公开(公告)号：US11845853B2

公开(公告)日：2023-12-19

申请号：US18179337

申请日：2023-03-06

Applicant: ZHEJIANG SCI-TECH UNIVERSITY

Inventor： Yanjun Tang ,  Zejun Ding ,  Tianying Chen

IPC: C08L1/02 ,  C08K3/04

CPC classification number: C08L1/02 ,  C08K3/042

Abstract: The present disclosure discloses methods for preparing a composite film based on reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The method mainly includes: 1. preparing a suspension mixed with graphite oxide and cellulose; 2. centrifuging the suspension obtained in the step (1) and washing the sediment after centrifuging with deionized water to obtain a solution, homogenizing the solution in a high-pressure homogenizer to obtain a suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers; and 3. drying the suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers in a petri dish, and soaking a dried film in a hydroiodic acid solution; and washing the soaked film with deionized water to obtain the composite film of reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The composite film obtained has a higher specific capacitance and a better cycle stability than pure reduced graphene oxide obtained under a same preparation condition.