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With the proliferation of the fifth generation (5G) communication technology, another boom of online education will come, and reshape our traditional learning model. Inspired by the literature on online education platform, this paper establishes a model for the factors affecting the acceptance of online education platform among college students based on the theory of planned behavior (TPB), and put forward several hypotheses on the influence of multiple factors over the acceptance. Then, a scientific questionnaire was designed and distributed online to college students. The survey data were subject to descriptive analysis and correlation analysis. The results show that college students have considered online education platforms an important learning tool; the acceptance of online education platform among college students is positively affected by such factors as personal value, course satisfaction, teacher quality, social influence, and self-efficacy. The research results provide a good reference for the development of online education in China.

Depression is a common and highly debilitating psychiatric illness. However, the pathophysiology of depression is not fully understood. In this study SpragueDawley rats were exposed to chronic unpredictable mild stress (CUMS) to induce depression. A metabonomic study on plasma of CUMS-induced depressive rats was performed to research the pathologic mechanism of depression by using 1 H nuclear magnetic resonance (NMR) spectroscopy and ultra performance liquid chromatography coupled to mass spectrometry (UPLC-MS). Clear separations between depressive rats and control rats were observed by principal component analysis (PCA) based on the data obtained using both analytical techniques and 18 significantly changed metabolites were identified as potential biomarkers of depression. Depressive rats were characterized by altered levels of plasma lysophosphatidylcholines, amino acids, cholic acid, choline, lactate, glycoproteins, glucose, ketone bodies, nucleosides and gut microflora metabolites, which were related to multiple perturbed metabolic pathways and contributed to the elucidation of the complex mechanism of depression. To the best of our knowledge, this is the first plasma metabonomic study on CUMS-induced depressive rats by using two complementary analytical technologies. Our results showed that metabonomic approach offers a useful tool to identify depression-specific biomarkers and provide new insights into the pathophysiology of depression.

Nevertheless, the mostly used graphite anode is gradually unable to meet the evergrowing needs due to its low theoretical capacity (372 mAh g −1 ). [1] Lithium (Li) metal is considered as the "holy grail" of LIBs because of its high theoretical capacity (3860 mAh g −1 ) and the lowest redox potential (−3.04 V vs reversible hydrogen electrode) of all other anodes, [2] but its use in LIBs is limited by its low coulombic efficiency (CE) and safety concerns. At the Li plating/stripping processes, nonuniform Li deposition and tremendous volume changes rupture the fragile solid electrolyte interphase (SEI) film, thus exposing fresh Li to react with the electrolyte and reducing CE. Li preferentially nucleates and grows at the crack of SEI film, and eventually grows into Li dendrites during the constant Li plating/ stripping. Li dendrites tend to become "dead Li" and hence reduce CE. Moreover, Li nucleation and growth will accumulate preferably on the location where local current density is higher than other parts, thus forming dendrites. [3,4] The continuous growth of Li dendrites pierce through the separator and get to the cathode, resulting in the electrical contact and short circuit, which lead to security risk. [5,6] There are many strategies to solve the above problems, including optimization of electrolyte composition, [7] construction of artificial SEI film, [8] diaphragm modification, [9] and modulation of collector structure. According to the Sand's time model, the electrode current density is an important factor affecting Li deposition morphology. [10] Three-dimensional (3D) collectors can effectively reduce the local current density owing to the high surface area. In addition, the 3D interior space can efficiently accommodate deposited Li metal, thus alleviate tremendous volume changes. Based on this principle, a wide variety of current collector, such as copper foam, [11] nickel foam, [12] porous carbon, [13] metal nanowires, [14] carbon tube, [15] carbon cloth, [16] carbon fibers, [17] 3D graphene, [18] and polymeric fiber, [19,20] have been investigated for applications in Li metal batteries. Among them, most 3D current collectors are not only inapplicable for the typical slurry pasting approach, but also detrimental to reducing the weight and size of the cell. [21] Apart from that, most of them are not sufficiently lithiophilic to guide the uniform Li deposition. Especially, copper (Cu) shows a higher overpotential for Li nucleation than the others. [22] Porous carbon-based materials are considered to have great potential Lithium (Li) metal is an excellent anode of Li ion batteries because of its high theoretical capacity and the low redox potential compared to other anodes. However, the uncontrollable growth of Li dendrites still incurs serious safety issues and poor electrochemical performances, leading to its limited practical application. An oxygen and boron codoped honeycomb carbon skeleton (OBHcCs) is reported and a stable Li metal-based anode is realized. It can be coated on a copper foil substrate...

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Anode materials with superior electrochemical performance are urgently needed for the development of sodium (Na)-ion batteries (NIBs). Ternary phosphides can deliver better electrochemical performance than binary counterparts due to the...

V-based materials are widely applied to cathode material for aqueous zinc ion batteries due to the high potentials of V5+ provide thermodynamic basis to Zn2+ transition. Isotropy of high entropy...

MoP is a promising anode material choice for alkali ion storage ascribed to its superior electrochemical performance. However, severe volume expansion and poor stability limited its output performance. Here, well-dispersed MoP nanoparticles are confined in carbon nanofiber skeleton by facile electrospinning method, further introduction of titania enhances the interfacial reaction and structure stability. As a result, the carbon nanofiber encapsulated MoP/TiO 2 composite exhibited 150 mAh g −1 at 1 A g −1 for 4000 cycles, without obvious capacity decay. The homogenous dispersion and heterostructure construction contribute to its superior performance. This design provides a simple way for the phosphide preparation.