Edge-NFx (x=1 or 2) Protected Graphitic Nanoplatelets as a Stable Lithium Storage Material
Cited 0 times inCited 0 times in
- Edge-NFx (x=1 or 2) Protected Graphitic Nanoplatelets as a Stable Lithium Storage Material
- Noh, Hyuk-Jun; Liu, Shenghong; Yu, Soo-Young; Fan, Qinghua; Xiao, Feng; Xu, Jiantie; Jeon, In-Yup; Baek, Jong-Beom
- Issue Date
- WILEY-V C H VERLAG GMBH
- BATTERIES & SUPERCAPS
- Edge-NFx (x=1 or 2) protected graphitic nanoplatelets (NFGnPs) are synthesized for the first time as a stable anode material for lithium storage. The NFGnPs are prepared via mechanochemical reaction, by ball-milling graphite in the presence of nitrogen trifluoride (NF3) gas. The average grain size of the NFGnPs is dramatically reduced compared to the starting graphite. The ball-milling effectively unzips graphitic C-C bonds, generating active carbon species (C-.), which form edge C-NFx bonds and delaminate the graphite layers into a few layered NFGnPs. The resulting NFGnPs have a large specific surface area (671.0 m(2) g(-1)). The edge functionalities of the NFGnPs consist of major C(C)=NF1 and minor C-NF2 moieties. Because of their large specific surface area, the NFGnPs display high average reversible capacities of 850.5, 722.4, 576.4, 482.0, 369.1, 229.7, 127.5 mAh g(-1) at 0.2, 0.5, 1, 2, 5 and 10 C, respectively, with excellent rate capability. More importantly, due to the edge protection provided by the stable C(C)=NF1 bonds (pseudo-aromatic), the NFGnPs maintain a high reversible charge capacity of 421.6 mAh g(-1) at 2 C, with an initial capacity retention of 78.3 % after 200 cycles.
- Appears in Collections:
- ECHE_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.