TY  - JOUR
Y1  - 2017///
VL  - 121
A1  - Harilal, M.
A1  - Krishnan, S.G.
A1  - Yar, A.
A1  - Misnon, I.I.
A1  - Reddy, M.V.
A1  - Yusoff, M.M.
A1  - Dennis, J.O.
A1  - Jose, R.
JF  - Journal of Physical Chemistry C
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032893914&doi=10.1021%2facs.jpcc.7b06630&partnerID=40&md5=8673628f1dc7d96d92bee50f25aa0f59
ID  - scholars8304
KW  - Activated carbon; Capacitance; Cobalt compounds; Electric batteries; Electrodes; Electrolytes; Manganese oxide; Nanowires; Potassium hydroxide; Supercapacitor
KW  -  Asymmetric supercapacitor; Commercial activated carbons; Conventional batteries; High electrical conductivity; Structure property relationships; Supercapacitor electrodes; Volumetric energy densities; Volumetric power density
KW  -  Electrolytic capacitors
N2  - A new pseudocapacitive combination, viz. CoO-MnO2-MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical conductivity and specific capacitance (Cs) (1650 F g-1 or 184 mA h g-1 at 1 A g-1) with high capacity retention, whereas MnCo2O4 nanoflower electrode showed only one-third conductivity and one-half of its capacitance (872 F g-1 or 96 mA h g-1 at 1 A g-1) when used as a supercapacitor electrode in 6 M KOH electrolyte. The structure-property relationship of the materials is deeply investigated and reported herein. Using the HNWs as a pseudocapacitive electrode and commercial activated carbon as a supercapacitive electrode we achieved battery-like specific energy (Es) and supercapacitor-like specific power (Ps) in aqueous alkaline asymmetric supercapacitors (ASCs). The HNWs ASCs have shown high Es (90 Wh kg- ) (volumetric energy density Ev 0.52 Wh cm- ) with Ps up to ~104 W kg-1 (volumetric power density Pv 5 W cm-3) in 6 M KOH electrolyte, allowing the device to store an order of magnitude more energy than conventional supercapacitors. © 2017 American Chemical Society.
IS  - 39
PB  - American Chemical Society
SN  - 19327447
EP  - 21183
AV  - none
TI  - Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes
SP  - 21171
N1  - cited By 68
ER  -