Shiva Moraveji - Department of Analytical Chemistry, Faculty of Chemistry, Alzahra University, Tehran, Iran
Lida Fotouhi - Department of Analytical Chemistry, Faculty of Chemistry, Alzahra University, Tehran, Iran.Analytical and Bioanalytical Research Centre (ABRC), Alzahra University, Tehran, Iran
Saeed Shahrokhian - Department of Chemistry, Sharif University of Technology, Tehran ۱۱۱۵۵–۹۵۱۶, Iran
Mohammad Zirak - Department of Physics, Hakim Sabzevari University, P. O. Box ۹۶۱۷۹۷۶۴۸۷, Sabzevar, Iran

In recent decades, the fossil fuels have engendered climate changes and environmentalpollution. Energy conversion and storage devices with low cost, high-efficiency and environmentfriendlyreplaced the immoderate traditional energy [۱,۲]. Additionally, metal chalcogenide havebeen used as an electrode materials for supercapacitor applications[۳]. Zinc cobalttelluride@nickel cobalt selenide were prepared by two step hydrothermal and electrodepositionmethod. Zinc cobalt telluride@nickel cobalt selenide electrode achieved highest specificcapacitance of ۸۰۰ F g-۱ at ۲ A g-۱ current density. As fabricated electrode exhibited the retentionof ۹۳.۵% after ۵۰۰۰ GCD cycles, confirmed the good stability and reversibility. An asymmetricdevice showed a high energy (۵۵ W h kg−۱) and power density (۵۶۰ W kg−۱)

asymmetric supercapacitor, metal chalcogenide