Patent ID: 11952278
Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 3:
4. The method for preparing lignin porous carbon nanosheets according to claim 1, wherein the method comprises the following specific steps:
(1) dispersing sulfonated lignin and oxalate in water to obtain a matrix solution;
(2) taking A volume fraction of the matrix solution, adding B volume fraction of ethanol thereto while stirring, and separating the precipitate after standing to obtain a lignin/oxalate composite;
(3) likewise taking A volume fraction of the matrix solution, adding the lignin/oxalate composite obtained in step (2) thereto and stirring uniformly, then likewise adding B volume fraction of ethanol, and separating the precipitate after standing to obtain the assembled lignin/oxalate composite;
(4) repeating step (3) several times to obtain the layer-by-layer self-assembled lignin/oxalate composite; and
(5) placing the layer-by-layer self-assembled lignin/oxalate composite in an inert atmosphere, carbonizing it at 550° C. to 850° C. for 2-4 h, and then pickling it to obtain the lignin porous carbon nanosheets.