Mo-doped ZnO nanoflakes on Ni-foam for asymmetric supercapacitor applications

Awais Ali; Muhammad Ammar; Muddassir Ali; Zaid Yahya; Muhammad Yasar Javaid; Sadaf Ul Hassan; Toheed Ahmed

doi:10.1039/c9ra05051e

Mo-doped ZnO nanoflakes on Ni-foam for asymmetric supercapacitor applications

RSC Adv. 2019 Sep 2;9(47):27432-27438. doi: 10.1039/c9ra05051e. eCollection 2019 Aug 29.

Authors

Awais Ali¹, Muhammad Ammar^{1

2}, Muddassir Ali³, Zaid Yahya¹, Muhammad Yasar Javaid⁴, Sadaf Ul Hassan⁵, Toheed Ahmed^{2

6}

Affiliations

¹ Department of Chemical Engineering Technology, Government College University Faisalabad 38000 Pakistan mammar@gcuf.edu.pk.
² University of Chinese Academy of Sciences Beijing 100049 China.
³ Department of Energy Engineering, Faculty of Mechanical and Aeronautical Engineering, University of Engineering and Technology Taxila 47080 Pakistan.
⁴ Department of Mechanical Engineering Technology, Government College University Faisalabad 38000 Pakistan.
⁵ Department of Chemistry, COMSATS University Islamabad Lahore Campus 45550 Pakistan.
⁶ Department of Applied Chemistry, Government College University Faisalabad 38000 Pakistan.

Abstract

A single-step hydrothermal route for synthesizing molybdenum doped zinc oxide nanoflakes was employed to accomplish superior electrochemical characteristics, such as a specific capacitance of 2296 F g^-1 at current density of 1 A g^-1 and negligible loss in specific capacitance of 0.01025 F g^-1 after each charge-discharge cycle (up to 8000 cycles). An assembled asymmetric supercapacitor (Mo:ZnO@NF//AC@NF) also exhibited a maximum energy density and power density of 39.06 W h/kg and 7425 W kg^-1, respectively. Furthermore, it demonstrated a specific capacitance of 123 F g^-1 at 1 A g^-1 and retained about 75.6% of its initial capacitance after 8000 cycles. These superior electrochemical characteristics indicate the potential of this supercapacitor for next-generation energy storage devices.