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작성일 : 17-10-16 20:41
Flexible Pouch-type Hybrid Supercapacitor_JMC_A
 글쓴이 : supervisor
조회 : 640  
   2017_Ganesh_JMCA2.pdf (3.2M) [0] DATE : 2017-10-16 20:41:21
20170614  Journal of Materials Chemistry A, 2017, 5(22), 11100 - 11113.

  Liquid electrolyte mediated flexible pouch-type hybrid supercapacitor based on binderless core–shell nanostructures assembled with honeycomblike porous carbon†
Ganesh Kumar Veerasubramani, ab Arunkumar Chandrasekhar, a, Sudhakaran M. S. P., c Young Sun Mok c and Sang Jae Kim *a

The current challenges in the usage of liquid electrolyte in energy storage devices are closely correlated
with the flexibility and portability of the devices. In this paper, a highly flexible, pouch-type hybrid
supercapacitor in liquid electrolyte based on a binderless cobalt hydroxide–cobalt molybdate
(CoMoO4@Co(OH)2) core–shell structure (prepared by electrochemical deposition; ECD) sandwiched
with honeycomb-like porous carbon derived from laboratory waste tissue paper (prepared by
a hydrothermal reaction and carbonization) is presented. Its excellent hierarchical core–shell structure
and honeycomb-like porous carbon results in a large electrochemically active surface area, which yields
a high areal capacity of 265 mA h cm2 and excellent specific capacitance of 227 F g1 in liquid
potassium hydroxide (KOH) electrolyte with excellent cyclic stability. An assembled pouch-type hybrid
supercapacitor using the prepared core–shell structure as the positive electrode and porous carbon as
the negative electrode shows an extended working voltage of 1.5 V in 2 M KOH electrolyte, which stores
a maximum energy density of 167.5 mW h cm2. Interestingly, the fabricated pouch-type supercapacitor
shows an excellent flexibility under different bending conditions and exhibits remarkable cyclic stability
with >98% capacitance retention even after long cycles. Furthermore, the capability of the device is
demonstrated by integrating it with a solar cell to drive the various types of light-emitting diodes (LEDs)
and seven segment displays for self-powered applications.