The performance of chemically intercalated V2O5 was found to strongly depend on the interlayer spacing, which is related radius hydrated metal ion, can be readily tuned by using different metals. We report a layered Mg2+-intercalated as cathode material for aqueous ZIBs. large Mg2+ (∼4.3 Å, compared with 3.8 Å commonly used Li+) results in an spacing 13.4 (against 11.07 Li+-intercalated V2O5), allows efficient Zn2+ (de)insertion. As result, obtained porous Mg0.34V2O5·0.84H2O cathodes work...

Anode-free metal batteries can in principle offer higher energy density, but this requires them to have extraordinary Coulombic efficiency (>99.7%). Although Zn-based are promising for stationary storage, the parasitic side reactions make anode-free difficult achieve practice. In work, a salting-in-effect-induced hybrid electrolyte is proposed as an effective strategy that enables both highly reversible Zn anode and good stability compatibility toward various cathodes. The as-prepared also...

Aqueous Zn-ion batteries present low-cost, safe, and high-energy battery technology but suffer from the lack of suitable cathode materials because sluggish intercalation kinetics associated with large size hydrated zinc ions. Herein we report an effective general strategy to transform inactive hosts into efficient Zn2+ storage through energy tuning. Using MoS2 as a model system, show both experimentally theoretically that even originally poor diffusivity can allow fast diffusion. Through...

Metal organic framework (MOF)-derived Co-doped nickel selenide/C hybrid nanostructure supported on Ni foam can efficiently catalyze the overall water splitting.

Salinity-gradient is emerging as one of the promising renewable energy sources but its conversion severely limited by unsatisfactory performance available semipermeable membranes. Recently, nanoconfined channels, osmotic conduits, have shown superior to conventional technologies. Here, ion selective nanochannels in lamellar Ti3C2Tx MXene membranes are reported for efficient power harvesting. These subnanometer channels enable cation-selective passage, assisted with tailored surface terminal...

Efficient water splitting demands highly active, low cost, and robust electrocatalysts. In this study, we report the synthesis of penroseite (Ni,Co)Se2 nanocages anchored on 3D graphene aerogel using Prussian blue analogues as a precursor further their applications in overall electrolysis. The synergy between high activity good conductivity leads to superior performance hybrid toward basic solutions. (Ni,Co)Se2-GA only requires cell voltage 1.60 V reach current density 10 mA cm–2, making...

Abstract Herein we report the control synthesis of lepidocrocite VOOH hollow nanospheres and further their applications in electrocatalytic water splitting for first time. By tuning surface area nanospheres, optimal performance can be achieved with low overpotentials 270 mV oxygen evolution reaction (OER) 164 hydrogen (HER) at 10 mA cm −2 1 m KOH, respectively. Furthermore, when used as both anode cathode overall splitting, a cell voltage 1.62 V is required to reach current density , making...

Abstract In this work, a simple lignin‐based laser lithography technique is developed and used to fabricate on‐chip microsupercapacitors (MSCs) using 3D graphene electrodes. Specifically, lignin films are transformed directly into laser‐scribed (LSG) electrodes by one‐step CO 2 irradiation. This step followed water lift‐off process remove unexposed lignin, resulting in with the designed electrode patterns. The LSG hierarchically porous, electrically conductive (conductivity up 66.2 S cm −1...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSolution Growth of Vertical VS2 Nanoplate Arrays for Electrocatalytic Hydrogen EvolutionHanfeng Liang‡, Huanhuan Shi‡, Dongfang Zhang‡, Fangwang Ming‡, Rongrong Wang‡, Junqiao Zhuo§, and Zhoucheng Wang*‡View Author Information‡ College Chemistry Chemical Engineering, Xiamen University, 361005, China§ Molecular Peking Beijing 100871, China*E-mail: [email protected]Cite this: Chem. Mater. 2016, 28, 16, 5587–5591Publication Date (Web):July 27,...

Metallic Zn is considered as an ideal anode while its widespread use in rechargeable aqueous batteries still faces many challenges, mostly associated with the dendritic growth and corrosion of side reactions. In this work, we demonstrate that a TiN protective coating layer preferential (200) orientation can effectively suppress both reactions; more interestingly, it regulate pattern byproduct (zinc hydroxide sulfate or ZHS) by inducing lateral growth. As result, reversible plating/stripping...

Abstract 2D heterostructured materials combining ultrathin nanosheet morphology, defined pore configuration, and stable hybrid compositions, have attracted increasing attention for fast mass transport charge transfer, which are highly desirable features efficient energy storage. Here, the chemical space of 2D–2D heterostructures is extended by covalently assembling covalent organic frameworks (COFs) on MXene nanosheets. Unlike most COFs, generally produced as solid powders, COF‐LZU1 grows in...

Clean water supply in off-grid locations remains a stumbling stone for socio-economic development remote areas where solar energy is abundant. In this regard, several technologies have already introduced various solutions to the freshwater predicament; however, most of them are either costly or complex operate. Nonetheless, photothermal membrane distillation (PMD) has emerged as promising candidate with great potential be autonomously driven by energy. Instead using energy-intensive bulk...

Electrocatalytic hydrogenation (ECH) of organics using water as hydrogen donors has been regarded a green organic reduction technique to replace traditional chemical reactions that use sacrificial chemicals. The development ECH process provides potential applications in the production value-added chemicals owing its low energy consumption, pollution, high safety, and superior sustainability. However, application is limited by conversion rate poor selectivity toward desired products....

Synthesis of nanoscale metal-organic frameworks (MOFs) is a highly challenging task because conventional soluble metal salt precursors are not easy to manipulate spatially, thus normally leading bulk MOFs. In the present work, V2CTx MXene demonstrated for first time as precursor fabricate two-dimensional (2D) MOF nanosheets, whose thickness (6 18 nm) can be tuned by varying reaction temperature. The electronegative surface atoms and sufficient accessible attacking sites ligands responsible...

Abstract Renewable energy sources such as solar, wind, and hydro hold the promise to meet huge demands of future at no environmental cost. Harvesting utilization these energies require efficient low cost conversion storage devices, whose performance essentially depends on properties electrode materials. The materials are greatly affected by synthesis methods can be tuned chemical modifications. Many approaches have therefore been developed toward this end. Among them, plasma has attracted...

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...

MXenes are a promising class of two-dimensional materials with several potential applications, including energy storage, catalysis, electromagnetic interference shielding, transparent electronics, and sensors. Here, we report novel Mo2CTx MXene sensor for the successful detection volatile organic compounds (VOCs). The proposed is chemiresistive device fabricated on Si/SiO2 substrate using photolithography. impact various process conditions performance evaluated. VOCs, such as toluene,...

Abstract Laser scribed graphene (LSG) electrodes hold great potential as supercapacitor electrodes. However, the rate performance of LSGs has been limited by micropore‐dominated electrode structure. Here, a new method is proposed to prepare LSG with 3D porous framework dominated meso‐ and macro‐pores, property that enables exceptional performance. The process uses amorphous carbon nanospheres (CNS) precursors, which, after laser scribing, are transformed into highly turbostratic graphitic...