Abstract
Novel hollow porous VOx/C nanoscrolls are synthesized by an annealing process with the VOx/octadecylamine (ODA) nanoscrolls as both vanadium and carbon sources. In the preparation, the VOx/ODA nanoscrolls are first achieved by a two-phase solvothermal method using ammonium metavanadat as the precursor. Upon subsequent heating, the intercalated amines between the vanadate layers in the VOx/ODA nanoscrolls decompose into gases, which escape from inside the nanoscrolls and leave sufficient pores in the walls. As the anodes of lithium-ion batteries (LIBs), such hollow porous VOx/C nanoscrolls possess exceedingly high capacity and rate capability (904 mAh g-1 at 1 A g-1) and long cyclic stability (872 mAh g-1 after 210 cycles at 1 A g-1). The good performance is derived from the unique structural features of the hollow hierarchical porous nanoscrolls with low crystallinity, which could significantly suppress irreversible Li+ trapping as well as improve Li+ diffusion kinetics. This universal method of annealing amine-intercalated oxide could be widely applied to the fabrication of a variety of porous electrode materials for high-performance LIBs and supercapacitors.
Original language | English |
---|---|
Pages (from-to) | 25954-25961 |
Number of pages | 8 |
Journal | ACS Applied Materials and Interfaces |
Volume | 8 |
Issue number | 39 |
DOIs | |
Publication status | Published - 2016 Oct 5 |
Externally published | Yes |
Keywords
- VO/C nanoscrolls
- anodes
- hollow
- lithium-ion batteries
- low-crystalline
ASJC Scopus subject areas
- Materials Science(all)