Surface Oxygen Vacancy Inducing Li-Ion-Conducting Percolation Network in Composite Solid Electrolytes for All-Solid-State Lithium-Metal Batteries.

Composite solid electrolytes (CSEs) are newly emerging components for all-solid-state Li-metal batteries owing to their excellent processability and compatibility with the electrodes. Moreover, the ionic conductivity of the CSEs is one order of magnitude higher than the solid polymer electrolytes (SPEs) by incorporation of inorganic fillers into SPEs. However, their advancement has come to a standstill owing to unclear Li-ion conduction mechanism and pathway.

Ionic Liquid Electrolytes for Electrochemical Energy Storage Devices.

For decades, improvements in electrolytes and electrodes have driven the development of electrochemical energy storage devices. Generally, electrodes and electrolytes should not be developed separately due to the importance of the interaction at their interface. The energy storage ability and safety of energy storage devices are in fact determined by the arrangement of ions and electrons between the electrode and the electrolyte.

Facile Liquid-Exfoliation Process of Boron Nitride Nanosheets for Thermal Conductive Polyphthalamide Composite.

In this study, we describe the fabrication of thermally conductive composites based on a polyphthalamide (PPA) matrix by the exfoliation of hexagonal BN nanosheets (BNNs) via the melt-mixing method. Boron nitride (BN) particles were hydroxyl groups surface-treated with sodium hydroxide (NaOH). Compared with existing BN peeling experiments, we successfully produced BNNs that are simpler, more economical, and have an excellent aspect ratio.

MnCoO nanoparticles supported on nitrogen and sulfur co-doped mesoporous carbon spheres as efficient electrocatalysts for oxygen catalytic reactions.

The development of efficient bifunctional electrocatalysts for the oxygen reduction and oxygen evolution reactions is essential to address the challenge of sluggish reaction kinetics. MnCo2O4 nanoparticles supported on nitrogen and sulfur co-doped mesoporous carbon spheres are prepared as non-precious metal electrocatalysts by pyrolysis of thiourea and hydrothermal treatment. The co-doping of nitrogen and sulfur from thiourea into the carbon spheres plays an important role in bimetallic covalent coupling with manganese and cobalt oxides.

Fabrication of Water Soluble Polymer Capsules for Protecting Mineral Admixtures in Groundwater for Emergency Recovery of Sinkhole.

Polyethylene glycol (PEG) based water-soluble polymer composites were fabricated for mineral admixture encapsulants to be used in underground sinkhole restoration. Linear low-density polyethylene (LLDPE) and talc were added to the composites to increase their mechanical strengths and heat resistances. PEG/LLDPE/Talc composites were manufactured via melt mixing using a twin extruder.

Surface modification of a BN/ETDS composite with aniline trimer for high thermal conductivity and excellent mechanical properties.

Boron nitride (BN) particles surface-treated with different amounts of aniline trimer (AT) were used to prepare thermally conductive polymer composites with epoxy-terminated dimethylsiloxane (ETDS). For the same weight content of BN, the BN composites surface-treated with AT showed better mechanical strength and thermal conductivity than the pure BN composites. This is because of the intercalation of AT between BN and ETDS, which not only increased the wettability but also provided excellent heat transfer pathways.

Laser direct structuring and electroless plating applicable super-engineering plastic PPS based thermal conductive composite with particle surface modification.

Boron nitride (BN) and laser activate particles (LAPs) were surface-modified base treatment and by using a silane coupling agent in order to confer functionality and enhance the interfacial affinity of these particles for a polymer matrix. The introduction of LAP and BN caused severe deterioration of the mechanical properties of the filler-polymer composite by acting as defects and due to the poor interface with polyphenylene sulfide (PPS), used as the polymeric matrix. As expected, the thermal and mechanical properties were enhanced surface modification, whereas the tensile strength of the composites with the surface-modified fillers remained lower than that of neat PPS.