TY - JOUR
T1 - In-situ thermal reduction synthesis of porous carbon nitride doped gadolinium sulfide nanocomposite
T2 - An emerging electrode material for high-performance supercapacitor
AU - Sathish Kumar, Ponnaiah
AU - Min, Yuho
AU - Hyun, Dong Choon
AU - Choi, Ji Hyuk
AU - Lee, Sungwon
N1 - Publisher Copyright:
© 2023
PY - 2023/12/25
Y1 - 2023/12/25
N2 - The multiple-step synthesis, harmful organic solvents, and hazardous binders are the major obstacles for supercapacitor (SC) designers. A conventional synthesis of nanocomposite is normally involves complex steps and time-consuming. To reduce these multiple steps and process time, we report carbon nitride-doped gadolinium sulfide (CN/Gd2S3) nanocomposite obtained via a one-step in situ thermal reduction method. In our study, we introduce poly(3,4-ethylenedioxythiophenes): polystyrene sulfonate (PEDOT–PSS) to act as a dual role of binder and conducting additive, and we use DI water as the solvent for the SC electrode. Despite the reduced fabrication steps, our electrode exhibits an extraordinary specific capacity value of 1831 F g−1 at 1 A g−1 in an aqueous 2 M KOH electrolyte, as well as 98.5 % retention after 5000 cycles. Moreover, a solid-state asymmetric SC (ASC) was further made up with activated carbon (AC) as a negative electrode and CN/Gd2S3 as a positive electrode, providing a high energy density of 70.95 W h kg−1 at a specific power density of 250 W kg−1 at 1 A g−1. The remarkable specific capacitance retention of the ASC could maintain 86.8 % after 5000 cycles, indicating the potential application of CN/Gd2S3 electrode material for energy storage devices. This device (CN/Gd2S3//AC) showcased its practical application by powering twenty-six light-emitting diodes (LEDs) (each of 2.7 V) and appeared as an attractive energy storage unit for portable devices.
AB - The multiple-step synthesis, harmful organic solvents, and hazardous binders are the major obstacles for supercapacitor (SC) designers. A conventional synthesis of nanocomposite is normally involves complex steps and time-consuming. To reduce these multiple steps and process time, we report carbon nitride-doped gadolinium sulfide (CN/Gd2S3) nanocomposite obtained via a one-step in situ thermal reduction method. In our study, we introduce poly(3,4-ethylenedioxythiophenes): polystyrene sulfonate (PEDOT–PSS) to act as a dual role of binder and conducting additive, and we use DI water as the solvent for the SC electrode. Despite the reduced fabrication steps, our electrode exhibits an extraordinary specific capacity value of 1831 F g−1 at 1 A g−1 in an aqueous 2 M KOH electrolyte, as well as 98.5 % retention after 5000 cycles. Moreover, a solid-state asymmetric SC (ASC) was further made up with activated carbon (AC) as a negative electrode and CN/Gd2S3 as a positive electrode, providing a high energy density of 70.95 W h kg−1 at a specific power density of 250 W kg−1 at 1 A g−1. The remarkable specific capacitance retention of the ASC could maintain 86.8 % after 5000 cycles, indicating the potential application of CN/Gd2S3 electrode material for energy storage devices. This device (CN/Gd2S3//AC) showcased its practical application by powering twenty-six light-emitting diodes (LEDs) (each of 2.7 V) and appeared as an attractive energy storage unit for portable devices.
KW - CN/GdS nanocomposite
KW - Cycling stability
KW - Electrochemical properties
KW - Energy storage
KW - Porous electrode
UR - http://www.scopus.com/inward/record.url?scp=85175047738&partnerID=8YFLogxK
U2 - 10.1016/j.est.2023.109385
DO - 10.1016/j.est.2023.109385
M3 - Article
AN - SCOPUS:85175047738
SN - 2352-152X
VL - 74
JO - Journal of Energy Storage
JF - Journal of Energy Storage
M1 - 109385
ER -