%0 Journal Article
%A Shen, Juanjuan
%A Li, Xiaocheng
%A Wan, Liu
%A Liang, Kun
%A Tay, Beng Kang
%A Kong, Lingbin
%A Yan, Xingbin
%D 2016
%T An
Asymmetric Supercapacitor with Both Ultra-High Gravimetric and Volumetric
Energy Density Based on 3D Ni(OH)2/MnO2@Carbon
Nanotube and Activated Polyaniline-Derived Carbon
%U https://acs.figshare.com/articles/journal_contribution/An_Asymmetric_Supercapacitor_with_Both_Ultra-High_Gravimetric_and_Volumetric_Energy_Density_Based_on_3D_Ni_OH_sub_2_sub_MnO_sub_2_sub_Carbon_Nanotube_and_Activated_Polyaniline-Derived_Carbon/4490540
%R 10.1021/acsami.6b12370.s001
%2 https://acs.figshare.com/ndownloader/files/7240580
%K loading density
%K supercapacitor
%K MnO
%K Activated Polyaniline-Derived Carbon Development
%K APDC
%K gravimetric
%K Ni
%K Volumetric Energy Density
%K chemical vapor deposition grown-CNTs
%X Development of a
supercapacitor device with both high gravimetric and volumetric energy
density is one of the most important requirements for their practical
application in energy storage/conversion systems. Currently, improvement
of the gravimetric/volumetric energy density of a supercapacitor is
restricted by the insufficient utilization of positive materials at
high loading density and the inferior capacitive behavior of negative
electrodes. To solve these problems, we elaborately designed and prepared
a 3D core–shell structured Ni(OH)2/MnO2@carbon nanotube (CNT) composite via a facile solvothermal process
by using the thermal chemical vapor deposition grown-CNTs as support.
Owing to the superiorities of core–shell architecture in improving
the service efficiency of pseudocapacitive materials at high loading
density, the prepared Ni(OH)2/MnO2@CNT electrode
demonstrated a high capacitance value of 2648 F g–1 (1 A g–1) at a high loading density of 6.52 mg
cm–2. Coupled with high-performance activated polyaniline-derived
carbon (APDC, 400 F g–1 at 1 A g–1), the assembled Ni(OH)2/MnO2@CNT//APDC asymmetric
device delivered both high gravimetric and volumetric energy density
(126.4 Wh kg–1 and 10.9 mWh cm–3, respectively), together with superb rate performance and cycling
lifetime. Moreover, we demonstrate an effective approach for building
a high-performance supercapacitor with high gravimetric/volumetric
energy density.
%I ACS Publications