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High-strength carbon nanotube (CNT) fibers are strongly desired as they offer both excellent mechanical and electrical properties compared to traditional fiber materials. Here, we adopt twisting and compression as two complementary steps to tailor the fiber structure and obtain extraordinary mechanical properties. We have fabricated twist-compressed ribbon-like CNT fibers with predefined, uniform,...
Porous materials such as foams, sponges and aerogels typically exhibit large energy dissipation during deformation, resulting in structural weakening and incomplete recovery. Here, we adopted a vapor deposition method to introduce a uniform amorphous carbon (AC) coating with controlled thickness throughout the porous network, on the surface of individual carbon nanotubes (CNTs) as well as their junctions,...
We report a lithium–air battery with a free-standing, highly porous Pd-modified carbon nanotube (Pd–CNT) sponge cathode. The Pd-CNT sponge was synthesized through a chemical vapor deposition growth followed with an electrochemical deposition process. To build a whole lithium–air battery, the air cathode is integrated with a ceramic electrolyte-protected lithium metal anode and non-volatile ionic liquid...
Hierarchical structures consisting of carbon nanotubes (CNTs) grafted onto a carbon fiber (CF) have the potential to improve the performance of fiber/polymer composites. The strength between a CNT and a CF is a key factor that influences the load-transfer behavior and inter-laminar properties. Here, we directly measured the grafting strength of a chemically bonded CNT–CF hierarchical structure by...
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