Themed collection 2014 Journal of Materials Chemistry A Hot Articles
Application of alkyne metathesis in polymer synthesis
We review the recent progress in the development of acyclic diyne metathesis polymerization (ADIMET) and ring-opening alkyne metathesis polymerization (ROAMP).
NiCo2O4-based materials for electrochemical supercapacitors
NiCo2O4-based materials have become a new class of energy storage materials for electrochemical supercapacitors, which manifest remarkable electrochemical performances.
Recent advances in the potential applications of bioinspired superhydrophobic materials
This review highlights the recent advances made in the potential applications of superhydrophobic materials.
Double junction polymer solar cells
Tandem polymer solar cells can achieve significantly higher efficiencies by reducing the absorption and thermalization loss.
Structuring materials for lithium-ion batteries: advancements in nanomaterial structure, composition, and defined assembly on cell performance
The structure, arrangement and composition of nanomaterials can greatly influence the performance of Li-ion batteries and emerging alternatives.
Layered transition metal dichalcogenides for electrochemical energy generation and storage
Layered transition metal dichalcogenides (TMDs) (MoS2, MoSe2, WS2, WSe2, etc.) are a chemically diverse class of compounds having remarkable electrochemical properties.
Functionalized mesoporous structured inorganic materials as high temperature proton exchange membranes for fuel cells
High temperature proton exchange membrane fuel cells based on functionalized mesoporous silica nanocomposite membranes.
Recent progress on carbon-based support materials for electrocatalysts of direct methanol fuel cells
This review summarizes recent significant progress in the fabrication and applications of carbon-based anode catalysts for direct methanol fuel cells.
Metal-free hybrid seawater fuel cell with an ether-based electrolyte
A new metal-free hybrid seawater fuel cell was proposed and designed, which used flowing seawater as the cathode and a hard carbon anode.
MoS2 nanosheet/Mo2C-embedded N-doped carbon nanotubes: synthesis and electrocatalytic hydrogen evolution performance
Ultrathin MoS2 nanosheets were grown on Mo2C-embedded N-doped carbon nanotubes through in situ solid and subsequent hydrothermal reactions, showing excellent electrocatalytic activity for hydrogen evolution.
Synthesis of 3D cauliflower-fungus-like graphene from CO2 as a highly efficient counter electrode material for dye-sensitized solar cells
3D cauliflower-fungus-like graphene (CFG) with high conductivity and excellent catalytic activity is directly synthesized from CO2. A DSSC with a 3D CFG counter electrode exhibits a high energy conversion efficiency of 8.1%, which is better than that of a Pt-based DSSC. This provides a novel approach not only to synthesize free-standing 3D graphene for solar cells, but also to control CO2 emission.
A novel gel-based approach to wastewater treatment – unique one-shot solution to potentially toxic metal and dye removal problems
This communication reports the development of a unique gel-based adsorbent for wastewater treatment using a new low molecular weight gelator.
Use of a commercially available nucleating agent to control the morphological development of solution-processed small molecule bulk heterojunction organic solar cells
The nucleating agent DMDBS is used to modulate the crystallization of solution-processed small molecule donor molecules in bulk heterojunction photovoltaic devices.
High efficiency organic/a-Si hybrid tandem solar cells with complementary light absorption
Organic/a-Si hybrid tandem solar cells with complementary absorption exhibit a PCE of 7.5% with FF of 72.3% and Voc of 1.51 V.
Highly transparent and flexible triboelectric nanogenerators: performance improvements and fundamental mechanisms
Transparent, flexible and highly efficient power sources are essential components of mobile electronics and optoelectronic devices.
Tough BMIMCl-based ionogels exhibiting excellent and adjustable performance in high-temperature supercapacitors
A supercapacitor with a tough ionogel as the integrated electrolyte and separator exhibits ideal electrochemical performance and excellent stability at high temperatures.
High performance Pt-free cathode catalysts for polymer electrolyte membrane fuel cells prepared from widely available chemicals
A high performance Pt-free cathode catalyst for polymer electrolyte fuel cells has been synthesized by the multi-step pyrolysis of polyimide fine particles with a diameter of about 100 nm.
Small-molecule azomethines: organic photovoltaics via Schiff base condensation chemistry
Small-molecule donor materials can be prepared in one step using simple condensation chemistry.
Nanostructured conductive polypyrrole hydrogels as high-performance, flexible supercapacitor electrodes
A spongy polypyrrole based conductive hydrogel with chemically tunable structures and electrochemical characteristics was developed for highly flexible solid-state supercapacitors.
A high conductivity oxide–sulfide composite lithium superionic conductor
A composite of LLZO and LPS inherits the excellent processability of the sulfide and exceeds the conductivity of parent components.
A simple, low-cost CVD route to thin films of BiFeO3 for efficient water photo-oxidation
BiFeO3 films, grown via a novel AACVD process from a single-source precursor, are shown to be highly active photocatalysts for water oxidation under solar irradiation.
Optical properties of organometal halide perovskite thin films and general device structure design rules for perovskite single and tandem solar cells
The optical constants of a CH3NH3PbI3−xClx perovskite thin film were acquired for the first time.
The effect of carbon counter electrodes on fully printable mesoscopic perovskite solar cells
The size effect of graphite on hole-conductor-free fully printable mesoscopic perovskite solar cells was studied.
Significance of wall number on the carbon nanotube support-promoted electrocatalytic activity of Pt NPs towards methanol/formic acid oxidation reactions in direct alcohol fuel cells
The inner walls of CNTs have a significant effect on the electrocatalytic activity of supported Pt NPs for MOR/FAOR in fuel cells.
Preparation of MWCNTs grafted with polyvinyl alcohol through Friedel–Crafts alkylation and their composite fibers with enhanced mechanical properties
The MWCNTs dispersion was improved by grafting PVA through the Friedel–Crafts alkylation and thus the mechanical properties of the PVA/MWCNTs fibers were increased.
Facile surfactant-free synthesis and characterization of Fe3O4@3-aminophenol–formaldehyde core–shell magnetic microspheres
Fe3O4@3-aminophenol–formaldehyde (Fe3O4@APF) core–shell resin polymer magnetic nanocomposites were fabricated by the polymerization of 3-aminophenol and formaldehyde as efficient absorbants for methyl blue.
Site-specific catalytic activity in exfoliated MoS2 single-layer polytypes for hydrogen evolution: basal plane and edges
The non-metallic distorted 1T phase is the most HER active polytype in exfoliated single-layer MoS2.
Structural and oxygen-transport studies of double perovskites PrBa1−xCo2O5+δ (x = 0.00, 0.05, and 0.10) toward their application as superior oxygen reduction electrodes
Double perovskites PrBa1−xCo2O5+δ with a stable tetragonal symmetrical structure and high oxygen vacancy concentration, demonstrate a superior electrochemical performance as prospective cathode materials for IT-SOFCs.
P-type NaxNi0.22Co0.11Mn0.66O2 materials: linking synthesis with structure and electrochemical performance
A systematic study on how to link the synthesis temperature with the structure and electrochemical performance of P3- and P2-type NaxNi0.22Co0.11Mn0.66O2 was conducted.
Highly nitrogen-doped mesoscopic carbons as efficient metal-free electrocatalysts for oxygen reduction reactions
Metal-free highly N-doped mesoscopic carbons with active quaternary and pyridinic-N species show superior electrocatalytic activity for oxygen reduction reaction.
Fabrication of symmetric supercapacitors based on MOF-derived nanoporous carbons
We design novel symmetric supercapacitors based on nanoporous carbons (NPCs) by direct carbonization of Zn-based metal–organic frameworks (MOFs).
Roll-coating fabrication of flexible large area small molecule solar cells with power conversion efficiency exceeding 1%
We demonstrate, for the first time, efficient roll-coating fabrication of flexible large area small molecule bulk heterojunction solar cells with PCE exceeding 1%.
Structural enhancement of Na3V2(PO4)3/C composite cathode materials by pillar ion doping for high power and long cycle life sodium-ion batteries
Structurally stabilized Na3V2(PO4)3/C composite cathode materials by pillar ion doping exhibit high Na capacities, excellent rate properties and stable cycling performances.
Hollow Ni–Co–B amorphous alloy nanospheres: facile fabrication via vesicle-assisted chemical reduction and their enhanced catalytic performances
Hollow Ni–Co–B nanospheres are easily achieved through a vesicle-assisted chemical reduction approach. Such a material can be used to conduct one-pot hydrogenation of 2-ethyl-2-hexenaldehyde to 2-ethyl-1-hexanol.
Theoretical design of MoO3-based high-rate lithium ion battery electrodes: the effect of dimensionality reduction
By means of density functional theory computations, we systematically investigated the behavior of lithium (Li) adsorption and diffusion on MoO3 with different dimensions: including three-dimensional (3D) bulk, two-dimensional (2D) double-layer, 2D monolayer and one-dimensional (1D) nanoribbons.
Facile one step method realizing scalable production of g-C3N4 nanosheets and study of their photocatalytic H2 evolution activity
We report a facile one step method for fabricating g-C3N4 nanosheets with enhanced photocatalytic H2 evolution activity.
Colorimetric strips for visual lead ion recognition utilizing polydiacetylene embedded nanofibers
A portable, sensitive and selective colorimetric strip for naked-eye recognition of Pb2+ utilizing solid-phase polydiacetylene embedded electrospun polyacrylonitrile nanofibers.
Rational synthesis of superparamagnetic core–shell structured mesoporous microspheres with large pore sizes
Superparamagnetic core–shell structured mesoporous microspheres synthesized via a co-surfactant templating approach under acidic conditions for the extraction of pollutants.
Marked effects of indolyl vs. indolinyl substituent on solid-state structure, carrier mobility and photovoltaic efficiency of asymmetrical squaraine dyes
The tiny variations between the two asymmetrical squaraines molecular structure dramatically affect their solid-state structure, carrier mobility and photovoltaic performance.
Interfacially reinforced unsaturated polyester composites by chemically grafting different functional POSS onto carbon fibers
Monofunctional and multifunctional POSS were successfully grafted on a carbon fiber (CF) surface to enhance the interfacial strength of CF reinforced unsaturated polyester resin (UPR) composites.
Battery/supercapacitor hybrid via non-covalent functionalization of graphene macro-assemblies
A 2.9-fold increase in electrical energy storage capacity (up to 23 W h kg−1) is achieved in battery/supercapacitor hybrid electrodes through non-covalent modification of binder-free, ultra-high surface area graphene macro-assemblies with redox-active anthraquinone. These hybrid electrodes demonstrate battery-like energy density, supercapacitor-like power performance, and superb long-term stability.
Revisiting Li3V2(PO4)3 as an anode – an outstanding negative electrode for high power energy storage devices
A carbon coated Li3V2(PO4)3 nanomaterial obtained by an ionic liquid-assisted synthesis is presented as an excellent negative electrode material for high power energy storage devices.
New manifold two-dimensional single-layer structures of zinc-blende compounds
Two-dimensional (2D) materials open up tremendous opportunities for attractive applications in next-generation flexible and transparent nanoelectronic devices.
A water-based and high space-time yield synthetic route to MOF Ni2(dhtp) and its linker 2,5-dihydroxyterephthalic acid
Highway to MOF Ni 2 (dhtp)! 1 hour in boiling water under atmospheric pressure; a cheap synthesis of the linker is also reported.
Tuning electronic and optical properties of MoS2 monolayer via molecular charge transfer
TCNQ, TCNE, TTF and BV can reduce band gap of MoS2 monolayer, and TNCQ can enhance the infrared optical absorption.
Expeditious fabrication of flower-like hierarchical mesoporous carbon superstructures as supercapacitor electrode materials
Flower-like hierarchical mesoporous carbon superstructures (FMCS), fabricated by one-pot hydrothermal reaction, exhibit outstanding supercapacitive performances.
Effective thermodynamic alteration to Mg(NH2)2–LiH system: achieving near ambient-temperature hydrogen storage
Introduced X to 2Mg(NH2)2–3LiH system, thermodynamically allowed hydrogen release temperatures at 0.1 MPa equilibrium pressure are 333, 320, 337 K.
Highly selective and reproducible detection of picric acid in aqueous media, based on a polydiacetylene microtube optical waveguide
Development of novel one-dimensional (1D) solid sensors for the highly selective and sensitive detection of 2,4,6-trinitrophenol (TNP) in aqueous media has attracted considerable attention.
Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires
Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires were fabricated.
Branch-structured Bi2S3–CNT hybrids with improved lithium storage capability
A hierarchical, branched Bi2S3–CNT hybrid was fabricated through a facile sonochemical approach which exhibited outstanding Li-storage capability.
Relaxation is the key to longer life: suppressed degradation of P3HT films on conductive substrates
P3HT degradation is shown to be suppressed when it is on conductive substrates. This ‘substrate effect’ is more significant than maintaining an inert environment.
Non-precious electrocatalysts synthesized from metal–organic frameworks
Fe-containing MOF with a structure different from ZIFs is used as the sole precursor for ORR electrocatalyst preparation.
Conversion of polystyrene foam to a high-performance doped carbon catalyst with ultrahigh surface area and hierarchical porous structures for oxygen reduction
A high performance carbon-based ORR catalyst with ultra-high surface area and hierarchical porous structures was derived from polystyrene foam waste.
Lithium–tellurium batteries based on tellurium/porous carbon composite
For the first time, lithiation/delithiation behavior of tellurium at room temperature was investigated using tellurium/porous carbon (Te/C) composite electrodes.
Metal organic frameworks-derived Co3O4 hollow dodecahedrons with controllable interiors as outstanding anodes for Li storage
Co3O4 hollow dodecahedrons with controllable interiors are prepared through direct pyrolysis of ZIF-67 and exhibit high performance for Li-ion storage.
When long bis(pyrazolates) meet late transition metals: structure, stability and adsorption of metal–organic frameworks featuring large parallel channels
Under the mild conditions of 298 K and 10 bar, [Fe2(BPEB)3] adsorbs a considerable amount of CO2, up to 40% wt.
Enhancement of hydroxide conductivity by the di-quaternization strategy for poly(ether ether ketone) based anion exchange membranes
Multiple quaternary ammonium groups on pendent side chains of poly(ether ether ketone) improve ion conductive channels and hydroxide conductivity.
Effect of bulk and surface structural changes in Li5FeO4 positive electrodes during first charging on subsequent lithium-ion battery performance
Specific charge–discharge properties of Li5FeO4 positive electrodes with regard to bulk and surface structural changes during the first charging process analyzed by synchrotron techniques including XRD, XANES, and EXAFS.
C-axis preferentially oriented and fully activated TiO2 nanotube arrays for lithium ion batteries and supercapacitors
We report the fabrication of long titanium dioxide nanotube arrays with highly c-axis preferentially oriented crystallization and a high concentration of oxygen vacancies by second anodization in ethylene glycol and annealing under poor-oxygen conditions.
A shape-deformable and thermally stable solid-state electrolyte based on a plastic crystal composite polymer electrolyte for flexible/safer lithium-ion batteries
A new class of shape-deformable and thermally stable solid-state electrolyte based on a plastic crystal composite polymer electrolyte for flexible/safer lithium-ion batteries is demonstrated.
Electrical properties and microcosmic study on compound defects in Ga-containing thermoelectric skutterudites
Microscopic analysis reveals the dual-site occupancy character of Ga in skutterudites which results in abnormal electrical properties.
Rapid facile synthesis of Cu2ZnSnS4 nanocrystals
A method for rapid synthesis of 2–40 nm diameter nanocrystal dispersions of the emerging sustainable thin-film solar absorber copper zinc tin sulfide is reported: the average crystals size is controlled by varying the synthesis temperature between 150 °C and 340 °C. Films cast from larger nanocrystals, are crack-free and suitable for making thin film solar cells.
Multifunctional foams derived from poly(melamine formaldehyde) as recyclable oil absorbents
Ultralight, fire-resistant, and compressible foams as recyclable oil absorbents are facilely prepared from cheap melamine resins.
Study of a magnetic-cooling material Gd(OH)CO3
The magnetocaloric effect of orthorhombic Gd(OH)CO3 has been experimentally studied, which exhibits −ΔSm up to 66.4 J kg−1 K−1 (355 mJ cm−3 K−1) for ΔH = 7 T and T = 1.8 K.
An ultrasound-assisted deposition of NiO nanoparticles on TiO2 nanotube arrays for enhanced photocatalytic activity
NiO–TiO2 NTAs were synthesized using a facile ultrasound-assisted deposition technique and displayed an effectively enhanced photo-conversion efficiency and photocatalytic activity compared with TiO2 NTAs.
Fast lithium transport in PbTe for lithium-ion battery anodes
PbTe as an anode material for lithium-ion batteries was studied and found to exhibit stable cycling performance at high rates. It is believed that the formation of Li2Te is responsible for the improved rate capability.
Enhanced open-circuit voltage in polymer solar cells by dithieno[3,2-b:2′,3′-d]pyrrole N-acylation
N-Acylation of dithieno[3,2-b:2′,3′-d]pyrrole (DTP) leads to enhanced open-circuit voltages and hence higher power conversion efficiencies in polymer solar cells.
Polydopamine particles for next-generation multifunctional biocomposites
Polydopamine particles were used as fillers for constructing multifunctional composites for the first time.
TAGS-related indium compounds and their thermoelectric properties – the solid solution series (GeTe)xAgInySb1−yTe2 (x = 1–12; y = 0.5 and 1)
Solid solutions of GeTe, AgInTe2 and optionally AgSbTe2 (accessible via high-pressure synthesis or by quenching, depending on the phases’ In content) exhibit remarkable thermoelectric properties that clearly reflect transitions between metastable and stable phases.
The influence of microstructure on charge separation dynamics in organic bulk heterojunction materials for solar cell applications
We show a strong correlation of the charge separation dynamics by electron and hole transfer with the solid-state microstructure of organic bulk heterojunction materials.
About this collection
This on-going web collection features all the articles published in Journal of Materials Chemistry A in 2014 marked as HOT, as recommended by referees. A selection of these is posted weekly on the Journal of Materials Chemistry Blog. Congratulations to all the authors whose articles are featured!