Honeycuttvaldez0743

Despite the fact that solid-state electrolytes have attracted broad research interests, the limited ion transfer and high interface impedance restrain their application in high-performance batteries with high cyclic stability and power density. Here, a new quasi-solid-state polymer electrolyte containing lightweight semiconducting hydrogenated borophene (HB) nanosheets, ionic liquids, and poly (ethylene oxide) is reported. The cyclic overpotential of the Li-Li symmetrical battery is about 65 mV lower than that of HB-free quasi-solid-state electrolyte, demonstrating the lower interface impedance. The interaction between lithium-ion and ethylene-oxide chains decreases owing to the existence of HB nanosheets and ionic liquids, which facilitates lithium-ion diffusion. The lithium bis(trifluoromethanesulfonyl)imide molecule surface adsorption at the HB nanosheets enhances the dissociation of lithium ions, and thus the matched lithium iron phosphate/Li full cell delivers the acceptable rate performance up to 5C. This work provides a new filler candidate to enhance the ionic conductivity of quasi-solid-state electrolytes that may facilitate to construct the high-performance HB nanosheets and ionic liquids-based lithium metal batteries.Engineering of electromagnetic wave absorbing materials featuring long-term durability in harsh outdoor environments (e.g., humidity, acid, and alkali conditions) is meaningful for their effective and sustainable implementation. Herein, morphology-controlled erbium oxide-reduced graphene oxide composites are designed for effective absorption of electromagnetic microwaves either in an acidic or alkaline environment. The engineered nanocomposites with chrysanthemum-like structures display good impedance matching, moderate attenuation constant, exchange resonance, natural resonance, multiple reflections, and polarization relaxations, therefore exhibiting excellent microwave absorption capacity with a minimum reflection loss of -37.18 dB and an effective absorption bandwidth of 5.1 GHz. In addition, the chrysanthemum-like composite also displays self-cleaning property, strong weatherability, and acid- and alkali-resistance, enabling sustained electromagnetic wave absorbing performance even in corrosive conditions (1 M HCl, 1 M NaOH). The findings indicate that, through structural engineering, erbium oxide-reduced graphene oxide composites can serve as a promising microwave absorber in harsh outdoor environments.Harvesting energy from water motion is attractive and is considered as a promising component in a microgenerator system for decentralized energy. Recent developments have been shown to rely on spontaneous electrification at the solid-liquid interface, even though the precise mechanism is still under debate. In this paper, we report that the triple-phase boundary of solid/liquid/air can be quantitatively charged by tuning the work function by modifying a self-assembled monolayer (SAM), where a permanent or redox-active dipole controls the polarity and degree of electrification, and by modulating the electrochemical potential of the solution used. With the simple system proposed here, electricity is successfully delivered to turn on a light-emitting diode (LED), demonstrating the potential applicability of the system for energy harvesters.Multimodal therapy has attracted increasing interests in tumor treatment due to its high anti-cancer efficacy, and the key is to develop multifunctional nanoagents. The classic multifunctional nanoagents are made up of expensive and complex components, leading to limited practical applications. To solve these problems, we have developed the polyethylene glycol (PEG) coated hollow Cu9S8 nanoparticles (H-Cu9S8/PEG NPs), whose H-Cu9S8 component exhibits the photothermal effect for near-infrared (NIR) photothermal therapy (PTT), the Fenton-like catalytic activity for chemodynamic therapy (CDT), and the drug-loading capacity for chemotherapy. The H-Cu9S8/PEG NPs with a diameter of ∼ 100 nm have been synthesized by sulfurizing cuprous oxide (Cu2O) nanoparticles through "Kirkendall effect", and they exhibit high photothermal conversion efficiency of 40.9%. Meanwhile, the H-Cu9S8/PEG NPs are capable of a Fenton-like reaction, which can be augmented by 2 times under the NIR irradiation. The hollow structure gives the H-Cu9S8/PEG high doxorubicin (DOX) loading capacity (21.1%), and then the DOX release can be further improved by pH and photothermal effect. When the DOX@H-Cu9S8/PEG dispersions are injected into the tumor-bearing mice, the tumor growth can be efficiently inhibited due to the synergistic effect of photothermally-augmented CDT-chemo therapy. Therefore, the DOX@H-Cu9S8/PEG can serve as a multifunctional nanoplatform for photothermally-augmented CDT-chemo treatment of malignant tumors.At present, rechargeable aqueous zinc ion batteries (RZIBs) have become a rising star and highly sought after in the field of new energy. While vanadium-based RZIBs often exhibit an anomaly of increased long-cycle capacity, which has not been explored in depth. Nevertheless, it is critical to understand this phenomenon to develop high-performance RZIBs. Therefore, this study investigated the growth mechanism of VSe2-based RZIBs using VSe2/MXene as the cathode material via in-situ and ex-situ characterization techniques and electrochemical measurements. Experimental results indicated that with the interaction/extraction of Zn2+/H+ in the host material during cycling, an obvious oxidation reaction occurs at high voltage, and the formed vanadium oxide further reacts with Zn2+ from the electrolyte. As a result, Zn0.25V2O5·H2O is continuously produced and accumulated, contributing to the increasing capacity of the prepared RZIBs.Aqueous zinc-ion batteries (ZIBs) are receiving a continuously increasing attention for the flexible and wearable electronics, due to their non-toxicity, non-flammability, and low-cost features. The development of high-performance flexible cathodes is of great significance to the development of flexible ZIBs. In this work, the flexible electrode of three-dimensional (3D) interconnected ultrathin MnO2 nanosheets on carbon cloth (CC@MnO2) coated with Ti3C2Tx MXene (CC@MnO2@MXene) is prepared by electrodeposition and dipping methods, in which CC@MnO2 is put into MXene dispersion for impregnation treatment to make the CC@MnO2 fibers wrapped with MXene completely. The results show that the coating of MXene improves the conductivity of the composite, and the interface between MXene and MnO2 provides more active sites. Therefore, CC@MnO2@MXene-10 electrode as the cathode of zinc ion battery provides high charge storage performance (517.0 mAh g-1 at 0.1 A g-1), excellent cycling stability (80.6 mAh g-1 after 800 cycles at 1 A g-1) and excellent energy density (701.3 Wh kg-1 at 133.8 W kg-1). Finally, flexible quasi-solid battery based on CC@MnO2@MXene composite as cathode was assembled, and the flexible electrodes show potential for application.Nowadays fast charging has become an important characteristic of lithium-ion batteries (LIBs), so is of great significance to study the fast charging of LIBs. However, previous research of fast charging has focused more on high energy density LIBs, due to the growing demand for electric vehicles. Herein, the fast-charging properties under ambient temperature and high temperature for (60 mAh LiCoO2/graphite batteries) micro-LIBs are firstly investigated. The electrochemical test results reveal that this kind of battery possesses 4C fast-charging capability. Further increase in charging rate will accelerate battery capacity decay without reducing charging time. GW806742X research buy Although high temperature increases the fast-charging capacity and shortens the fast-charging time to 10 min at 6C under 65 °C, increase of side reactions resulted from high temperature also exacerbates the performance of battery. Post-mortem analysis further demonstrates the structural changes of cathode and anode materials, residual lithium deposits, peeling of graphite and the incrassation of the solid electrolyte interphase (SEI), especially under high temperature, which lead to fast -charging performance degradation. This work reveals the possible causes of micro battery performance deterioration during fast charging under ambient and high temperature and provides some reference for designing micro-LIBs with fast -charging properties.Developing novel electrode materials with reasonable structures and ideal conductivity is of great significance for energy storage devices. In this work, Ni3Se2@C yolk-shell nanorods are grown on nickel foam (NF) via a one-step selenization and carbonization process. The carbon shell not only improves the conductivity and charge transfer of electrodes, but also inhibits the dissociation of Ni3Se2 core during redox reactions, which is crucial to electrochemical performances of SCs. Owing to the yolk-shell nanorod structure, the Ni3Se2@C electrode exhibits an outstanding specific capacitance of 1669.7F g-1 at 1 A g-1. Moreover, an asymmetric supercapacitor (ASC) is successfully assembled using Ni3Se2@C and active carbon (AC) electrodes as the anode and cathode respectively, which delivers remarkable energy-storage characteristics. Specifically, the Ni3Se2@C//AC ASC shows a high energy density (31.0 Wh kg-1) at a power density (723.7 W kg-1), and stable cycling performance (97% capacitance retention after 9000 cycles). These results make the Ni3Se2@C a promising electrode for SCs.This study is the first to apply a zero-valent iron (ZVI) system in the treatment of cottonseed oil (CTO) refining wastewater. The results indicated that the ZVI system can effectively degrade and mineralize CTO in the wastewater, whereas sunlight irradiation and O2 bubbling can considerably enhance CTO degradation, removing 93.5% of CTO and 69.0% of chemical oxygen demand within 180 min. In addition, a low concentration (0.1 mM) of SO42- and Cl- in the wastewater improved CTO degradation, whereas a high concentration (>1 mM) of these anions considerably inhibited the degradation process. However, NO3- at all concentrations hindered CTO degradation. Furthermore, OH and O2- were the main active species for CTO degradation in the ZVI system under dark conditions. However, in addition to these two species, photogenerated hole (h+) played a key role in CTO degradation under sunlight irradiation. This observation might be derived from the photocatalytic effect due to photoexcitation of the iron corrosion product, γ-FeOOH. Our findings show that the ZVI system assisted by sunlight irradiation and O2 bubbling is feasible for CTO-refining wastewater treatment and can guide the real wastewater treatment project.In this study, a layered ammonium vanadate (NH4V4O10) nanobelt adsorbent was synthesized by a facile hydrothermal method to remove Sr2+ and Cs+ from contaminated water. The NH4V4O10 nanobelt was texturally and morphologically characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman, thermogravimetric differential thermal analyzer (TG-DSC), Brunauer- Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS) both before and after adsorbing Sr2+ and Cs+. The results showed that the NH4V4O10 nanobelt exhibited the optimal morphological structure with a 21 ratio of NH4VO3dipropylamine. In the lattice of the adsorbent, the horizontal distance between oxygen atoms was 0.55 nm, the vertical distance between vanadium was 0.35 nm, and the layer distance of the adsorbent was 0.931 nm. The structure characterization indicated the VO6 octahedron formed a basic framework through sharing connected vertices.