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- Title
Toward Ultrahigh-Capacity V<sub>2</sub>O<sub>5</sub> Lithium-Ion Battery Cathodes via One-Pot Synthetic Route from Precursors to Electrode Sheets.
- Authors
Lee, Jung Han; Kim, Ju-Myung; Kim, Jung-Hwan; Jang, Ye-Ri; Kim, Jeong A; Yeon, Sun-Hwa; Lee, Sang-Young
- Abstract
Acquisition of high-energy density is the highest priority requirement and unending challenge in energy storage systems including lithium-ion batteries (LIBs). One theoretically preferable way to reach this goal is the use of cathode active materials such as vanadium pentoxide (V2O5) that relies on multielectron insertion/extraction reactions. Application of V2O5 to LIB cathodes, however, has been mostly focused on V2O5 materials themselves with little emphasis on V2O5-incorporated cathode sheets. Here, as an unusual electrode-architecture approach to achieve ultrahigh-capacity V2O5 cathode sheets, a new class of self-standing V2O5 cathode sheets is demonstrated based on V2O5/multiwalled carbon tubes (MWNTs) mixtures spatially besieged by polyacrylonitrile nanofibers (referred to as 'VMP cathode sheets'). Notably, the VMP cathode sheet is fabricated directly via one-pot synthetic route starting from V2O5 precursor (i.e., through concurrent electrospraying/electrospinning followed by calcination), without metallic foil current collectors/carbon powders/polymeric binders. The one-pot synthesis allows dense packing of V2O5 nanoparticles in close contact with MWNT electronic networks and also formation of well-developed interstitial void channels (ensuring good electrolyte accessibility). This material/architecture uniqueness of the VMP cathode sheet eventually enables significant improvements in cell performance (particularly, gravimetric/volumetric capacity of cathode sheets) far beyond those accessible with conventional electrode technologies.
- Subjects
LITHIUM-ion batteries; VANADIUM pentoxide; CATHODES; ELECTRODES; ENERGY storage; NANOPARTICLES
- Publication
Advanced Materials Interfaces, 2016, Vol 3, Issue 14, pn/a
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.201600173