Sodium ion batteries have attracted tremendous attentions due to its rich resources, low cost, high efficiency and good chemical stability, and can satisfy people's demand for energy in the new era, which are considered a top alternative to lithiumion batteries. The research progress on sodium ion battery anode materials are reviewed in details in this paper, including carbon-based materials, low voltage metal phosphates, the sodium storage alloys, metal oxides, titanium-based materials, and other negative electrode materials. Then the characteristics of anode materials are discussed. Finally, some future directions for sodiumion battery anode materials are pointed out.

he effects of styrene butadiene rubber (SBR) on softening point, penetration and ductility of C₉ petroleum resin modified asphalt were studied. The mechanism for SBR- C₉ petroleum resin-modified asphalt was also discussed. The results show that SBR can effectively improve the softening point of C₉ petroleum resin-modified asphalt. When introducing 4.0% mass fraction of SBR, the performance of modified asphalt could meet the required standard of JTJ036-98. The four components (saturation, aromatic, resin and asphaltene) analytical results indicate that the aromatics content of the modified asphalt system can be increased after adding C₉ petroleum, thus the swelling and adsorption of SBR in the C₉ petroleum resin modified asphalt can be promoted. Electron microscopy result demonstrates that, when the SBR content is 5.0%, the C₉ petroleum resin modified asphalt shows good compatibility, stability, and numerous crazes. A three pitch stable polymer network structure might be formed for the SBR, C₉ petroleum resin, and asphalt system.

It was focused on the pinning control problem for a class of complex dynamic networks with linearly continuoustime coupled nodes. A new method for designing pinning controllers with stochastic pinning viewpoint is firstly proposed, which is referred to be stochastic pinning control. By adding such a controller to a fraction of nodes the stochastic stability of the entire complex networks can be guaranteed. It is claimed that the stochastic pinning control method without adding the selected nodes always could also stabilize the complex networks. By exploiting the robust method, sufficient condition is given for a kind of generally complex networks with coupling matrix changing to be another one, where the designed stochastic pinning controller is still available. Based on the established results, some results with the expectation of Bernouli variable uncertain and unknown are presented too. Finally, the correctness and effectiveness of the proposed methods is verified by a numerical example.