Insight into demand-driven preparation of single-atomic mediators for lithium–sulfur batteries

Lithium-sulfur(Li-S) batteries have attracted considerable attention as one of the most appealing energy storage systems.Strenuous efforts have been devoted to tackling the tremendous challenges,mainly pertaining to the severe shuttle effect,sluggish redox kinetics and lithium dendritic growth.Single-atomic mediators as promising candidates exhibit impressive performance in addressing these intractable issues.Related research often utilizes a trial-and-error approach,proposing solutions to fabri...     

Recent advances in carbon-based materials for electrochemical CO2 reduction reaction

The increase of atmospheric CO₂ concentration has caused many environmental issues. Electrochemical CO₂ reduction reaction（CO₂RR） has been considered as a promising strategy to mitigate these challenges. The electrocatalysts with a low overpotential, high Faradaic efficiency, and excellent selectivity are of great significance for the CO₂RR. Carbon-based materials including metal-free carbon catalysts and metal-based carbon catalysts have shown great p...     

Interfacial Degradation and Optimization of Li-rich Cathode Materials

High-energy and safe lithium ion batteries(LIBs)are in increasing need as the rapid development of electronic devices,electric vehicles,as well as energy storage station.Li-rich oxides have attracted a lot of attention due to their high capacity and low cost as cathode material for LIBs.However,they still suffer from the vulnerable cathode/electrolyte interface,which presents the huge challenges of surface degradation and gas release,particularly at high state of charge.Some issues of Li-rich cathode materials,such as moderate cycle stability and voltage decay,are in tight connection with electrode-electrolyte interfacial side reactions.Research in the area of interfacial degradation mechanism and optimization strategies is of great significance as for Li-rich cathode,and extensive efforts have been poured.This review aims to understand the degradation mechanism of Li-rich cathode materials,and summarize the corresponding valuable and effective optimization strategies.Based on these considerations,we also have discussed the remaining challenges and the future research direction.     

Zinc-mediated reactions on salicylaldehyde for Botrytis cinerea control

Botrytis cinerea is a necrotrophic fungusth at a ffects various plant species.Chemical control is an ecessity and as much as possible,eco-friendly conditions and bioresources to obtain these chemicals should be used.In this context,a series of products w as obtained from salicylaldehyde using zinc as a powerful reagent and tested for antifungal activity against Botrytis cinerea.     

Hydrogel-based catalysts for hydrogen generation by the hydrolysis of B–H compounds under external physical fields

Hydrogen is a popular clean high-energy-density fuel. However, its utilization is limited by the challenges toward low-cost hydrogen production and safe hydrogen storage. Fortunately, these issues can be addressed using promising hydrogen storage materials such as B–H compounds. Hydrogen stored in B–H compounds can be released by hydrolysis at room temperature, which requires catalysts to increase the rate of the reaction. Recently, several effective approaches have been developed for hydrogen g...     

A comparative study of data-driven battery capacity estimation based on partial charging curves

With its generality and practicality, the combination of partial charging curves and machine learning(ML) for battery capacity estimation has attracted widespread attention. However, a clear classification,fair comparison, and performance rationalization of these methods are lacking, due to the scattered existing studies. To address these issues, we develop 20 capacity estimation methods from three perspectives:charging sequence construction, input forms, and ML models. 22,582 charging curves ar...     

Insights into the enhanced structure stability and electrochemical performance of Ti4+/F- co-doped P2-Na0.67Ni0.33Mn0.67O2 cathodes for sodium ion batteries at high voltage

P2-Na_0.67Ni_0.33Mn_0.67O₂ is considered as a promising cathode material for sodium-ion battery (SIBs)because of its high capacity and discharge potential.However,its practical use is limited by Na⁺/vacancy ordering and P2-O2 phase transition.Herein,a Ti⁴⁺/F^-co-doping strategy is developed to address these issues.The optimal P2-Na_0.67Ni_0.33Mn_0.37Ti_0.3O_1.9F_0.1     

Tuning Structure of Manganese Oxides to Achieve High-performance Aqueous Zn Batteries

As a key material for the development of mild aqueous rechargeable Zn/MnO2 cells, MnO2 has attracted much attention. This article presents some issues of MnO2, provides some strategies improving battery performance of MnO2 electrode, as well as makes a perspective on future research and development of MnO2 materials. This article offers a profound insight on structure/property relationship of MnO2, and benefits a lot to those involved in energy storage and conversion applications.     

Drug discovery based on the structure of FKBP12: Design, synthesis and evaluation of L-1,4-thiazane-3-carboxylic acid derivatives as neuroimmunophilin ligands

By choosing neuroimmunophilin FKBP12 as a therapeutical target, we have attempted to discover a new structural drug for treating neurodegenerative disease. This drug should possess neurotrophic activity and not affect the immune system. Based on the crystal structure of FKBP12, FK506 and Calcineurin complex, a series of small organic molecules were designed. These molecules were to have the ability of binding to FKBP12 in a virtual screening. By using a solution parallel synthetic method, these compounds were synthesized. The neuroprotective and neuroregenerative activities of these compounds were evaluated by binding assays, PC12 cells survival and neurite outgrowth model, chick dorsal root ganglion cultures (DRG) and 6-OHDA lesioned mice sympathetic nerve endings model. The evaluation results of these compounds showed that compound N308 has great promise as a candidate for a neuroprotective and neuroregenerative agent.     

Journal of Energy Chemistry

正www.jenergychem.org AIMS AND SCOPE The Journal of Energy Chemistry is a publication that mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies.     

Catalytic methane removal to mitigate its environmental effect

Large reserve of methane,in the form of natural gas and methane hydrate,has been discovered and it has been intensively used as a fuel,or as a building block for the chemical synthesis.However,severe environmental and climatic issues caused by the leakage of methane during the production,transportation and use of methane are overlooked.This offers incentives for the catalytic removal of methane.Nevertheless,due to the inert nature of methane molecules,the activation of methane via thermocatalysi...     

Charge transfer across the water/nitrobenzene interface by three-electrode system

A droplet of aqueous solution containing a certain molar ratio of redox couple is first attached onto a platinum electrode surface, then the resulting drop electrode is immersed into the organic solution containing very hydrophobic electrolyte. Combined with reference and counter electrodes, a classical three-electrode system has been constructed. Ion transfer (IT) and electron transfer (ET) are investigated systematically using three-electrode voltammetry. Potassium ion transfer and electron transfer between potassium ferricyanide in the aqueous phase and ferrocene in nitrobenzene are observed with potassium ferricyanide/potassium ferrocyanide as the redox couple. Meanwhile, the transfer reactions of lithium, sodium, potassium, proton and ammonium ions are obtained with ferric sulfate/ferrous sulfate as the redox couple. The formal transfer potentials and the standard Gibbs transfer energy of these ions are evaluated and consistent with the results obtained by a four-electrode system and other methods.     

A hierarchical enhanced data-driven battery pack capacity estimation framework for real-world operating conditions with fewer labeled data

Battery pack capacity estimation under real-world operating conditions is important for battery performance optimization and health management, contributing to the reliability and longevity of batterypowered systems. However, complex operating conditions, coupling cell-to-cell inconsistency, and limited labeled data pose great challenges to accurate and robust battery pack capacity estimation. To address these issues, this paper proposes a hierarchical data-driven framework aimed at enhancing th...     

Anode surface engineering of zinc-ion batteries using tellurium nanobelt as a protective layer for enhancing energy storage performance

Over the years, zinc-ion batteries(ZIBs) have attracted attention as a promising next-generation energy storage technology because of their excellent safety, long cycling performance, eco-friendliness, and high-power density. However, issues, such as the corrosion and dissolution of the Zn anode, limited wettability, and lack of sufficient nucleation sites for Zn plating, have limited their practical application. The introduction of a protective layer comprising of tellurium(Te) nanobelts onto t...     

A Review Featuring Fabrication,Properties and Applications of Carbon Nanotubes (CNTs) Reinforced Polymer and Epoxy Nanocomposites

Carbon nanotubes (CNTs) have long been recognized as the stiffest and strongest man-made material known to date.In addition,their high electrical conductivity has roused interest in the areas of electrical appliances and communication related applications.However,due to their miniature size,the excellent properties of these nanostructures can only be exploited if they are homogeneously embedded into light-weight matrices as those offered by a whole series of engineering polymers.In order to enhance their chemical affinity to engineering polymer matrices,chemical modification of the graphitic sidewalls and tips is necessary.The mechanical and electrical properties to date of a whole range of nanocomposites of various carbon nanotube contents are also reviewed in this attempt to facilitate progress in this emerging area.Recently,carbonaceous nano-fillers such as graphene and carbon nanotubes (CNTs) play a promising role due to their better structural and functional properties and broad range of applications in every field.Since CNTs usually form stabilized bundles due to van der Waals interactions,they are extremely difficult to disperse and align in a polymer matrix.The biggest issues in the preparation of CNTs reinforced composites reside in efficient dispersion of CNTs into a polymer matrix,the assessment of the dispersion,and the alignment and control of the CNTs in the matrix.An overview of various CNT functionalization methods is given.In particular,CNT functionalization using click chemistry and the preparation of CNT composites employing hyperbranched polymers are stressed as potential techniques to achieve good CNT dispersion.In addition,discussions on mechanical,thermal,electrical,electrochemical and applications ofpolymer/CNT composites are also included.     

Interfacial design of new generation of dye-sensitized photoelectrochemical cells for water oxidation

正Artificial photosynthesis involves the conversion of solar energy, water, and CO2into chemical fuels and oxygen. One of the most challenging steps is the production of oxygen from water oxidation, as it involves multi-electron and proton transfer processes. Recently, dye-sensitized photoelectrochemical cells (DSPECs) have been widely investigated as the devices to attain the goal of water oxidation. Generally, these devices are comprised of a wide band gap semiconductor, typically TiO2or SnO2, a molecular chromophore as a sensitizer, and a water oxidation catalyst     

Cu2SnSe3/CNTs Composite as a Promising Anode Material for Sodium-ion Batteries

Metal selenides as anode materials for sodium-ion batteries have attracted considerable attention owing to their high theoretical specific capacities and variable composition and structures.However,the achievement of long cycle life and superior rate performance is challenging for these selenide materials due to the volume variation upon cycling.Herein,a composite composed of a new binary-metal selenide[Cu2SnSe3(CSS)]and carbon nanotubes(CNTs)was constructed via a hydrothermal process followed by calcination at 600℃.Benefited from the unique structure of binary-metal selenide and the conductive network of CNTs,the Cu2SnSe3/carbon nanotubes(CSS/CNT)composite exhibits excellent electrochemical performance when used as an anode material for sodium-ion batteries.A reversible specific capacity of 399 mA·h/g can be maintained at a current density of 100 mA/g even after 100 cycles.This work provides a promising strategy for rational design of binary-metal selenides upon delicate crystal phase control as electrode materials.     

Bifunctional fluorescent probes for hydrogen peroxide and diols based on a 1,8-naphthalimide fluorophore

This report discloses a series of naphthalimide-based bifunctional fluorescent probes for hydrogen peroxide and diols.As a result,these molecules not only demonstrated high turn-on fluorescent response and good selectivity towards hydrogen peroxide over other relevant reactive oxygen species,but also displayed different responses to diols.Therefore,these fluorescent probes could be served as sensitive,selective and practical chemosensors for both hydrogen peroxide and diols under physiologicallike conditions.     

Rapidly Estimating Natural Gas Compressibility Factor

Natural gases containing sour components exhibit different gas compressibility factor(Z) behavior than do sweet gases.Therefore,a new accurate method should be developed to account for these differences.Several methods are available today for calculating the Z-factor from an cquation of state. However,these equations are more complex than the foregoing correlations,involving a large number of parameters,which require more complicated and longer computations.The aim of this study is to develop a simplified calculation method for a rapid estimating Z-factor for sour natural gases containing as much as 90% total acid gas.In this article,two new correlations are first presented for calculating the pseudo- critical pressure and temperature of the gas mixture as a function of the gas specific gravity.Then,a simple correlation on the basis of the standard gas compressibility factor chart is introduced for a quick estimation of sweet gases' compressibility factor as a function of reduced pressure and temperature.Finally,a new corrective term related to the mole fractions of carbon dioxide and hydrogen sulfide is developed.