title: 1D Ni-Co oxide and sulfide nanoarray/carbon aerogel hybrid nanostructures for asymmetric supercapacitors with high energy density and excellent cycling stability.
abstract: The fabrication of supercapacitor electrodes with high energy density and excellent cycling stability is still a great challenge. A carbon aerogel, possessing a hierarchical porous structure, high specific surface area and electrical conductivity, is an ideal backbone to support transition metal oxides and bring hope to prepare electrodes with high energy density and excellent cycling stability. Therefore, NiCo2S4nanotube array/carbon aerogel and NiCo2O4nanoneedle array/carbon aerogel hybrid supercapacitor electrode materials were synthesized by assembling Ni-Co precursor needle arrays on the surface of the channel walls of hierarchical porous carbon aerogels derived from chitosan in this study. The 1D nanostructures grow on the channel surface of the carbon aerogel vertically and tightly, contributing to the enhanced electrochemical performance with ultrahigh energy density. The energy density of NiCo2S4nanotube array/carbon aerogel and NiCo2O4nanoneedle array/carbon aerogel hybrid asymmetric supercapacitors can reach up to 55.3 Wh kg-1and 47.5 Wh kg-1at a power density of 400 W kg-1, respectively. These asymmetric devices also displayed excellent cycling stability with a capacitance retention of about 96.6% and 92% over 5000 cycles.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China. tangb@sdnu.edu.cn.
authors.forename: Pin
authors.initials: P
authors.lastname: Hao
authors.affiliation: School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, P. R. China.
authors.forename: Jian
authors.initials: J
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China. hongliu@sdu.edu.cn.
authors.forename: Yuanhua
authors.initials: Y
authors.lastname: Sang
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30032, USA.
authors.forename: Chia-Chi
authors.initials: CC
authors.lastname: Tuan
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China. tangb@sdnu.edu.cn.
authors.forename: Guanwei
authors.initials: G
authors.lastname: Cui
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China. tangb@sdnu.edu.cn.
authors.forename: Xifeng
authors.initials: X
authors.lastname: Shi
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30032, USA.
authors.forename: C P
authors.initials: CP
authors.lastname: Wong
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China. tangb@sdnu.edu.cn.
authors.forename: Bo
authors.initials: B
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China. hongliu@sdu.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Liu