The composite of tungsten-doped SnO and reduced graphene oxide was synthesized through a simple one-pot hydrothermal method. According to the structural characterization of the composite, tungsten ions were doped in the unit cells of tin dioxide rather than simply attaching to the surface. Tungsten-doped SnO was in situ grown on the surface of graphene sheet to form a three-dimensional conductive network that enhanced the electron transportation and lithium-ion diffusion effectively. The issues of SnO agglomeration and volume expansion could be also avoided because the tungsten-doped SnO nanoparticles were homogeneously distributed on a graphene sheet. As a result, the nanocomposite electrodes of tungsten-doped SnO and reduced graphene oxide exhibited an excellent long-term cycling performance. The residual capacity was still as high as 1100 mA h g at 0.1 A g after 100 cycles. It still remained at 776 mA h g after 2000 cycles at the current density of 1A g.

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Transmittance and haze are key properties of light diffusion materials. Hybrid light diffusion agents (LDAs) and meltblending process are introduced to study optical performance and mechanical properties of polycarbonate (PC) light diffusion materials. Optical properties of PC composites prepared by two-step melt-blending process has better repeatability compared to one-step method due to the better dispersion state of hybrid fillers in PC matrix. The hybrid fillers silicate microspheres (SMS)/nano titania particles (nTiO 2 ) are more suitable for PC matrix compared to crosslinked poly(methyl methacrylate) microspheres (PMMA)/nTiO 2 , for the reason that the PC/SMS/nTiO 2 composites exhibit favorable optical performance and almost no deterioration of mechanical properties. The good balance between high transmittance and substantial haze can be achieved when the SMS/nTiO 2 content is 1.2 wt% (the transmittance and haze are 60.97% and 88.73%, respectively). POLYM. ENG. SCI., 57:374-380, 2017.

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