WO9924359-A  ESSADDEK A ET AL: "PHENOMENES D'INSERTION-DESINSERTION DANS UNE PHASE GRAPHITE-SODIUM -OXYGENE SOUMISE A UNE VAPEUR DE POTASSIUM INTERCALATION DE-INTERCALATION PHENOMENA IN A GRAPHITE-SODIUM- OXYGEN COMPOUND UNDER POTASSIUM VAPOUR" COMPTES RENDUS DE L ACADEMIE DES SCIENCES: SERIE II: MECANIQUE-PH YSIQUE-CHIMIE-ASTRONOMIE, vol. 319, no. 9, 3 novembre 1994, pages 1009-1012, XP000478255;  GORDON & BREACH SCIENCE PUBL INC, NEWARK, NJ, USA: "New graphite intercalation compound containing sodium associated with oxygen" PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON INTERCALATION COMPOUNDS;LOUVAIN-LA-NEUVE, BELG MAY 10-14 1993, vol. 244, 10 mai 1993, pages 29-34, XP002073421 Mol Cryst Liq Cryst Sci Technol Sect A Mol Crys Liq Cryst;Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 1994 Publ by Gordon & Breach cite dans la demandeEP1028914-A  See references of WO 9924359A1FR2770837-A1  ESSADDEK A ET AL: "PHENOMENES D'INSERTION-DESINSERTION DANS UNE PHASE GRAPHITE-SODIUM -OXYGENE SOUMISE A UNE VAPEUR DE POTASSIUM INTERCALATION DE-INTERCALATION PHENOMENA IN A GRAPHITE-SODIUM- OXYGEN COMPOUND UNDER POTASSIUM VAPOUR" COMPTES RENDUS DE L ACADEMIE DES SCIENCES: SERIE II: MECANIQUE-PH YSIQUE-CHIMIE-ASTRONOMIE, vol. 319, no. 9, 3 novembre 1994, pages 1009-1012, XP000478255;  ESSADDEK A ET AL: &quot;PHENOMENES D&apos;INSERTION-DESINSERTION DANS UNE PHASE GRAPHITE-SODIUM -OXYGENE SOUMISE A UNE VAPEUR DE POTASSIUM INTERCALATION DE-INTERCALATION PHENOMENA IN A GRAPHITE-SODIUM- OXYGEN COMPOUND UNDER POTASSIUM VAPOUR&quot; COMPTES RENDUS DE L ACADEMIE DES SCIENCES: SERIE II: MECANIQUE-PH YSIQUE-CHIMIE-ASTRONOMIE, vol. 319, no. 9, 3 novembre 1994, pages 1009-1012, XP000478255;  GORDON &amp; BREACH SCIENCE PUBL INC, NEWARK, NJ, USA: "New graphite intercalation compound containing sodium associated with oxygen" PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON INTERCALATION COMPOUNDS;LOUVAIN-LA-NEUVE, BELG MAY 10-14 1993, vol. 244, 10 mai 1993, pages 29-34, XP002073421 Mol Cryst Liq Cryst Sci Technol Sect A Mol Crys Liq Cryst;Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 1994 Publ by Gordon &amp; Breach;  GORDON &amp; BREACH SCIENCE PUBL INC, NEWARK, NJ, USA: &quot;New graphite intercalation compound containing sodium associated with oxygen&quot; PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON INTERCALATION COMPOUNDS;LOUVAIN-LA-NEUVE, BELG MAY 10-14 1993, vol. 244, 10 mai 1993, pages 29-34, XP002073421 Mol Cryst Liq Cryst Sci Technol Sect A Mol Crys Liq Cryst;Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 1994 Publ by Gordon &amp; BreachWO9924359-A1  ESSADDEK A ET AL: &quot;PHENOMENES D&apos;INSERTION-DESINSERTION DANS UNE PHASE GRAPHITE-SODIUM -OXYGENE SOUMISE A UNE VAPEUR DE POTASSIUM INTERCALATION DE-INTERCALATION PHENOMENA IN A GRAPHITE-SODIUM- OXYGEN COMPOUND UNDER POTASSIUM VAPOUR&quot; COMPTES RENDUS DE L ACADEMIE DES SCIENCES: SERIE II: MECANIQUE-PH YSIQUE-CHIMIE-ASTRONOMIE, vol. 319, no. 9, 3 novembre 1994, pages 1009-1012, XP000478255;  GORDON &amp; BREACH SCIENCE PUBL INC, NEWARK, NJ, USA: &quot;New graphite intercalation compound containing sodium associated with oxygen&quot; PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON INTERCALATION COMPOUNDS;LOUVAIN-LA-NEUVE, BELG MAY 10-14 1993, vol. 244, 10 mai 1993, pages 29-34, XP002073421 Mol Cryst Liq Cryst Sci Technol Sect A Mol Crys Liq Cryst;Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 1994 Publ by Gordon &amp; Breach cit dans la demandeEP1028914-B1  ESSADDEK A ET AL: "PHENOMENES D'INSERTION-DESINSERTION DANS UNE PHASE GRAPHITE-SODIUM -OXYGENE SOUMISE A UNE VAPEUR DE POTASSIUM INTERCALATION DE-INTERCALATION PHENOMENA IN A GRAPHITE-SODIUM- OXYGEN COMPOUND UNDER POTASSIUM VAPOUR" COMPTES RENDUS DE L ACADEMIE DES SCIENCES: SERIE II: MECANIQUE-PH YSIQUE-CHIMIE-ASTRONOMIE, vol. 319, no. 9, 3 novembre 1994, pages 1009-1012, XP000478255;  GORDON & BREACH SCIENCE PUBL INC, NEWARK, NJ, USA: "New graphite intercalation compound containing sodium associated with oxygen" PROCEEDINGS OF THE 7TH INTERNATIONAL SYMPOSIUM ON INTERCALATION COMPOUNDS;LOUVAIN-LA-NEUVE, BELG MAY 10-14 1993, vol. 244, 10 mai 1993, pages 29-34, XP002073421 Mol Cryst Liq Cryst Sci Technol Sect A Mol Crys Liq Cryst;Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 1994 Publ by Gordon & Breach cite dans la demandeUS6403260-B1  D. 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