Electrode (anode and cathode) performance enhancement by composite formation with graphene oxide

摘要

Described is an electrode comprising and preferably consisting of electronically active material (EAM) in nanoparticulate form and a matrix, said matrix consisting of a pyrolization product with therein incorporated graphene flakes and optionally an ionic lithium source. Also described are methods for producing a particle based, especially a fiber based, electrode material comprising a matrix formed from pyrolized material incorporating graphene flakes and rechargeable batteries comprising such electrodes.

主权项

1. A method for producing a particle based, especially a fiber based electrode material comprising the steps of
(A) preparing an electronically active precursor material comprising dispersion, said dispersion comprising (i) a soluble lithium source and a hydroxide source, especially lithium hydroxide, and (ii) an at least partially organic substance that is water soluble and that—mixed with electronically active material—can be pyrolized, and (iii) electronically active material (EAM), and (iv) graphene oxide (GO) (B) separating the solid electronically active precursor material from the liquid phase, (C) drying the electronically active precursor material of step (B) (D) pyrolizing the electronically active precursor material of step (C) to yield an active electrode material.