Antimony-based materials have been considered as highly competitive anodes for sodium-ion batteries (SIBs) because of their high theoretical capacity. However, the poor rate capability and fast capacity fading originated from...

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Based on empirical mode decomposition (EMD), the background removal and de-noising procedures of the data taken by polarization interference imaging interferometer (PIIS) are implemented. Through numerical simulation, it is discovered that the data processing methods are effective. The assumption that the noise mostly exists in the first intrinsic mode function is verified, and the parameters in the EMD thresholding de-noising methods is determined. In comparison, the wavelet and windowed Fourier transform based thresholding de-noising methods are introduced. The de-noised results are evaluated by the SNR, spectral resolution and peak value of the de-noised spectrums. All the methods are used to suppress the effect from the Gaussian and Poisson noise. The de-noising efficiency is higher for the spectrum contaminated by Gaussian noise. The interferogram obtained by the PIIS is processed by the proposed methods. Both the interferogram without background and noise free spectrum are obtained effectively. The adaptive and robust EMD based methods are effective to the background removal and de-noising in PIIS.

TGG crystal can be used to fabricate various magneto-optical devices, due to its optimum Faraday Effect. In this work, 400-keV He+ ions with a fluence of 6.0 × 1016 ions/cm2 were irradiated into the TGG crystal for the planar waveguide formation. The precise diamond blade dicing with the rotation speed of 20,000 rpm and the cutting velocity of 0.1 mm/s was performed on the He+-implanted TGG planar waveguide for the ridge structure. The dark-mode spectrum of the He+-implanted TGG planar waveguide was measured by the prism-coupling method, obtaining the relationship between the reflected light intensity and the effective refractive index. The refractive index profile of the planar waveguide was reconstructed by the reflectivity calculation method. The near-field light intensity distributions of the planar and ridge waveguides were recorded by the end-face coupling method. The He+-implanted and diamond blade-diced TGG crystal planar and ridge waveguides are promising candidates for integrated magneto-optical devices.

Chromotrope 2R (CR) is a monoazo dye, which can be easily degraded under ultraviolet C (UVC) light irradiation. However, the degradation extent of CR is suppressed after it is chelated with Cu2+ ions to form a coordination complex (Cu2+–CR).

As the most competitive candidate to lithium-ion batteries, potassium-ion batteries (PIBs) have gained widespread attention for next-generation power storage devices owing to their superior performance and economical price. However, the electrode materials of PIBs have been suffering from a huge volume expansion caused by the large radius of K + during potassiation/depotassiation, which leads to poor cyclic stability and rate capability. Herein, FeS 2 nanoparticles anchored on the inner wall of N/S-doped hollow carbon spheres (FeS 2 @HCS) have been elaborately designed and fabricated by a scalable electrospray and template method. The FeS 2 @HCS anode exhibits a remarkable capacity of 425 mAh g −1 at 100 mA g −1 after 100 cycles, accompanied by a pimping capacity fading of 0.05% per cycle and a superior rate capacity of 302 mAh g −1 at 2.0 A g −1 . Such outstanding electrochemical properties could be ascribed to the distinct microstructure of FeS 2 nanoparticles anchored on the inner wall of hollow carbon spheres and the protective N/S-doped carbon shell. This work not only furnishes a convenient and scalable way to obtain high-powered electrodes for PIBs but also offers a facile way to enhance the charge transportation kinetics of yolk−shell-structured composites.

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