A high performance hybrid capacitor with Li2CoPO4F cathode and activated carbon anode

Title
A high performance hybrid capacitor with Li2CoPO4F cathode and activated carbon anode
Authors
K. KarthikeyanS. AmareshK. J. KimS. H. Kim정경윤조병원이윤성
Keywords
Li2CoPO4F; hybrid capacitor
Issue Date
2013-07
Publisher
Nanoscale
Citation
VOL 5, NO 13, 5958-5964
Abstract
For the first time, we report the possibility of utilizing Li2CoPO4F as a novel cathode material for hybrid capacitor applications. Li2CoPO4F powders were prepared by a conventional two-step solid state method. A hybrid cell was fabricated using Li2CoPO4F as the cathode along with activated carbon (AC) as the anode in 1 M LiPF6 dissolved in 1:1 EC/DMC electrolyte and its electrochemical properties were examined by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and constant current charge–discharge (C–D) techniques. The Li2CoPO4F/AC cell is capable of delivering a discharge capacitance of 42 F g−1 at 150 mA g−1 current density within 0–3 V region having excellent coulombic efficiency of over 99% even after 1000 cycles. Furthermore, the Li2CoPO4F/AC cell exhibited excellent rate performance with an energy density of ~24 W h kg−1 at 1100 mA g−1 current and maintained about 92% of its initial value even after 30000 C–D cycles. Electrochemical impedance spectroscopy was conducted to corroborate the results that were obtained and described.
URI
http://pubs.kist.re.kr/handle/201004/45045
ISSN
20403364
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE