Carbonized biopolymers

Details Carbonized biopolymers Carbonized biopolymers

C - Chemistry, Metallurgy

01

B

C01B 31/02 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2637269

A carbon material suitable for the preparation of electrodes for electrochemical capacitors is obtained by single-stage carbonization of biopolymers with a large content of heteroatoms. Neither addition of an activating agent during carbonization nor subsequent gas phase activation is necessary. Several biopolymers which are available by extraction from seaweed are suitable precursors. Alternatively, the seaweed containing such biopolymers is carbonized directly.

L'invention concerne une matière carbonée convenant pour la préparation d'électrodes destinées à des condensateurs électrochimiques, qui est obtenue par la carbonisation en une seule étape de biopolymères à forte teneur en hétéroatomes. Le procédé d'obtention de cette matière ne requiert ni ajout d'un agent d'activation pendant la carbonisation, ni activation ultérieure de phase gazeuse. Plusieurs biopolymères pouvant être extraits d'algues constituent des précurseurs appropriés. Dans un autre mode de réalisation, l'algue contenant ces biopolymères est carbonisée directement.

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