TY - JOUR
T1 - Enabling redox chemistry with hierarchically designed bilayered nanoarchitectures for pouch-type hybrid supercapacitors
T2 - A sunlight-driven rechargeable energy storage system to portable electronics
AU - Nagaraju, Goli
AU - Sekhar, S. Chandra
AU - Ramulu, Bhimanaboina
AU - Bharat, L. Krishna
AU - Raju, G. Seeta Rama
AU - Han, Young Kyu
AU - Yu, Jae Su
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/8
Y1 - 2018/8
N2 - An essential key to enhance the redox chemistry of battery-type materials is to construct rational design of nanoarchitectures with high electrochemical activity. Herein, we reported a hierarchical composite consisting of bilayered nickel hydroxide carbonate nanoplates-decorated nanoflowers on nickel foam (NHC NPs@NFs/Ni foam) via a facile homogeneous precipitation method for use as an effective cathode in hybrid supercapacitors (HSCs). Under controlled growth time (4 h), the bilayered NHC NPs@NFs with hierarchical alignment were spontaneously crystallized on Ni foam. The as-preapared hybrid structure greatly enhanced the electroactive surface area and enabled the rapid redox chemistry in alkaline electrolyte. Notably, the hybrid NHC NPs@NFs/Ni foam delivered a maximum areal capacity of 727.4 μAh/cm2 at 2 mA/cm2 and it is relatively higher than its oxide form (76.6 μAh/cm2) in a three-electrode system. Also, a pouch-type HSC with bilayered NHC NPs@NFs/Ni foam and porous carbon electrodes was fabricated, which demonstrated superior energy storage performance in terms of capacitance (1445.8 mF/cm2), energy density (0.506 mWh/cm2), power density (35.675 mW/cm2) and cycling stability (89.4%). Furthermore, the self-charging power station consisting of a solar cell for energy conversion and the HSCs for energy storage was also assembled to operate the portable electronic displays and wall clock effectively for long time. This facile approach for the cost-effective fabrication of hierarchically designed nanomaterials paves a path for the development of high-performance hybrid supercapacitors.
AB - An essential key to enhance the redox chemistry of battery-type materials is to construct rational design of nanoarchitectures with high electrochemical activity. Herein, we reported a hierarchical composite consisting of bilayered nickel hydroxide carbonate nanoplates-decorated nanoflowers on nickel foam (NHC NPs@NFs/Ni foam) via a facile homogeneous precipitation method for use as an effective cathode in hybrid supercapacitors (HSCs). Under controlled growth time (4 h), the bilayered NHC NPs@NFs with hierarchical alignment were spontaneously crystallized on Ni foam. The as-preapared hybrid structure greatly enhanced the electroactive surface area and enabled the rapid redox chemistry in alkaline electrolyte. Notably, the hybrid NHC NPs@NFs/Ni foam delivered a maximum areal capacity of 727.4 μAh/cm2 at 2 mA/cm2 and it is relatively higher than its oxide form (76.6 μAh/cm2) in a three-electrode system. Also, a pouch-type HSC with bilayered NHC NPs@NFs/Ni foam and porous carbon electrodes was fabricated, which demonstrated superior energy storage performance in terms of capacitance (1445.8 mF/cm2), energy density (0.506 mWh/cm2), power density (35.675 mW/cm2) and cycling stability (89.4%). Furthermore, the self-charging power station consisting of a solar cell for energy conversion and the HSCs for energy storage was also assembled to operate the portable electronic displays and wall clock effectively for long time. This facile approach for the cost-effective fabrication of hierarchically designed nanomaterials paves a path for the development of high-performance hybrid supercapacitors.
KW - Areal capacity
KW - Bilayered nanoarchitectures
KW - Energy density
KW - Hybrid supercapacitor
KW - Redox chemistry
KW - Self-charging station
UR - http://www.scopus.com/inward/record.url?scp=85047804472&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2018.05.063
DO - 10.1016/j.nanoen.2018.05.063
M3 - Article
AN - SCOPUS:85047804472
SN - 2211-2855
VL - 50
SP - 448
EP - 461
JO - Nano Energy
JF - Nano Energy
ER -
