期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 166, 期 2, 页码 A217-A224出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0631902jes
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资金
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2017R1A2B4011998, 2018R1A6A1A03025708]
ZnCo2O4 (ZCO) hexagonal nanoplates were synthesized by a facile, robust and cost-effective co-precipitation method. The as-synthesized nanoplates were utilized as an electrode material and their electrochemical properties were investigated in three-electrode and two-electrode configurations with aqueous electrolyte of 1 M KOH. The fabricated ZCO electrode materials exhibited a specific capacity of 37 mAh g(-1) at 1 A g(-1). The capacity of the pristine ZCO nanoplates was further improved by incorporating multiwall carbon nanotubes (MWCNTs). The MWCNT@ZCO showed a specific capacity of 64 mAh g(-1) at 1 A g(-1). To examine practical performances, asymmetric supercapacitor (ASC) was also fabricated using MWCNT@ZCO as a positive electrode and activated carbon as a negative electrode. The specific capacity of the ASC was found to be 17 mAh g(-1) at 0.38 A g(-1). ASC could store sufficient energy to power a parallel combination of two red color light-emitting diodes. These findings may open new opportunities for the design of effective, stable, and easily recyclable ZCO electrode material for energy storage devices. (C) 2019 The Electrochemical Society.
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