Co3O4 Nanoparticles Embedded in Nitrogen-Doped Graphitic Carbon Fibers As a Free-Standing Electrode for Promotion of Lithium Ion Storage with Capacitive Contribution.

Here, we wrap Co3O4 nanoparticles with nitrogen-doped graphitic carbon nanofibers (Co3O4@NGFs) as a self-standing electrode for lithium-ion batteries. In this structure, graphitic carbon acts as a composite framework that enhances conductivity, accommodates volume expansion and increases contact with the electrolyte. Meanwhile, the porosity of Co3O4@NGFs not only facilitates rapid electron transfer, but also exposes more active sites for lithium storage.