Shape Effect on Electrochemical Energy Storage Performance of Nanosized Copper Germanium Selenide Particles

• Published in: Bulletin of the Korean Chemical Society Vol. 42; no. 4; pp. 641 - 644
• Main Authors: Ganesan, Vinoth, Kim, Jinkwon
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley‐VCH Verlag GmbH & Co. KGaA 01.04.2021; 대한화학회
• Subjects: Chalcogenides; Copper germanium selenide; Nanosheets; Supercapacitance; 화학
• ISSN: 1229-5949; 0253-2964; 1229-5949
• DOI: 10.1002/bkcs.12249

Colloidal Cu2GeSe3 nanosheets (NSs) (0.5–1.5 μm) and Cu2GeSe3 nanoparticles (NPs) (8–10 nm) were synthesized for electrochemical performance comparison. The galvanostatic measurements show the maximum capacitance of 118 F/g and 77 F/g for Cu2GeSe3 NSs and NPs, respectively. Each type of nanomaterials exhibits shape dependence in its capacitance reduction behavior with increasing current density due to differences in surface area and electrical conductivity. The cyclic stability tests for Cu2GeSe3 NSs showed a capacity retention of about 90% after 1000 cycles. Nanosized copper germanium selenide particles were tested as supercapacitor electrode. Each type of nanomaterials exhibits shape dependence in its capacitance reduction behavior with increasing current density due to differences in surface area and electrical conductivity.