion reaction in Mn₃O₄ lithium battery anodes

CNT–Ni/SiC hierarchical nanostructures: preparation and their application in electrocatalytic oxidation of methanol

One-step ammonia hydrothermal synthesis of single crystal anatase TiO₂ nanowires for highly efficient dye-sensitized solar cells

In situ synthesis of silver nanostructures on magnetic Fe₃O₄@C core–shell nanocomposites and their application in catalytic reduction reactions

Graphene/carbon nanospheres sandwich supported PEM fuel cell metal nanocatalysts with remarkably high activity and stability

Nanowires with controlled porosity for hydrogen production

Facile synthesis and electrochemical properties of CoMn₂O₄ anodes for high capacity lithium-ion batteries

Enhanced performance of solution-processed solar cells based on porphyrin small molecules with a diketopyrrolopyrrole acceptor unit and a pyridine additive

One step synthesis of niobium doped titania nanotube arrays to form (N,Nb) co-doped TiO₂ with high visible light photoelectrochemical activity

Multifunctional films composed of carbon nanotubes and cellulose regenerated from alkaline–urea solution

A novel inorganic–organic hybridized intumescent flame retardant and its super flame retarding cyanate ester resins

Facile fabrication and some specific properties of polymeric/inorganic bilayer hybrid hollow spheres

Reduction of graphene oxide with l-lysine to prepare reduced graphene oxide stabilized with polysaccharide polyelectrolyte

CTAB-assisted synthesis of single-layer MoS₂–graphene composites as anode materials of Li-ion batteries

Synthesis of aligned carbon nanotube composite fibers with high performances by electrochemical deposition

Layer-by-layer assembled porous photoanodes for efficient electron collection in dye-sensitized solar cells

Ultra-fast sintered TiO₂ films in dye-sensitized solar cells: phase variation, electron transport and recombination

ZnO–GaN heterostructured nanosheets for solar energy harvesting: computational studies based on hybrid density functional theory

Imidazolium methanesulfonate as a high temperature proton conductor

Synthesis and characterization of nitrogen-doped graphene hydrogels by hydrothermal route with urea as reducing-doping agents

π-Conjugated polymer–Eu³⁺ complexes: versatile luminescent molecular probes for temperature sensing

Independent control of water retention and acid–base pairing through double-shelled microcapsules to confer membranes with enhanced proton conduction under low humidity

Assembling gold and platinum nanoparticles on resorcinarene modified graphene and their electrochemical applications

Decoration of basalt fibers with hybrid Fe₃O₄ microspheres and their microwave absorption application in bisphthalonitrile composites

An A–D–A small molecule based on the 3,6-dithienylcarbazole electron donor (D) unit and nitrophenyl acrylonitrile electron acceptor (A) units for solution processed organic solar cells

Template-free synthesis of hollow α-Fe₂O₃ microcubes for advanced lithium-ion batteries

A high-energy-density supercapacitor with graphene–CMK-5 as the electrode and ionic liquid as the electrolyte

Synthesis of PtCu₃ bimetallic nanoparticles as oxygen reduction catalysts via a sonochemical method

Ordered mesoporous nickel cobaltite spinel with ultra-high supercapacitance

Highly loaded CoO/graphene nanocomposites as lithium-ion anodes with superior reversible capacity

Long range structural and textural changes in [Zn(bdc)(ted)_0.5] upon spontaneous dispersion of LiCl and hysteretic adsorption and desorption of carbon dioxide and hydrogen

Back cover

Journal of Materials Chemistry A Vol - 1 Issue - 5

Independent control of water retention and acid–base pairing through double-shelled microcapsules to confer membranes with enhanced proton conduction under low humidity

Content Provider	Royal Society of Chemistry (RSC)
Author	Nie, Lingli Jiang, Zhongyi Wang, Jingtao Yue, Xiujun Wu, Hong Zhang, Zizhuo He, Guangwei
Copyright Year	2013
Abstract	Proton exchange membranes (PEM) with affordable and controllable proton conductivity under low humidity are crucial to the commercial application of PEM fuel cells. In this study, double-shelled polymer microcapsules bearing a carboxylic acid inner shell and imidazole outer shell (PMC-Ns) are synthesized via distillation–precipitation polymerization and then incorporated into a sulfonated poly(ether ether ketone) matrix to fabricate composite membranes. The inner shell renders the absorbed water of lower chemical potential and higher bound water content, yielding the composite membrane with enhanced water retention properties. The higher water uptake ensures composite membrane facilitated proton transfer via a vehicle mechanism and the lower water loss confers a reduced proton conductivity decline. The outer shell generates sulfonic acid–imidazole pairs within the membranes, which construct low-energy-barrier pathways to facilitate proton transfer via the Grotthuss mechanism. Under identical conditions, PMC-Ns endow much higher proton conductivity to composite membranes than the microcapsules with both carboxylic acid inner shell and outer shell, or both imidazole inner shell and outer shell. Particularly, incorporating 20 wt% PMC-Ns affords the composite membrane a 1.7 times increase in proton conductivity under 100% relative humidity (RH) and a 41.8 times increase in proton conductivity under 20% RH. Moreover, the methanol barrier property of the composite membranes is explored.
Starting Page	2267
Ending Page	2277
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	6
Journal	Journal of Materials Chemistry A
DOI	10.1039/c2ta00186a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Proton Polymer Carboxylic acid Imidazole Polymerization Ether Ketone Composite material Chemical potential Grotthuss mechanism Relative humidity Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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Enhanced water retention and stable dynamic water behavior of sulfonated poly(ether ether ketone) membranes under low humidity by incorporating humidity responsive double-shelled hollow spheres

Enhanced proton conductivity of multiblock poly(phenylene ether ketone)s via pendant sulfoalkoxyl side chains with excellent H₂/air fuel cell performance

Sulfonated nanocrystal cellulose/sulfophenylated poly(ether ether ketone ketone) composites for proton exchange membranes

Elucidating the Water and Methanol Dynamics in Sulfonated Polyether Ether Ketone Nanocomposite Membranes Bearing Layered Double Hydroxides

Block poly(arylene ether sulfone ketone)s containing densely sulfonated linear hydrophilic segments as proton conductive membranes

Sulfonated poly(ether ether ketone)/zirconium tricarboxybutylphosphonate composite proton-exchange membranes for direct methanol fuel cells

Proton conducting composite membranes from sulfonated polyether ether ketone and SiO$_{2}$

Preparation and Characterization of Sulfonated Poly (ether ether ketone)/Phosphated Zirconia Nanoparticles Composite Proton-conducting Membranes

Synthesis and Preparation of Composite Membranes for Direct Methanol Fuel Cells from Poly(Ether Ketone Quinolines)-Poly(Ether Ether Ketone) Blend and Nafion with Non- and Surface Coated Silicotungstic Acid

Independent control of water retention and acid–base pairing through double-shelled microcapsules to confer membranes with enhanced proton conduction under low humidity

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