An in situ esr study of the kinetics and planar intercalate diffusion constant in acceptor graphite intercalation compounds

1994 ◽  
Author(s):  
A.M. Ziatdiriov ◽  
N.M. Mishchenko
Keyword(s):  
Diffusion Constant ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation

In situ optical study of H2SO4-graphite intercalation compounds

1983 ◽  
Vol 8 (1-2) ◽  
pp. 189-193 ◽  
Author(s):  
M. Saint Jean ◽  
M. Menant ◽  
Nguyen Hy Hau ◽  
C. Rigaux ◽  
A. Metrot
Keyword(s):  
Intercalation Compounds ◽  
Optical Study ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation

Towards High Temperature Actuation Using Graphite Intercalation Compounds

Aerospace ◽  
2005 ◽  
Author(s):  
Cameron Massey ◽  
William Barvosa-Carter ◽  
Ping Liu
Keyword(s):  
Elevated Temperatures ◽  
Pyrolytic Graphite ◽  
Compressive Load ◽  
Intercalation Compounds ◽  
Constant Current ◽  
Graphite Intercalation Compounds ◽  
Good Thermal Stability ◽  
Strain Behavior ◽  
Graphite Intercalation

Electrochemically formed graphite intercalation compounds (GICs) have many intrinsic properties well-suited for compact actuation in applications at high temperatures. GICs using ionic liquids are of interest because of their good thermal stability at elevated temperatures, high ionic conductivity, and low volatility. In this study we observed the potential and strain behavior of highly oriented pyrolytic graphite and 1-ethyl-3-methylimidazolium hexafluorophosphate subjected to a light compressive load and constant current. In situ measurements of the anode during intercalation showed a reversible strain of 2.5% to 4.5% from 100°C up to 250°C.

Binary and Ternary Alkali Graphite Intercalation Compounds: In-Situ X-Ray Study Of Elastic And Electrostatic Effects on Staging

1982 ◽  
Vol 20 ◽  
Author(s):  
M.E. Misenheimer ◽  
P. Chow ◽  
H. Zabel
Keyword(s):  
Interlayer Spacing ◽  
Intercalation Compounds ◽  
Concentration Region ◽  
Graphite Intercalation Compounds ◽  
X Ray ◽  
Small Defect ◽  
Graphite Intercalation ◽  
Spacing Variation ◽  
Elastic Distortion

ABSTRACTWe have studied stage transformations of binary potassium-graphite intercalation compounds by in-situ x-ray (00ℓ) scans. In the transition region of stages one and two, both stages coexist and all Bragg reflections exhibit resolution limited widths. The characteristics of the stage transformation are identical in intercalated HOPG and single crystals. This implies that the stage transformation is a direct process with no need of forming intermediate structures, favoring electrostatic interaction as the dominant stabilizer for pure stage donor compounds. We have also studied the elastic distortion due to potassium atoms substitutionally dissolved in rubidium intercalant layers. From the interlayer spacing variation we find a double force tensor Pzz = 0.36 eV for potassium defects in RbC8 in the small defect concentration region.

scholarly journals Diffusion of alkali metals in the first stage graphite intercalation compounds by vdW-DFT calculations

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 15985-15992 ◽  
Author(s):  
Zhaohui Wang ◽  
Arne Petter Ratvik ◽  
Tor Grande ◽  
Sverre M. Selbach
Keyword(s):  
Dft Calculations ◽  
Alkali Metals ◽  
Diffusion Constant ◽  
Intercalation Compounds ◽  
Interlayer Distance ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation

The diffusion constant of alkali metals in graphite intercalation compounds is proportional to the graphene interlayer distance.

Electron Microscopy of Graphite Intercalation Compounds

1982 ◽  
Vol 40 ◽  
pp. 544-545
Author(s):  
G. Timp ◽  
L. Salamanca-Riba ◽  
L.W. Hobbs ◽  
G. Dresselhaus ◽  
M.S. Dresselhaus
Keyword(s):  
Electron Microscopy ◽  
Phase Transitions ◽  
Domain Wall ◽  
Intercalation Compounds ◽  
Lattice Plane ◽  
Wall Model ◽  
Graphite Intercalation Compounds ◽  
Fundamental Symmetry ◽  
Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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