Improving mass loading while maintaining high transparency and large surface area in one self-supporting graphene film is still a challenge. Unfortunately, all of these factors are absolutely essential for enhancing the energy storage performance of transparent supercapacitors for practical applications. To solve the above bottleneck problem, we produce a novel self-supporting flexible and transparent graphene film (STF-GF) with wrinkled-wall-assembled opened-hollow polyhedron building units. Taking advantage of the microscopic morphology, the STF-GF exhibits improved mass loading with high transmittance (70.2% at 550 nm), a large surface area (1105.6 m/g), and good electrochemical performance: high energy (552.3 μWh/cm), power densities (561.9 mW/cm), a superlong cycle life, and good cycling stability (the capacitance retention is ∼94.8% after 20,000 cycles).

Micro-structured interconnected ribbon-like graphene sheet hanging in polygonal graphene walls was developed; the ribbons were formed along grain boundaries during the NaCl multistage-recrystallization process.

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Penetrating into the inner surface of porous metal-oxide nanostructures to encapsulate the conductive layer is an efficient but challenging route to exploit high-performance lithium-ion battery electrodes. Furthermore, if the bonding force on the interface between the core and shell was enhanced, the structure and cyclic performance of the electrodes will be greatly improved. Here, vertically aligned interpenetrating encapsulation composite nanoframeworks were assembled from Cl − /SO 3 2− -codoped poly(3,4-ethylenedioxythiophene) (PEDOT) that interpenetrated and coated on porous Fe 2 O 3 nanoframeworks (PEDOT-IE-Fe 2 O 3 ) via a onestep Fe 3+ -induced in situ growth strategy. Compared with conventional wrapped structures and methods, the special PEDOT-IE-Fe 2 O 3 encapsulation structure has many advantages. First, the codoped PEDOT shell ensures a high conductive network in the composites (100.6 S cm −1 ) and provides interpenetrating fast ion/ electron transport pathways on the inner and outer surface of a single composite unit. Additionally, the pores inside offer void space to buffer the volume expansion of the nanoscale frameworks in cycling processes. In particular, the formation of Fe−S bonds on the organic−inorganic interface (between PEDOT shell and Fe 2 O 3 core) enhances the structural stability and further extends the cell cycle life. The PEDOT-IE-Fe 2 O 3 was applied as lithium-ion battery anodes, which exhibit excellent lithium storage capability and cycling stability. The capacity was as high as 1096 mA h g −1 at 0.05 A g −1 , excellent rate capability, and a long and stable cycle process with a capacity retention of 89% (791 mA h g −1 ) after 1000 cycles (2 A g −1 ). We demonstrate a novel interpenetrating encapsulation structure to highly enhance the electrochemical performance of metal-oxide nanostructures, especially the cycling stability, and provide new insights for designing electrochemical energy storage materials.

A kind of 3D micro-structured transparent and free-standing film assembled by graphene-hollow-cubes with network-faces was developed using a micro-structured NaCl template.

As mountain-based health and wellness tourism increases, destination competitiveness becomes ever fiercer. The pre-visit expectations and post-visit perceptions of tourists and the tourists’ behavioral intentions are related to the competitiveness of mountain-based health and wellness tourist destinations. Using structural equation modeling (SEM), we explored the factors that affect destination competitiveness and its relationships with tourism satisfaction and tourists’ behavioral intentions to return to and to recommend the location to others. We used a questionnaire for data collection from 550 tourists who visited a mountain-based health and wellness tourist destination in Panzhihua, China. The results suggested that there is an indirect positive correlation between tourists’ satisfaction and destination competitiveness, as well as a direct positive correlation between behavioral intentions and destination competitiveness, illustrating that tourist behavioral intentions can be an important factor in destination competitiveness. In the case of Panzhihua, the tourist source market in China has provided a competitive edge to this city. In addition, considering the environment’s capacity, developing an intention to return in tourists is important for tourism marketing in view of the increasing mountain-based health and wellness tourism competitiveness and concerns about sustainability.

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Transition metal oxides with high specific capacitance materials are ideal for a new generation of high-performance transparent supercapacitors but are rarely reported. Commonly, the synthesis of the required nanostructured materials is a crucial step required to achieve the transparency of the device. In this study, a FeO nanowire network transparent film is developed simply through air-solution interface reactions and wrapped in graphene shells for use as transparent electrodes. The FeO nanowire networks surrounded by the graphene layer exhibit an effective encapsulation structure, providing rapid three-dimensional electron and ion transport pathways. The specific areal capacitance (3.3 mF cm at a scan rate of 10 mV s) was greatly improved, which is at least one hundred times higher than that for transparent devices based on planar chemical vapor deposition graphene. Furthermore, the films have a power density of 191.3 W cm, which is higher than that of electrolytic capacitors, an energy density of 8 mWh cm, which is comparable to that of lithium thin-film batteries, and superior cycling stability.