Three-dimensional layer-by-layer anode structure based on Co3O4 nanoplates strongly tied by capillary-like multiwall carbon nanotubes for use in high-performance lithium-ion batteries.

A layer-by-layer (LBL) structure composed of Co3O4 nanoplates and capillary-like three-dimensional (3D) multiwall carbon nanotube (MWCNT) nets was developed as an anode with simultaneous high-rate and long-term cycling performance in a lithium-ion battery. As the current density was increased to 50 A g(-1), the LBL structure exhibited excellent long-term cycling and rate performance. Thus, the Co3O4 nanoplates were in good electrical contact with the capillary-like 3D MWCNT nets under mechanically severe strain during long-term, high-rate cyclic operation.

Phase transition method to form Group 6A nanoparticles on carbonaceous templates.

Considerable effort has been made to develop unique methods of preparing and characterizing nanoparticles and nanocomposites in order to exploit the true potential of nanotechnology. We used a facile, versatile phase-transition method for forming Group 6A nanoparticles on carbonaceous templates to produce homogeneous 5-10 nm diameter Group 6A nanoparticles on carbon nanotubes (CNTs) and reduced graphene oxide (RGO), to obtain nanocomposites. The method involved melting and recrystallizing mixtures of elemental sulfur and either CNTs or RGO on carbonaceous templates.