Southwest University for Nationalities

Sodium vanadium fluorophosphate is a sodium ion superconductor material with high sodium ion mobility and excellent cyclic stability, making it a promising cathode material for sodium-ion batteries. However, most of the literature and patents report preparation through traditional methods, which involve complex processes, large particle sizes, and low electronic conductivity, thereby limiting development progress.

Aiming at the limitation of high cost and poor performance of vanadium sodium fluorophosphate cathode material, the low temperature and high-efficiency nano preparation technology was developed.

This study uses a homogenizer with high dispersion and shear force to directionally control the collision of sodium vanadium fluorophosphate nanoparticles with higher specific surface energy during the initial nucleation stage, forming nanosheet structures.

The growth mechanism of these nanosheets was analyzed using SEM, XRD, AFM, and DFT simulation. Results indicate that the crystal surfaces with higher surface energy undergo directional collisions in the early nucleation stage, gradually reducing the surface energy and stabilizing the system, resulting in sodium vanadium fluorophosphate nanosheets.

Due to the larger specific surface area and pore structure, these nanosheets exhibit excellent rate performance and cycle stability, making them suitable for application and promotion in the field of fast-charging energy storage.

Yttrium oxide–magnesium oxide (Y2O3–MgO) composite nanopowders were synthesized via three distinct methods: sol–gel, co-precipitation and glycine–nitrate process. The synthesized powders were calcined at various temperatures, and their microstructure, specific surface area and particle size were characterized. A comparative study was conducted to assess the impact of the synthesis method on the microstructure and transparency of the resulting ceramic sintering. Notably, the powder synthesized by the sol–gel technique exhibited the highest specific surface area and superior light transmittance, reaching a maximum of 85.33% at a wavelength of 5.31[Formula: see text]m.

As a key tool for addressing environmental pollution and fostering a green economy, voluntary environmental regulation has a profound impact on the distribution of factor income. To increase labor income share and alleviate conflicts between labor and capital, this study offers new theoretical insights and solutions from the perspective of voluntary environmental programs. Specifically, it treats ISO14001 environmental standard certification as a quasi-natural experiment to examine the causal relationship between voluntary environmental programs and corporate labor income share and derives the following conclusions. The baseline regression results indicate that voluntary environmental programs significantly increase the labor income share of corporations. Mechanism analysis reveals that reducing financial constraints, optimizing human capital structure, and weakening market monopoly power are crucial pathways through which voluntary environmental programs enhance labor income share. Heterogeneity tests show that the positive impact of voluntary environmental programs on labor income share is more pronounced in non-state-owned enterprises, highly polluting enterprises, enterprises in regions with stronger environmental governance, and those in more market-oriented industries. Further research indicates that voluntary environmental programs significantly improve the compensation of regular employees and narrow internal income disparities within corporations, thus accelerating the achievement of the strategic goal of common prosperity.