An Li_1.3Al_0.3Sn_xTi_1.7−x(PO₄)₃ (LATP-xSn) ceramic solid electrolyte was prepared by Sn doping via a solid phase method. The results showed that adding an Sn dopant with a larger ionic radius in a concentration of x = 0.35 enabled one to equivalently substitute Ti sites in the LATP crystal structure to the maximum extent. The uniform Sn doping could produce a stable LATP structure with small grain size and improved relative density. The lattice distortion induced by Sn doping also modified the transport channels of Li ions, which promoted the increase of ionic conductivity from 5.05 × 10⁻⁵ to 4.71 × 10⁻⁴ S/cm at room temperature. The SPE/LATP-0.35Sn/SPE composite solid electrolyte with a sandwich structure was prepared by coating, which had a high ionic conductivity of 5.9 × 10⁻⁵ S/cm at room temperature, a wide electrochemical window of 4.66 V vs. Li/Li⁺, and a good lithium-ion migration number of 0.38. The Li||Li symmetric battery test results revealed that the composite solid electrolyte could stably perform for 500 h at 60 °C under the current density of 0.2 mA/cm², indicating its good interface stability with metallic lithium. Moreover, the analysis of the all-solid-state LiFePO₄||SPE/LATP-0.35Sn/SPE||Li battery showed that the composite solid electrolyte had good cycling stability and rate performance. Under the conditions of 60 °C and 0.2 C, stable accumulation up to 200 cycles was achieved at a capacity retention ratio of 90.5% and a coulombic efficiency of about 100% after cycling test.

In view of the increasingly serious harm of CO₂ to the environment, it is highly desirable to develop effective CO₂ absorbents. In this work, we demonstrated an efficient absorption of CO₂ by blends of protic ionic liquids (PILs) plus amines. The density and viscosity of investigative four PILs-amine mixtures were measured. By systematically studying the effects of the solution ratio, temperature, CO₂ partial pressure, and water content on the absorption of CO₂, it is found that the 3-dimethylamino-1-propylamine acetate ([DMAPAH][OAc]) plus ethanediamine (EDA) mixture shows the highest CO₂ uptake of 0.295 g CO₂ per g absorbent at 50 °C and 1 bar and a further increase in the absorption of CO₂ to 0.299 g/g by adding water with a mass fraction of 20%. Furthermore, the absorption mechanism of CO₂ in the presence and absence of water has also been investigated by FTIR and NMR spectra.

Mechanochemistry is very attractive as an efficient, solvent-free, and simplified technique for the preparation of composite adsorbents. Here, a series of polyethyleneimine (PEI)-modified SiO₂ adsorbents were prepared via mechanical ball milling for selective adsorption of CO₂ at high temperatures. The structural properties of these adsorbents were characterized by XRD, SEM, TGA, FTIR, and N₂ adsorption–desorption. This method can better disperse the PEI evenly in the SiO₂ as well as maintain the porous structure of the adsorbents by comparing with the impregnated adsorbents. These adsorbents presented appreciable performance in separating CO₂ at high temperatures, and the CO₂ adsorption capacity of PEI(70%)/SiO₂ is up to 2.47 mmol/g at 70 °C and 1.5 bar, which is significantly higher than that of the same type of CO₂ adsorbent reported in the literature. Furthermore, the adsorbent of PEI(70%)/SiO₂ provided an ideally infinite selectivity for CO₂/N₂ (15:85) at 70 °C. These results showed that mechanical grinding methods are a simple and effective approach to producing amine-modified silica composite adsorbents.

Despite their promising application prospects in electromagnetic interference (EMI) shielding, a significant challenge remains in endowing flexible porous polymer-based conductive composites with exceptional thermal management capabilities. In this study, PDMS/GNPs foam serves as a three-dimensional (3D) porous skeleton, with LM nanoparticles anchored on its surface, creating a poly(dimethylsiloxane)/graphene nanoplatelets@liquid metal (PDMS/GNPs@LM) composite foam with a dual network structure, achieved through a simplified salt template and extrusion impregnation method. Owing to the successful construction of this dual 3D network structure, when the filler loading is 22.34 vol%, PDMS/GNPs@LM foam exhibits an excellent thermal conductivity of 0.74 W m⁻¹ K⁻¹, representing a 1133% enhancement compared to the neat PDMS foam. Finite element simulations demonstrate that the LM layer network exhibits excellent heat transmission due to the effective adhesion of adjacent LM nanoparticles via the polyvinyl alcohol adhesives, with heat flux mainly transferred through the continuous LM framework. The PDMS/GNPs@LM foam possesses an outstanding electrical conductivity of 35.15 S m⁻¹ and excellent EMI shielding effectiveness of 40.8 dB (with a thickness of only 2.13 mm). Furthermore, the PDMS/GNPs@LM foams demonstrate good mechanical flexibility and exhibit rapid electrothermal response and hydrophobicity. Based on these merits, the PDMS/GNPs@LM foam is anticipated to find applications in electronics, particularly in intelligent electromagnetic protection and thermal management systems.

Rational tailoring of the atomic structure of photocatalysts with multiple functions to enhance the carrier transfer efficiency and surface activation of carbon nitride (C ₃ N ₄ ) is promising and a challenge.