A double transition metal Ti2NbC2Tx MXene for enhanced lithium-ion storage

Superior lithium-ion storage performance of hierarchical tin disulfide and carbon nanotube-carbon cloth composites

ZnS materials have been widely used in fluorescence biosensors to characterize different types of stem cells due to their excellent fluorescence effect. In this study, ZnS was prepared by vulcanizing nano-Zn particles synthesized using a DC arc plasma. The composition and structure of the ZnS materials were studied by X-ray diffraction (XRD), and their functional group information and optical properties were investigated by using IR spectrophotometry and UV-vis spectrophotometry. It has been found that the synthesized materials consist of Zn, cubic ZnS, and hexagonal ZnS according to the vulcanization parameters. Crystalline ZnS was gradually transformed from a cubic to a hexagonal structure, and the cycling properties first increase, then decrease with increasing sulfurization temperature. There is an optimal curing temperature giving the best cycling performance and specific capacity: the material sulfurized thereat mainly consists of cubic β-ZnS phase with a small quantity of Zn and hexagonal α-ZnS. The cubic phase ZnS has better conductivity than hexagonal ZnS, as evinced by electrochemical impedance spectroscopy (EIS). The ZnS (as prepared) shows board absorption, which can be used in fluorescence biosensors in cell imaging systems.

/pdf/study-of-the-structure-and-properties-of-zns-utilized-in-a-42704vqqnp.pdf

Study of the Structure and Properties of ZnS Utilized in a Fluorescence Biosensor.

Due to the high theoretical specific capacity, abundant resources, easy availability, and environmental amicability, zinc oxide (ZnO) has been regarded as a promising alternative for lithium-ion battery anode. However, the further application of ZnO anode is still faced with great challenges such as huge volume transformation and intrinsic low conductivity. Herein, we propose a simple strategy for the preparation of ZnO/carbon clusters (∼50 nm) which are assembled with uniformly distributed ZnO nanodots (∼5 nm) in the three-dimensional carbon nanofibers (ZnO/CNFs) through an electrospinning and subsequent carbonization process using gallic acid-zinc coordination polymer (GAZ) as precursor. The multi-dimensional assembly of ZnO nanodots and reticular formation of conductive carbon network can effectively alleviate the volume change of ZnO anode during long-term cycling process and promote the fast transfer of electrolyte ions/electrons, greatly improving the rate and cycle performance. As a result, the ZnO/CNFs electrode exhibits excellent rate performance of 375.3 mAh g−1 at 2 A g−1 and long cycling stability with capacity retention of 92% over 600 cycles at 1 A g−1. These features indicate that the systematic combination of electrospinning and metal-organic coordination polymers have significant promise for the construction of high-performance metal derivative anodes. 

Multi-dimensional assembly of ZnO nanodots in the reticular carbon nanofibers for high-performance lithium-ion batteries

/pdf/electrochemical-behavior-of-mwcnt-constraint-sns-2-3tbu6u0e0p.pdf

Electrochemical Behavior of MWCNT-Constraint SnS 2 Nanostructure as the Anode for Lithium-Ion Batteries

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Electrochemical Behavior of MWCNT-Constraint SnS 2 Nanostructure as the Anode for Lithium-Ion Batteries