TY - JOUR
T1 - Reactivity of lithium exposed graphite surface
AU - Harilal, S. S.
AU - Allain, J. P.
AU - Hassanein, A.
AU - Hendricks, M. R.
AU - Nieto-Perez, M.
PY - 2009/7/30
Y1 - 2009/7/30
N2 - Lithium as a plasma-facing component has many attractive features in fusion devices. We investigated chemical properties of the lithiated graphite surfaces during deposition using X-ray photoelectron spectroscopy and low-energy ion scattering spectroscopy. In this study we try to address some of the known issues during lithium deposition, viz., the chemical state of lithium on graphite substrate, oxide layer formation mechanisms, Li passivation effects over time, and chemical change during exposure of the sample to ambient air. X-ray photoelectron studies indicate changes in the chemical composition with various thickness of lithium on graphite during deposition. An oxide layer formation is noticed during lithium deposition even though all the experiments were performed in ultrahigh vacuum. The metal oxide is immediately transformed into carbonate when the deposited sample is exposed to air.
AB - Lithium as a plasma-facing component has many attractive features in fusion devices. We investigated chemical properties of the lithiated graphite surfaces during deposition using X-ray photoelectron spectroscopy and low-energy ion scattering spectroscopy. In this study we try to address some of the known issues during lithium deposition, viz., the chemical state of lithium on graphite substrate, oxide layer formation mechanisms, Li passivation effects over time, and chemical change during exposure of the sample to ambient air. X-ray photoelectron studies indicate changes in the chemical composition with various thickness of lithium on graphite during deposition. An oxide layer formation is noticed during lithium deposition even though all the experiments were performed in ultrahigh vacuum. The metal oxide is immediately transformed into carbonate when the deposited sample is exposed to air.
KW - Lithium
KW - Lithium-graphite intercalation
KW - Low-energy ion scattering spectroscopy
KW - Plasma-facing components
KW - X-ray photoelectron spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=67650471146&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2009.06.009
DO - 10.1016/j.apsusc.2009.06.009
M3 - Artículo
AN - SCOPUS:67650471146
SN - 0169-4332
VL - 255
SP - 8539
EP - 8543
JO - Applied Surface Science
JF - Applied Surface Science
IS - 20
ER -