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A Hybrid Electrode of Co3O4@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors

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分类：TB33[一般工业技术—材料科学与工程] TM53[电气工程—电器]
作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University
相关基金：financially supported by the National Natural Science Foundation of China(Grant No.21171035;51472049 and 51302035);the Key Grant Project of Chinese Ministry of Education(Grant No.313015);the PhD Programs Foundation of the Ministry of Education of China(Grant No.20110075110008 and20130075120001);the National 863 Program of China(Grant No.2013AA031903);the Science and Technology Commission of Shanghai Municipality(Grant No.13ZR1451200);the Fundamental Research Funds for the Central Universities;the Program Innovative Research Team in University(IRT1221);the Shanghai Leading Academic Discipline Project(Grant No.B603);the Program of Introducing Talents of Discipline to Universities(No.111-2-04)

作者： Xiaojun Yang, Kaibing Xu, Rujia Zou, Junqing Hu

关键词： Co3O4@PPy, Core/shell, NANOSHEET, ARRAYS, SUPERCAPACITORS, Co3O4@PPy, Core/shell nanosheet arrays, Supercapacitors

中文摘要：

Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co3O4 nanosheet as a core, PPy as a shell. Benefiting from the PPy as conducting polymer improving an electron transport rate as well as synergistic effects from such a core/shell structure, a hybrid electrode made of the Co3O4@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm-2at the current density of 2 m A cm-2, a *4-fold enhancement compared with the pristine Co3O4electrode; furthermore, this hybrid electrode also displays good rate capability(*65 % retention of the initial capacitance from 2 to 20 m A cm-2) and superior cycling performance（*85.5 % capacitance retention after 5000 cycles）. In addition, the equivalent series resistance value of the Co3O4@PPy hybrid electrode（0.238 X） is significantly lower than that of the pristine Co3O4electrode（0.319 X）. These results imply that the Co3O4@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.

英文摘要：

Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co3O4 nanosheet as a core, PPy as a shell. Benefiting from the PPy as conducting polymer improving an electron transport rate as well as synergistic effects from such a core/shell structure, a hybrid electrode made of the Co3O4@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm(-2) at the current density of 2 mA cm(-2), a similar to 4-fold enhancement compared with the pristine Co3O4 electrode; furthermore, this hybrid electrode also displays good rate capability (similar to 65 % retention of the initial capacitance from 2 to 20 mA cm(-2)) and superior cycling performance (similar to 85.5 % capacitance retention after 5000 cycles). In addition, the equivalent series resistance value of the Co3O4@PPy hybrid electrode (0.238 Omega) is significantly lower than that of the pristine Co3O4 electrode (0.319 Omega). These results imply that the Co3O4@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.