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In this work, the authors report a facile method for the preparation of brush-structured nanocomposites of sulfur–polyaniline–graphene oxide (S–PANI–G) that were used for cathode materials of lithium–sulfur batteries (LSBs). The morphology and structure of composite were studied by x-ray photoelectron microscopy, transmission electron microscopy, scanning electron microscopy, and x-ray diffraction analysis. The nanocomposites exhibited good electrochemical performance involving good rate performance, high capacity, and promising cycling stability. The good performance of S–PANI–G results from the synergistic effect of sulfur, polyaniline, and graphene oxide. The composite and method reported here pave the way for the design and synthesis of novel cathode materials for LSBs.
Herein, the authors report our pioneering demonstration of the anisotropic thermal properties of black phosphorus (BP) nanoflakes. The nanoflakes were produced using a scotch tape-based mechanical exfoliation technique. Their thickness was characterized using Atomic Force Microscopy The anisotropic direction of the nanoflakes was determined by the Raman Spectroscopy equipped with a polarized laser. Then, a temperature-dependent Raman spectroscopy method was utilized to study the thermal transport properties of the BP nanoflakes. The results indicated that the thermal conductivities of zigzag BP and armchair nanoflakes are 30.6 and 12.6 W/m·K, respectively. This fundamental thermal study gives insight into the future fabrication of nanoscale electronic devices with thermal properties that can be well controlled.
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