TY - JOUR
T1 - A 2.0 V capacitive device derived from shape-preserved metal nitride nanorods
AU - Zhu, Changrong
AU - Sun, Yanfeng
AU - Chao, Dongliang
AU - Wang, Xinghui
AU - Yang, Peihua
AU - Zhang, Xiao
AU - Huang, Hui
AU - Zhang, Hua
AU - Fan, Hong Jin
N1 - Funding Information:
H.J. Fan acknowledge the financial supported by MOE AcRF Tier 1 (RG104/14, RG98/15) and CAS/SAFEA International Partnership Program for Creative Research Teams . H. Zhang acknowledges the support from MOE under AcRF Tier 2 (ARC 26/13, No. MOE2013-T2–1-034 ; ARC 19/15, No. MOE2014-T2–2-093 ) and AcRF Tier 1 (RGT18/13, RG5/13), and NTU under Start-Up Grant ( M4081296.070.500000 ) in Singapore. This Research is also conducted by NTU-HUJ-BGU Nanomaterials for Energy and Water Management Programme under the Campus for Research Excellence and Technological Enterprise (CREATE), that is supported by the National Research Foundation, Prime Minister's Office, Singapore .
Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - A high working voltage and fast charging/discharging capability are important to a supercapacitor device in order to achieve decent energy densities with high power. In this work, we report 2.0 V quasi-solid-state symmetric capacitive device based on Fe2N-Ti2N (FTN) core-shell nanorod array electrodes. Through a surface protection by a thin and ultra-stable Ti2N shell, Fe2N converted from its oxyhydroxide precursor inhibits the original nanorod structure. Due to advantageous features of these core-shell metal nitride electrodes (e.g., high conductivity, structure stability, direct current path), the symmetric device permits ultrahigh scan rates (up to 50 V s-1) and delivers fairly stable capacitance in long-term cycles (~82 F g-1 with ~99% capacitance retention in 20,000 cycles). As a result, the supercapacitor exhibits an impressive energy density of ~48.5 W h kg-1 at the power of 2700 W kg-1. These results demonstrate the potentialities of metal nitride nanorods array for high energy density capacitive device.
AB - A high working voltage and fast charging/discharging capability are important to a supercapacitor device in order to achieve decent energy densities with high power. In this work, we report 2.0 V quasi-solid-state symmetric capacitive device based on Fe2N-Ti2N (FTN) core-shell nanorod array electrodes. Through a surface protection by a thin and ultra-stable Ti2N shell, Fe2N converted from its oxyhydroxide precursor inhibits the original nanorod structure. Due to advantageous features of these core-shell metal nitride electrodes (e.g., high conductivity, structure stability, direct current path), the symmetric device permits ultrahigh scan rates (up to 50 V s-1) and delivers fairly stable capacitance in long-term cycles (~82 F g-1 with ~99% capacitance retention in 20,000 cycles). As a result, the supercapacitor exhibits an impressive energy density of ~48.5 W h kg-1 at the power of 2700 W kg-1. These results demonstrate the potentialities of metal nitride nanorods array for high energy density capacitive device.
KW - Atomic layer deposition
KW - Electrochemical capacitor
KW - High working voltage
KW - Metal nitride
KW - Symmetric supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=84966372734&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2016.04.056
DO - 10.1016/j.nanoen.2016.04.056
M3 - Journal article
AN - SCOPUS:84966372734
SN - 2211-2855
VL - 26
SP - 1
EP - 6
JO - Nano Energy
JF - Nano Energy
ER -
