title: Galvanic displacement assembly of ultrathin Co3O4nanosheet arrays on nickel foam for a high-performance supercapacitor.
abstract: High-performance supercapacitors are very desirable for many portable electronic devices, electric vehicles and high-power electronic devices. Herein, a facile and binder-free synthesis method, galvanic displacement of the precursor followed by heat treatment, is used to fabricate ultrathin Co3O4nanosheet arrays on nickel foam substrate. When used as a supercapacitor electrode the prepared Co3O4on nickel foam exhibits a maximum specific capacitance of 1095 F g-1at a current density of 1 A g-1and good cycling stability of 71% retention after 2000 cycling tests. This excellent electrochemical performance can be ascribed to the high specific surface area of each Co3O4nanosheet that comprises numerous nanoparticles.
authors.affiliation: Key Laboratory of Artificial Structure and Quantum Control, Ministry of Education, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
authors.forename: Yuxiu
authors.initials: Y
authors.lastname: You
authors.forename: Maojun
authors.initials: M
authors.lastname: Zheng
authors.forename: Liguo
authors.initials: L
authors.lastname: Ma
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Yuan
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Faze
authors.initials: F
authors.lastname: Wang
authors.forename: Jingnan
authors.initials: J
authors.lastname: Song
authors.forename: Dongkai
authors.initials: D
authors.lastname: Jiang
authors.forename: Pengjie
authors.initials: P
authors.lastname: Liu
authors.forename: Li
authors.initials: L
authors.lastname: Ma
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Shen