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MoO 2 @N-doped C nanofibers (MoO 2 @NC NFs) were synthesized by electrospinning with polyacrylonitrile as carbon source. The in situ formed MoO 2 nanocrystals are completely embedded in the carbon nanofibers, which can not only accelerate ion transition, but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling. When used as the anode material for both Li/Na-ion batteries, the as-synthesized MoO 2 @NC NFs displayed excellent Li + /Na + storage properties. As the anode for Li-ion battery, the MoO 2 @NC NFs display a high discharge capacity of 930 mA h g −1 at a current density of 200 mA g −1 for 100 cycles, and 720 mA h g −1 at a current density of 1 A g −1 for 600 cycles. Moreover, the discharge capacity of 350 mA h g −1 could be realized at a current density of 100 mA g −1 for 200 cycles for Na-ion battery.

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During hot embossing process of polymer MEMS devices, the parameters such as temperature, pressure and time are important for the duplication precision of patterns. In this work, a novel method of hot embossing lithography for replication of multiple nano bar structure mould was conducted. The effects of hot embossing temperature and pressure on fabrication precision were studied. Linewidth of the pattern on the mould is from 71nm to 980nm. The replicas of nano bar structure were fabricated on the PMMA (polymer methyl methacrylate) layer with silicon substrate. The effects of hot embossing and demoulding temperature on replicating quality were also discussed. Experimental results indicate that higher demoulding temperature help to lessen PMMA leftover and improve the duplication quality. The hot embossing and dmoulding temperature of 110°C～120°C and 60°C～70°C were obtained to produce high quality duplication of multiple nano bar structures. Micro-grating replicas were also fabricated and demonstrated in this paper.

TiO2@C nanospheres could exhibit a discharge capacity of 286.5 mA h g−1 at 100 mA g−1 after 200 cycles.

For electrochemical gas sensors, solid electrolytes play increasingly significant role in improving stability, life-span and other properties. One new but emerging solid electrolyte LaF3 is attractive because of its possible application at room temperature, in addition to other advantages and it has been investigated for measuring various types of gases. Since PtILaF3 sensitive interface is a core part of this kind of gas sensor, reasonable design and fabrication Pt working electrode microstructure is a crucial approach to improve sensitivity, reduce response time of the sensor. In this paper, micro S02 gas sensor based on Pt/LaF3 is proposed, and fluid dynamic simulation software Fluent was used to simulate gas flow around gas/Pt/LaF3 three-phase-boundary (TPB). Pt micro-structure at different micro-scales simulated by Fluent indicates that the scale influences gas-flow status around three-phase-boundary, and actually determines sensitivity and response property.