rGO-ZnO nanowire deposited filamentous seaweed nanofibrous cellulose for paper supercapacitor

Nanosized architectural (A Spider’s web) structure of cellulose (I α ) was extracted from green seaweed Chaetomorpha antennina by using bleaching treatment. Further, reduced graphene oxide (rGO) and zinc oxide (ZnO) nanowire deposited over seaweed cellulose by using simple hydrothermal method. Simple press method was used to prepare rGO-ZnO seaweed cellulose nanocomposite for paper supercapacitor. This rGO-ZnO seaweed cellulose paper anode material was characterized by using various analytical techniques such as FT-IR, SEM, TGA, XRD and tensile test. XRD peaks reveals that when graphene oxide powder mixed with seaweed cellulose, it was reduced and gave Xrd peak of reduced Graphene oxide (rGO). This paper supercapacitors were tested in CV, GCD and EIS. From GCD, the specific energy density of ZnO- cellulose paper device is found to be 0.00066 Wh/kg whereas, for rGO-ZnO cellulose paper device have greater energy density of 5.21 Wh/kg. From EIS, the series resistance of ZnO- cellulose is found to be 326 Ω and for ZnO-rGO -cellulose is 2.16 Ω. This marine resources based rGO-ZnO seaweed cellulose paper supercapacitor have application in various energy storage domains including electric vehicles and electronic industries because it is bio-degradable, cost effective, thinnest, safe to use as well as high performance.