Giant Thermoelectric Efficiency of Single-Filled Skutterudite Nanocomposites: Role of Interface Carrier Filtering.

The advantage of secondary-phase induced carrier filtering on the thermoelectric properties has paved the way for developing cost-effective, highly efficient thermoelectric materials. Here, we report a very high thermoelectric figure-of-merit of skutterudite nanocomposites achieved by tailoring interface carrier filtering. The single-filled skutterudite nanocomposites are prepared by dispersing rare-earth oxides nanoparticles (YbO, SmO, LaO) in the skutterudite (DyCoNiSb) matrix.

Magnetic and optical properties of green synthesized nickel ferrite nanoparticles and its application into photocatalysis.

Spinel NiFeOnanoparticles have been synthesized via hydrothermal route usingflower extract (MIFE) as a green surfactant and reducing agent. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques have been used to determine the structure and morphology. The formation of single-phase, monodispersed NiFeOwith mixed morphology, the predominant shape being of equi-axed nanoparticles having an average particle size ≲45 nm, is observed.

Effect of Refractory Tantalum Metal Filling on the Microstructure and Thermoelectric Properties of CoSb Skutterudites.

We report a systematic investigation of the microstructure and thermoelectric properties of refractory element-filled nanostructured CoSb skutterudites. The refractory tantalum (Ta) metal-filled CoSb samples (Ta CoSb ( = 0, 0.4, 0.

Concentration Gradient-Driven Aluminum Diffusion in a Single-Step Coprecipitation of a Compositionally Graded Precursor for LiNiCoAlO with Mitigated Irreversibility of H2 ↔ H3 Phase Transition.

LiNiCoAlO (NCA) possessing a nano-/micro hierarchical architecture delivers a high specific capacity of 200 mAh/g with an upper cutoff voltage of 4.4 V. However, the structural reconstruction due to the irreversibility of the H2 ↔ H3 phase transition at higher voltage increases the initial irreversible capacity loss and charge-transfer impedance and reduces the performance at higher C-rates.

Efficient reduced graphene oxide grafted porous Fe3O4 composite as a high performance anode material for Li-ion batteries.

Here, we report facile fabrication of Fe3O4-reduced graphene oxide (Fe3O4-RGO) composite by a novel approach, i.e., microwave assisted combustion synthesis of porous Fe3O4 particles followed by decoration of Fe3O4 by RGO.