TY  - EJOU
AU  - Ralph, N. G. Basil 
AU  - Soundare, S. Shanmugha 
AU  - Yamuna, D. 
AU  - Ariponnammal, S. 

TI  - Electrochemical analysis on SnSeO<sub>3</sub>/ZnSeO<sub>3</sub> nanocomposite
T2  - Chalcogenide Letters

PY  - 2024
VL  - 21
IS  - 9
SN  - 1584-8663

AB  - Nanocomposite SnSeO<sub>3</sub>/ZnSeO<sub>3</sub> has been synthesized by hydrothermal method. X-ray 
powder diffraction confirms formation of SnSeO<sub>3</sub>/ZnSeO<sub>3</sub> nanocomposite. It exhibits an 
interesting morphology of needle like nanorod structure. Thermal analysis reveals the 
thermal stability, decomposition behavior and critical temperatures where significant weight 
loss occurs. X-ray photoemission explains the role of the chemical state Sn, Zn, Se and O in 
SnSeO<sub>3</sub>/ZnSeO<sub>3</sub>. Electrochemical study has been made in both three electrode and two 
electrode system. In three electrode system, cyclic voltammetry exhibits a bell-shaped curve 
and the operational potential window is 0.8 V. The specific capacitance is 78.65 F/g for 5 
mV scan rate. Chronopotentiometry shows quasi-triangular curves demonstrating the 
behavior of pseudo capacitors. Specific capacitances of 72.02 F/g was delivered at 1 A/g 
current density in 3M electrolyte of KOH. The plot of Nyquist for SnSeO<sub>3</sub>/ZnSeO<sub>3</sub> confirms 
pseudo capacitor behavior. The series resistance Rs is low that is 0.78 Ω and charge transfer 
resistance is 0.42 Ω. Symmetric SnSeO<sub>3</sub>/ZnSeO<sub>3</sub> supercapacitor device that is, two electrode 
system, is fabricated using 3M KOH electrolyte. Operational potential window is 1.5V. 
Cyclic voltammetry curves of the device show excellent capacitive behavior. The symmetric 
device produced specific capacitances of 39.37F/g, energy density 6.15 Wh kg<sup>-1</sup>
 and power 
density 374.99 
kW kg<sup>-1</sup>
 at 1Ag<sup>-1</sup> 
current density. The cell displayed 73.18% capacity 
retention, indicating excellent electrode stability for approximately 5000 cycles at a current 
density of 1 Ag<sup>-1</sup>
. Nyquist plot suggests that the system is stable and exhibits capacitive 
behavior. 
KW  - SnSeO<sub>3</sub>/ZnSeO<sub>3</sub>
KW  -  Nanocomposite
KW  -  Thermal
KW  -  X-ray photoemission
KW  -   Electrochemical studies

DO  - 10.15251/CL.2024.219.729