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Cost efficient bifunctional air cathodes possessing high electrocatalytic activity are of great importance for the development of secondary Zn‐air batteries. In this work, cobalt nanoparticles are encapsulated within a 3D N‐doped open network of carbon tubes (Co@N‐CNTs) by a molten‐salt synthesis procedure conducted at a high temperature. Physical characterization demonstrates that Co@N‐CNTs are comprised...
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