期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 3, 页码 546-552出版社
AMER CHEMICAL SOC
DOI: 10.1021/am301782h
关键词
CVD; graphene; rapid heating and cooling and lithium-ion battery
资金
- National Science Foundation Scalable Nanomanufacturing Program [DMR-1120187]
- Direct For Mathematical & Physical Scien [1120187] Funding Source: National Science Foundation
- Division Of Materials Research [1120187] Funding Source: National Science Foundation
We study the process of graphene growth on Cu and Ni substrates subjected to rapid heating (approximately 8 degrees C/s) and cooling cycles (approximately 10 degrees C/s) in a modified atmospheric pressure chemical vapor deposition furnace. Electron microscopy followed by Raman spectroscopy demonstrated successful synthesis of large-area few-layer graphene (FLG) films on both Cu and Ni substrates. The overall synthesis time was less than 30 min. Further, the as-synthesized films were directly utilized as anode material and their electrochemical behavior was studied in a lithium half-cell configuration. FLG on Cu (Cu-G) showed reduced lithium-intercalation capacity when compared with SLG, BLG and Bare-Cu suggesting its substrate protective nature (barrier to Li-ions). Although graphene films on Ni (Ni-G) showed better Li-cycling ability similar to that of other carbons suggesting that the presence of graphene edge planes (typical of Ni-G) is important in effective uptake and release of Li-ions in these materials.
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