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Chemical processes during solid state reaction of carbon with alkali salts prepared for gravimetric hydrogen storage measurements

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Skákalová,  V.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Roth,  S.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Skákalová, V., Quintel, A., Choi, Y. M., Roth, S., Becher, M., & Hirscher, M. (2002). Chemical processes during solid state reaction of carbon with alkali salts prepared for gravimetric hydrogen storage measurements. Chemical Physics Letters, 365(3-4), 333-337.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EEDD-E
Abstract
The chemical processes connected with the so-called solid state
reaction performed for doping carbon material with alkali
metals (alkali metal: lithium) were studied. The as-treated
carbon material shows a large reversible mass change during
gravimetric measurements performed under hydrogen flow. The
mass change, however, is found not to be related to hydrogen
storage and release but to adsorption and desorption of water.
When heated in the presence of carbon under flowing hydrogen,
the alkali salts transform into alkali oxides which are highly
hygroscopic. The chemical processes during the solid state
reaction are identified by X-ray diffraction analysis,
differential scanning calorimetry and mass spectrometry. (C)
2002 Elsevier Science B.V. All rights reserved.