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Ruthenium Oxide/Reduced Graphene Oxide Nanoribbon Composite and Its Excellent Rate Capability in Supercapacitor Application
Author(s) -
Wang Ruijing,
Jia Pengfei,
Yang Yuying,
An Ning,
Zhang Yadi,
Wu Hongying,
Hu Zhongai
Publication year - 2016
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500595
Subject(s) - supercapacitor , graphene , ruthenium oxide , oxide , chemistry , electrolyte , composite number , capacitance , electrode , current density , electrochemistry , power density , carbon nanotube , chemical engineering , nanotechnology , composite material , materials science , organic chemistry , power (physics) , physics , quantum mechanics , engineering
Chemical oxidation is used to cut and unzip multi‐walled carbon nanotubes in the transverse direction and the axial direction to form graphene oxide nanoribbon (GONR). Ruthenium oxide/reduced graphene oxide nanoribbon composite (RuO 2 /rGONR) with a 72.5 wt% RuO 2 loading is synthesized through an aqueous‐phase reaction, in which GONR is served as starting material, followed by mild thermal treatment in ambient air. The resulting RuO 2 /rGONR composite achieves specific capacitance up to 677 F·g −1 at the current density of 1 A·g −1 in three‐electrode system using 1 mol·L −1 H 2 SO 4 as electrolyte. The resultant electrode exhibits an excellent rate capability (91.8% retention rate at 20 A·g −1 ). Especially, the symmetric supercapacitor assembled on the basis of RuO 2 /rGONR electrode delivers high energy density (16.2 Wh·kg −1 ) even at the power density of 9885 W·kg −1 , which is very essential for supercapacitors.