title: Reconstruction of TiO2/MnO2-C nanotube/nanoflake core/shell arrays as high-performance supercapacitor electrodes.
abstract: Construction of electrodes with fast reaction kinetics is of great importance for achieving advanced supercapacitors. Herein we report a facile combined synthetic strategy with atomic layer deposition (ALD) and electrodeposition to rationally fabricate nanotube/nanoflake core/shell arrays. ALD-TiO2nanotubes are used as the skeleton core for assembly of electrodeposited MnO2-C nanoflake shells forming a core/shell structure. Highly porous architecture and good electrical conductivity are combined in this unique core/shell structure, resulting in fast ion/electron transfer. In tests of electrochemical performance, the TiO2/MnO2-C core/shell arrays are characterized as cathode for asymmetric supecapacitors and exhibit high specific capacitance (880 F g-1at 2.5 A g-1), excellent rate properties (735 F g-1at 30 A g-1) and good long-term cycling stability (94.3% capacitance retention after 20 000 cycles). The proposed electrode construction strategy is favorable for fabrication of other advanced supercapacitor electrodes.
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.
authors.forename: Qinqin
authors.initials: Q
authors.lastname: Xiong
authors.forename: Cun
authors.initials: C
authors.lastname: Zheng
authors.forename: Hongzhong
authors.initials: H
authors.lastname: Chi
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Ji