Hybrid supercapacitors (battery-supercapacitor hybrid devices, HSCs) deliver high energy within seconds (excellent rate capability) with stable cyclability. One of the key limitations in developing high-performance HSCs is imbalance power capability between sluggish Faradaic lithium-intercalation anode and rapid non-Faradaic capacitive cathode. To solve this problem, we synthesize Nb2O5@carbon core-shell nanocyrstals (Nb2O5@C NCs) as high-power materials controlled crystalline phases...

Abstract Porous architectures are important in determining the performance of lithium–sulfur batteries (LSBs). Among them, multiscale porous architecutures highly desired to tackle limitations single‐sized architectures, and combine advantages different pore scales. Although a few carbonaceous materials with porosity employed LSBs, their nonpolar surface properties cause severe dissolution lithium polysulfides (LiPSs). In this context, structure design noncarbonaceous is required, but has...

Two-dimensional (2D) carbon nanosheets with micro- and/or mesopores have attracted great attention due to unique physical and chemical properties, but well-defined nanoporous tunable thickness pore size been rarely realized. Here, we develop a polymer-polymer interfacial self-assembly strategy achieve hierarchically porous (HNCNSs) by integrating the migration behaviors of immiscible ternary polymers block copolymer (BCP)-directed self-assembly. The balanced compatibility BCP allows BCP-rich...

We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g(-1)), stable cycle life compared the other bulk GeO2 electrodes. exhibits one of highest areal capacities (1.65 cm(-2)) among previously reported Ge- GeO2-based anodes. The superior electrochemical performance in arises from...

In order to achieve high-power and -energy anodes operating above 1.0 V (vs Li/Li+), titanium-based materials have been investigated for a long time. However, theoretically low lithium charge capacities of titanium-anodes required new types high-capacity anode materials. As candidate, TiNb2O7 has attracted much attention due the high theoretical capacity 387.6 mA h g–1. formation temperature phase resulted in large-sized crystals, thus resulting poor rate capability. Herein, ordered...

Abstract An ordered mesoporous tungsten‐oxide/carbon (denoted as m‐WO 3− x ‐C‐s) nanocomposite is synthesized using a simple one‐pot method polystyrene‐ block ‐poly(ethylene oxide) (PS‐ b ‐PEO) structure‐directing agent. The hydrophilic PEO interacts with the carbon and tungsten precursors (resol polymer WCl 6 ), PS converted to pores after heating at 700 °C under nitrogen flow. ‐C‐s has high Brunauer–Emmett–Teller (BET) surface area hexagonally pores. Because of its structure intrinsic...

We report a facile "one-pot" method for the synthesis of Sn-embedded carbon–silica (CS) mesostructured (nanostructured) composites through selective interaction resol (carbon precursor), tetraethylorthosilicate (TEOS), and tributylphenyltin (Sn precursor) with an amphiphilic diblock copolymer, poly(ethylene oxide-b-styrene), PEO-b-PS. A unique morphology transition from Sn nanowires to spherical nanoparticles embedded in CS framework has been obtained. Metallic species are homogeneously...

To promote the oxygen reduction reaction of metal-free catalysts, introduction porous structure is considered as a desirable approach because can enhance mass transport and host many catalytic active sites. However, most previous studies reported only half-cell characterization; therefore, on membrane electrode assembly (MEA) are still insufficient. Furthermore, effect doping-site position in has not been investigated. Here, we report synthesis highly catalysts MEAs by controlling pore size...

Hierarchically porous oxide materials have immense potential for applications in catalysis, separation, and energy devices, but the synthesis of these is hampered by need to use multiple templates associated complicated steps uncontrollable mixing behavior. Here we report a simple one-pot strategy inorganic with multiscale porosity. The precursor block copolymer are coassembled into an ordered mesostructure (microphase separation), while situ-polymerized organic forms organic-rich...

To overcome inherent limitations of molybdenum carbide (MoxC) for hydrogen evolution reaction (HER), i.e., low density active site and nonideal binding strength, we report the synthesis valence-controlled mesoporous MoxC as a highly efficient HER electrocatalyst. The procedure uses an interaction mediator (IM), which significantly increases by mediating between PEO-b-PS template Mo source. valence state is tuned systematic control environment around controlled heat treatment under air before...

This study describes the one-pot synthesis and single-cell characterization of ordered, large-pore (>30 nm) mesoporous carbon/silica (OMCS) composites with well-dispersed intermetallic PtPb nanoparticles on pore wall surfaces as anode catalysts for direct formic acid fuel cells (DFAFCs). Lab-synthesized amphiphilic diblock copolymers coassemble hydrophobic metal precursors well hydrophilic carbon silica precursors. The final materials have a two-dimensional hexagonal-type structure. Uniform...

A simple yet effective solvent mediated synthesis of nano-MOF with controlled polymorphism, size and morphology under ambient conditions is presented.

Mesocrystals-superstructures of crystalline nanoparticles that are aligned in a crystallographic fashion-are increasing interest for formation inorganic materials with complex and sophisticated morphologies to tailor properties without changing chemical composition. Here we report morphogenesis novel mesocrystal consisting nanoscale metal-organic frameworks (MOF) by using double hydrophilic block copolymer (DHBC) as crystal modulator. DHBC selectively prefers the metastable hexagonal kinetic...

Abstract Porous architectures play an important role in various applications of inorganic materials. Several attempts to develop mesoporous materials with controlled macrostructures have been reported, but they usually require complicated multiple‐step procedures, which limits their versatility and suitability for mass production. Here, a simple approach controlling the materials, without templates macropores, is reported. The solvent evaporation induces both macrophase separation via...

All aqueous multiphase systems have attracted significant attention recently, in particular water-in-water Pickering emulsions. In here, polydopamine nanoparticles (PDP) are investigated as stabilizers for dextran and poly(ethylene glycol) (PEG)-based Remarkably, stable emulsions obtained from the all-biocompatible materials that can be broken either via dilution or surfactant addition. Further cross-linking of PDP poly(acrylic acid) carbodiimide strengthens stability emulsion droplets a...

Metal fluorides (MFx) are one of the most attractive cathode candidates for Li ion batteries (LIBs) due to their high conversion potentials with large capacities. However, only a limited number synthetic methods, generally involving highly toxic or inaccessible reagents, currently exist, which has made it difficult produce well-designed nanostructures suitable cathodes; consequently, harnessing potential cathodic properties been challenge. Herein, we report new bottom-up method utilizing...

Mesoporous inorganic particles and hollow spheres are of increasing interest for a broad range applications, but synthesis approaches typically material specific, complex, or lack control over desired structures. Here it is reported how combining mesoscale block copolymer (BCP) directed materials self-assembly macroscale spinodal decomposition can be employed in multicomponent BCP/hydrophilic precursor blends with homopolymers to prepare mesoporous controlled meso- macrostructures. The...

Anisotropic self-assembly of ternary-phase blends allows the synthesis bowl-like mesoporous inorganic particles and nanosheets.

Abstract Enhancing the accessibility and utilization of active sites through mesopores in carbon anode materials is crucial for developing high‐power potassium‐ion hybrid supercapacitors (PIHCs). Here, a multiscale phase separation method combining block copolymer (BCP) microphase‐ homopolymer (HP) macrophase‐separation utilized to produce two model with controlled mesopore orientation: open‐end ( oe ‐MCS) closed‐end mesoporous sphere ce ‐MCS). BCPs form identical cylindrical micelles, HPs...

The microstructure of hard carbon, including interlayer spacing, the degree graphitization, and doped heteroatoms, has a significant impact on K+ storage capability carbon anodes in potassium-ion hybrid supercapacitors (PIHCs). However, previously reported microstructural engineering methods typically involve complex, time-consuming, expensive multistep processes. Herein, we report simple pyrolysis-guided materials using cost-effective coffee waste (CW) as recycled single source for...