Thermal stability on solid state symmetric supercapacitors with hydrothermally synthesized Cu2CoSnS4 electrodes

• Published in: Materials letters Vol. 352; p. 135142
• Main Authors: Krishnaiah, Mokurala, Patil, Teja M., Kumar, Ajit, Song, Junyoung, Hun Jin, Sung
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2023
• Subjects: Morphology; Supercapacitors; Temperature-dependent supercapacitors performance; Tri-metallic sulfide Cu2CoSnS4; Tri-metallic sulfide Cu2CoSnS4; Supercapacitors; Morphology; Temperature-dependent supercapacitors performance
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2023.135142

The electrochemical characteristics of CCTS-9 electrodes are based on symmetric solid-state supercapacitors (SSCs) and their thermal stability. Practical demonstration of CCTS electrode-based series connected SSCs glow RED LED for 6 min. [Display omitted] •Thiourea concentration affects the physical characteristics of CCTS particles.•Layered morphology with Cu-rich composition CCTS electrode exhibited maximum Cp in 3T.•SSCs are operationally working conditions up to 60℃.•The maximum E=(89.55 ± 10.35)Whkg−1, P=(800 ± 40.32)Wkg−1 for series connected two SSCs.•CCTS electrodes-based series connected SSCs glow RED LED for 6 min. The effects of thiourea concentration on crystal phase, morphology, and the elemental composition and electrochemical characteristics (ECs) of hydrothermally synthesized Cu2CoSnS4 (CCTS) electrodes are systematically studied. In a three-terminal (3T) configuration, layered structure morphology with Cu-rich chemical composition-based electrodes exhibits higher ECs than other electrodes. The thermal reliability of devices up to 60℃ is practically validated via temperature-dependent cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) measurements for single symmetric solid-state supercapacitor (SSC) devices. The maximum of Cp=(251.87 ± 30.56)Fg−1, E=(89.55 ± 10.35)Whkg−1, P=(800 ± 40.32)Wkg−1 and voltage window expanded up to 1.6 V including red LED operation for 6 min are achieved for the serially connected two SSCs at 1Ag−1, indicating that CCTS can be one promising electrode material for SSCs.