In this work, a novel multilayer solid electrolyte interphase (SEI) is demonstrated to prolong the durability of a lithium-metal anode. It is in situ generated via reducing lithium bis­(oxalate) borate (LiBOB) and fluoroethylene carbonate (FEC) in the electrolyte containing them as additives. The as-obtained SEI could be roughly divided into three layers: the polycarbonates surface membrane, LiF-rich middle layer, and B-containing polymer bottom film corresponding to their sequentially reductive potentials of 0.8, 1.55, and 1.8 V vs Li+/Li, respectively. This special structure prolongs the durability of lithium-metal anode since the elastic bottom layer could buffer the influence of volumetric variation and the LiF-rich middle layer could suppress Li dendrite growth and electrolyte permeation. Benefiting from the protection of this multilayer SEI, LiNi0.88Co0.09Al0.03O2/Li batteries with ultrahigh cathode loading of ∼4.5 mAh cm–2 stably operate for 200 cycles with the accumulated capacity of 750 mAh cm–2 and the coulombic efficiency of 99.78%. This approach provides a simple and efficient strategy to hover lithium-metal anode.

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In this study, silk fabrics were treated with Atmospheric Pressure Glow Discharge (APGD) plasma in the air at a discharge voltage of 35 kV and frequency of 20 kHz. C.I. (Color Index) Natural Yellow 3 was used as a natural dye. The effect of APGD plasma treatment time on the dyeability and colour fastness of silk fabrics has been investigated. The influence of plasma treatment on the surface morphology of silk fabric was characterised using Scanning electron microscopy. X-ray photoelectron spectroscopy measurement showed that the content of nitrogen and oxygen increased with the increasing APGD plasma treatment time. Attenuated Total Reflection Fourier Transform Infrared spectroscopy was used to characterise the functional groups such as -OH, -NH and -COOH on the surface of silk fabrics. The dyeability of silk fabrics was increased obviously after APGD plasma treatment, and the colour fastness of the dyed samples was satisfactory.