TY - JOUR
T1 - Photothermic Energy Harvesting in Reduced Graphene Oxide Nanosheets Intercalated with Vanadium Nitride as Pseudocapacitive Electrode
AU - Ramakrishnan, Kiruthiga
AU - Surabhi, Srivathsava
AU - Rednam, Udayabhaskar
AU - Jeong, Jong Ryul
AU - Jeyalakshmi, Kumaramangalam
AU - Girish, Santhosh
AU - Morales, Daniela V.
AU - Ramalinga Viswanathan, Mangalaraja
AU - Karvembu, Ramasamy
N1 - Publisher Copyright:
© 2024 American Chemical Society
PY - 2024/6/28
Y1 - 2024/6/28
N2 - The photothermal energy conversion mechanism in pseudocapacitive nanoelectrodes endures temperature-enervated power dissipation due to self-heating, leading to rapid heating and cooling cycles during the redox reactions triggered by plasmonic excitation. Herein, we report on vanadium nitride (VN)-intercalated reduced graphene oxide (RGO) nanosheets (VN@RGO) as a photoresponsive pseudocapacitive electrode material. Finite-difference time-domain (FDTD) simulations were used to analyze the photothermal-driven localized self-heating considering the complex dielectric properties of VN@RGO. The effect of morphology and stoichiometry on the polarization-induced electric field intensity (|E|2), power absorption (Pabs), and current density (J) of the VN@RGO system has been systematically explored. Both the simulation and experimental results complement each other. This study delineates electrically coupled thermal attenuation in VN@RGO, overcoming the limitations related to potential modulation of the electrode material. VN@RGO exhibits excellent electrochemical performance in the half-cell and full-cell modes of a symmetric supercapacitor, achieving maximum specific capacitances of 276 and 56 F g-1 at a current density of 0.1 A g-1, respectively.
AB - The photothermal energy conversion mechanism in pseudocapacitive nanoelectrodes endures temperature-enervated power dissipation due to self-heating, leading to rapid heating and cooling cycles during the redox reactions triggered by plasmonic excitation. Herein, we report on vanadium nitride (VN)-intercalated reduced graphene oxide (RGO) nanosheets (VN@RGO) as a photoresponsive pseudocapacitive electrode material. Finite-difference time-domain (FDTD) simulations were used to analyze the photothermal-driven localized self-heating considering the complex dielectric properties of VN@RGO. The effect of morphology and stoichiometry on the polarization-induced electric field intensity (|E|2), power absorption (Pabs), and current density (J) of the VN@RGO system has been systematically explored. Both the simulation and experimental results complement each other. This study delineates electrically coupled thermal attenuation in VN@RGO, overcoming the limitations related to potential modulation of the electrode material. VN@RGO exhibits excellent electrochemical performance in the half-cell and full-cell modes of a symmetric supercapacitor, achieving maximum specific capacitances of 276 and 56 F g-1 at a current density of 0.1 A g-1, respectively.
KW - FDTD simulations
KW - photothermal power absorption
KW - pseudocapacitive electrode
KW - reduced graphene oxide
KW - transition metal nitrides
UR - http://www.scopus.com/inward/record.url?scp=85196064144&partnerID=8YFLogxK
U2 - 10.1021/acsanm.4c01118
DO - 10.1021/acsanm.4c01118
M3 - Article
AN - SCOPUS:85196064144
SN - 2574-0970
VL - 7
SP - 14016
EP - 14028
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 12
ER -