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要旨:
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.
