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Fe3O4 and Fe3O4/NiO heterostructures were successfully prepared by a simple one-step solvothermal method. The morphology of Fe3O4/NiO heterostructures is flower-like spheres composed of nanosheets with a thickness of 10–20 nm. As anode material for lithium-ion batteries (LIBs), the electrochemical performance of the Fe3O4 and Fe3O4/NiO heterostructures are comparatively investigated. At current density of 100 mA g−1, the Fe3O4/NiO heterostructures can maintain 1021 mAh g−1 after 100 cycles. The discharge capacity can still maintain at 500 mAh g−1 and the coulomb efficiency is always stable at 99.6% after 1000 cycles at 1 A g−1. The Fe3O4/NiO heterostructures also have lower impedance and better rate capability, compared with the bare Fe3O4 electrode. Moreover, the electrochemical properties of the Fe3O4/NiO heterostructures can be further improved when the new binder CMC-Li is used. At 100 mA g−1, it can still maintain 1544 mAh g−1 after 100 cycles. These loose-layered nanosheets can effectively alleviate the volume expansion of materials in the process of charge and discharge. Meanwhile, the large surface area can provide more reaction sites. The ultra-thin nanosheet can also reduce the diffusion distance of lithium ions, so that the Fe3O4/NiO heterostructures have excellent performance in lithium-ion batteries. [ABSTRACT FROM AUTHOR]

FeS2/CoS and FeS2/CoS/C composites were synthesized by solvothermal method and following vapor phase vulcanization at mild temperature with binary oxide CoFe2O4 as precursors. All FeS2/CoS composites prepared at different molar ratios of Fe3+ and Co2+ ions exhibit the similar morphology of solid microspheres. As anode materials for lithium-ion batteries (LIBs), the as-prepared FeS2/CoS and FeS2/CoS/C composites show higher reversible capacity and better cycling performance, compared with the bare FeS2 and CoS. Among them, the FeS2/CoS composite with molar ratio of Fe3+ and Co2+ of 2:1 exhibits the high reversible capacity of 1150 mAh g−1 after 100 cycles at 100 mA g−1 and even 610 mAh g−1 at 1.0 A g−1 after 900 cycles. This strategy for synthesizing the heterogeneous structure of binary sulfide can effectively improve the kinetic which thus enhance the electrochemical performance of materials. This work can provide an effective method and idea for the preparation and modification of FeS2 and other transition metal sulfide anode materials for LIBs in the future. [ABSTRACT FROM AUTHOR]

Aims: Sepsis-associated encephalopathy (SAE) is a common but serious complication in septic survivors and often causes long-term cognitive impairments. The role of RIPK3-participated necroptosis in SAE remains obscured. STING is a key molecule in regulating necroptosis and apoptosis. However, there is uncertainty as to the mechanisms of STING in CLP-induced SAE. The aim of this study was to investigate whether STING is involved in the underlying mechanism of SAE. Methods: The contextual fear conditioning test (CFCT) assesses cognitive impairment. A transmission electron microscope (TEM) was used to notice the necroptosis. Western blotting and immunofluorescence labeling were applied for the observation of related proteins. Results: The phosphorylated STING in the hippocampal neuron of SAE mice was significantly elevated. Knocking down STING inhibited necroptosis and attenuated cognitive impairment in SAE mice. Moreover, RIPK3−/− mice had less cognitive deficit in the SAE model. However, STING overexpression did not deteriorate cognitive impairment in RIPK3−/− mice with SAE, indicating that STING is upstream involved in necroptosis. Furthermore, PERK inhibition ameliorated cognitive deficits through a STING-dependent pathway in SAE mice. Conclusion: PERK-STING-RIPK3 pathway facilitates cognitive impairment by inducing neuronal necroptosis in the pathology of SAE, which provided a new therapeutic target in SAE treatment. [ABSTRACT FROM AUTHOR]

MoSe2/carbon nanotubes (CNTs) composite was synthesized by a hydrothermal method and followed by annealing in Ar gas using Na2MoO4·2H2O, CN2H4Se, and NH2OH·HCl as reactants in the presence of CNTs. The products were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The results show that the introduction of CNTs plays a crucial role in the morphology and electrochemical performance as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The MoSe2/CNT electrode exhibits a high reversible capacity of 1140 mAh g−1 and 1014 mAh g−1 at the current density of 100 mA g−1 for LIBs and SIBs, respectively. The MoSe2/CNT electrode exhibits higher capacity, better cycling stability compared with the bare MoSe2. The MoSe2 and MoSe2/CNT composite behave good electrochemical properties may be due to their flower-like nanosheets, well-stacked layers, and 3D CNTs networks. The results suggest that the MoSe2/CNT composite could be a promising anode material for LIB and SIB applications. Moreover, our present work provides a new approach for the fabrication of well-crystalline MoSe2 material and further applications in lithium/sodium storage. [ABSTRACT FROM AUTHOR]

Abstract Cobalt-doped tungsten disulfide nanorods were synthesized by an approach involving exfoliation, intercalation, and the hydrothermal process, using commercial WS2 powder as the precursor and n-butyllithium as the exfoliating reagent. XRD results indicate that the crystal phase of the sample is 2H-WS2. TEM images show that the sample consists of bamboo-like nanorods with a diameter of around 20 nm and a length of about 200 nm. The Co-doped WS2 nanorods exhibit the reversible capacity of 568 mAh g−1 in a voltage range of 0.01–3.0 V versus Li/Li+. As an electrode material for the lithium battery, the Co-doped WS2 nanorods show enhanced charge capacity and cycling stability compared with the raw WS2 powder.