In pursuing higher energy density with no sacrifice of power density, a supercapacitor-battery hybrid storage device—combining an electrochemical double layer capacitance (EDLC) type positive electrode Li-ion battery negative electrode—has been designed and fabricated. Graphene is introduced to both electrodes: Fe3O4/graphene (Fe3O4/G) nanocomposite high specific capacity as material, graphene-based three-dimensional porous carbon material (3DGraphene) surface area (∼3355 m2 g−1) material....

Metal oxides (MOs) have been widely investigated as promising high-capacity anode material for lithium ion batteries, but they usually exhibit poor cycling stability and rate performance due to the huge volume change induced by alloying reaction with lithium. In this article, we present a double protection strategy fabricating two-dimensional (2D) core-shell nanostructure improve electrochemical of metal in storage. The 2D architecture is constructed confining well-defined graphene based...

Because of advantages such as excellent electronic conductivity, high theoretical specific surface area, and good mechanical flexibility, graphene is receiving increasing attention an additive to improve the conductivity sulfur cathodes in lithium-sulfur (Li-S) batteries. However, not effective substrate material confine polysulfides stable cycling. Here, we designed synthesized a graphene-based layered porous carbon for impregnation cathode Li-S battery. In this composite, thin layer...

Abstract Dual‐ion batteries (DIBs) have attracted increasing attention owing to their merits of high working voltage, low cost, and especially environmental friendliness. However, the cycling stability most DIBs is still unsatisfying due decomposition conventional liquid carbonate electrolytes under voltages. Exploration gel polymer (GPEs) with good electrochemical at voltage a possible strategy optimize stability. A high‐performance flexible DIB based on poly(vinylidene fluoride‐hexafluoro...

A simple synthesis method to prepare pure SnSe2 nanosheet anodes for Na ion batteries is reported. The 2D sheets achieve a stable and reversible specific capacity of 515 mA h g-1 after 100 cycles, with excellent rate performance. sodiation desodiation process in this anode material shown occur via combination conversion alloying reactions. As service our authors readers, journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized...

Abstract Although potassium‐ion batteries (KIBs) have been considered to be promising alternatives conventional lithium‐ion due large abundance and low cost of potassium resources, their development still stays at the infancy stage lack appropriate cathode anode materials with reversible insertion/extraction as well good rate cycling performance. Herein, a novel dual‐carbon battery based on electrolyte (named K‐DCB), utilizing expanded graphite material mesocarbon microbead is developed. The...

Better than sliced bread: Layered two-dimensional graphene-based conjugated microporous polymers, which exhibit high surface areas and fluorescence quenching, can be prepared by a graphene-mediated Sonogashira–Hagihara coupling. Upon thermal pyrolysis, these porous polymers are readily converted into carbon materials with intriguing physical electrochemical properties (see scheme; pink spheres=thiophene, thiazole, or pyridine units).

Abstract The ever‐growing market of portable electronic devices and electric vehicles has significantly stimulated research interests on new‐generation rechargeable battery systems with high energy density, satisfying safety low cost. With unique potentials to achieve density cost, batteries based metal anodes are capable storing more via an alloying/de‐alloying process, in comparison traditional graphite intercalation/de‐intercalation process. However, the drawbacks such as initial capacity...

The low Coulombic efficiency and serious safety issues resulting from uncontrollable dendrite growth have severely impeded the practical applications of lithium (Li) metal anodes. Herein we report a stable quasi-solid-state Li battery by employing hierarchical multifunctional polymer electrolyte (HMPE). This hybrid was fabricated via in situ copolymerizing 1-[3-(methacryloyloxy)propylsulfonyl]-1-(trifluoromethanesulfonyl)imide (LiMTFSI) pentaerythritol tetraacrylate (PETEA) monomers...

Abstract Potassium‐ion batteries based on conversion/alloying reactions have high potential applications in new‐generation large‐scale energy storage. However, their are hindered by inherent large‐volume variations and sluggish kinetics of the conversion/alloying‐type electrode materials during repeated insertion extraction bulky K + ions. Although some efforts been focused this issue, reported potassium‐ion still suffer from poor cycling lifespans. Here, a superior stable antimony selenide...

Abstract Sodium‐ion batteries (SIBs) reflect a strategic move for scalable and sustainable energy storage. The focus on high‐entropy (HE) cathode materials, particularly layered oxides, has ignited scientific interest due to the unique characteristics effects tackle their shortcomings, such as inferior structural stability, sluggish reaction kinetics, severe Jahn‐Teller induced lattice distortion, poor oxygen reversibility at high voltage. This review focuses oxide highlighting fundamentals,...

Recently, we have developed a boron based electrolyte system with outstanding electrochemical performance, formed through the reaction of tri(3,5-dimethylphenyl)borane (Mes3B) and PhMgCl in THF, for rechargeable magnesium batteries. In this paper, main components equilibria unique solutions are identified by NMR, single-crystal XRD, etc. The results prove that contain various species, such as Mg2Cl3+, MgCl+, Ph2Mg tetracoordinated anion [Mes3BPh]−. Fluorescence spectra Raman spectroscopy...

FeS nanoparticles embedded in porous carbon matrix with unique structure was successfully synthesized and shows impressive lithium ion battery performances.

Abstract It is highly desirable to develop electroactive organic materials and their derivatives as green alternatives of cathodes for sustainable cost‐effective lithium‐ion batteries (LIBs) in energy storage fields. Herein, compact two‐dimensional coupled graphene porous polyaryltriazine‐derived frameworks with tailormade pore structures are fabricated by using various molecular building blocks under ionothermal conditions. The nanosheets display nanoscale thickness, high specific surface...

Flexible 2D inorganic MoS 2 and organic g‐C 3 N 4 hybrid thin film photodetectors with tunable composition photodetection properties are developed using simple solution processing. The films fabricated on paper substrate show broadband suitable for both UV visible light good responsivity, detectivity, reliable rapid photoswitching characteristics comparable to monolayer devices. This excellent performance is retained even after the severely deformed at a bending radius of ≈2 mm hundreds...

Abstract The dual‐ion battery (DIB) system has attracted great attention owing to its merits of low cost, high energy, and environmental friendliness. However, the DIBs based on sodium‐ion electrolytes are seldom reported due lack appropriate anode materials for reversible Na + insertion/extraction. Herein, a new DIB named as MoS 2 /C‐G using penne‐like /C nanotube expanded graphite cathode is constructed optimized first time. hierarchical provides (002) interlayer spacing 2H‐MoS , which...

A facile method is used to prepare a series of high-performance Ni/SiO_x/nitrogen-doped carbon ternary anodes for lithium-ion batteries.

Hierarchical T-Nb₂O₅ nanostructure has been firstly investigated as anode material for potassium-ion battery with fast kinetics, contributing to superior electrochemical performance of potassium dual-ion battery.

Abstract The current Na + storage performance of carbon‐based materials is still hindered by the sluggish ion transfer kinetics and low capacity. Graphene its derivatives have been widely investigated as electrode in energy conversion systems. However, anode for sodium‐ion batteries (SIBs), severe π–π restacking graphene sheets usually results compact structure with a small interlayer distance long distance, thus leading to capacity poor rate capability. Herein, partially reduced holey oxide...

Abstract Conventional graphite anodes can hardly intercalate sodium (Na) ions, which poses a serious challenge for developing Na‐ion batteries. This study details novel method that involves single‐step laser‐based transformation of urea‐containing polyimide into an expanded 3D graphene anode, with simultaneous doping high concentrations nitrogen (≈13 at%). The versatile nature this laser‐scribing approach enables direct bonding the anode to current collectors without need binders or...

Aqueous zinc ion batteries (A-ZIBs) have been used as new alternative for grid-scale electrochemical energy storage because of their low cost and environmental protection. Finding a suitable economical cathode material, which is needed to achieve high density long cycle stability, one the most important arduous challenges at present stage. Potassium manganese hexacyanoferrate (KMHCF) kind Prussian blue analogue. It has advantages large 3D frame structure that can accommodate...