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Heat-resistant supercapacitors with excellent mechanical strength are highly required for flexible and wearable electronics in our daily life. Here, high-performance and heat-resistant solid-state ...

Directional transport and manipulation of liquid substances have drawn wide attention owing to their crucial applications from microfluid to large-area water harvesting. Spontaneous oil directional transport, especially having the prospect of large-scale manufacturing, plays a huge role in marine oil cleanup, but is exposed to the limitations such as low efficiency and transport velocity. Here, we report a biomimetic porous nanofiber-based oil pump from cosolvent electrospinning, endowed with the parenchyma cellular structure of plants. These tightly packed and uniform nanoporous structures of nanofibers are capable of self-pumping oil upward with an ultrahigh pumping rate of 21.12 g g-1 h-1, which has been proposed as an explicit mechanism. Following oil directional transport, it can obtain an efficient oil collection of 127.52 g g-1. We anticipate that our designed oil pump will provide a versatile platform for spontaneous oil directional transport and collection with potential applications in the fields of laboratory-on-a-chip, microreaction devices, chemical engineering, and the petrochemical industry.

Cyclization reaction is a crucial step during heat treatment process of polyacrylonitrile (PAN)-based carbon fibers (CFs). In this work, in-situ infrared spectroscopy and two-dimensional (2D) corre...

The Co/N-doped carbon material, as an important electrocatalytic material, has been attracted intense interest in ORR and Zn-air battery. Here, we report an efficient Co@N-doped carbon catalyst (Co@N-C-1) obtained by pyrolysis of ZIF precursor with 2-aminobenzimidazole. The introduction of 2-aminobenzimidazole results in the formation of hierarchical meso/microporous structure of the as-prepared Co@N-C-1, effectively avoiding the aggregation of Co nanoparticles during pyrolysis and the higher N content, which contributes to enhance the ORR electrocatalytic activities. The obtained Co@N-C-1 exhibits remarkable ORR performance with a half-wave potential of 0.938 V vs RHE in alkaline media. As the air catalyst of zinc-air batteries, Co@N-C-1 displays 1.439 V of open-circuit voltage and 1413.3 Wh·kg-1 of energy density.