Basic charge storage mechanism of cobalt sulfide electrode material for supercapacitor

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

IRANCC20_700

تاریخ نمایه سازی: 28 اردیبهشت 1398

Abstract:

Recently, since supercapacitors have received considerable attention, a large number of studies have been developed to create efficient electrodes to respond to ever-increasing demands of supercapacitors. The boundary between the electrochemical capacitors and batteries is less pronounced. The similar material may exhibit capacitor battery-like behavior depending on the charge storage guest ions and the electrode design. In this work a system containing cobalt sulfide (CoS) electrodes and KOH (6 Molar) as electrolyte, has been studied to check its ability as supercapacitor or battery. The amount of b-value can be used to prepare guidance for the practical design of high-performance electrode materials. In this report, the calculated b-value for cobalt sulfide electrode is closer to 1 in a very wide range of sweep rate (Fig.1). Therefore, the charge storage mechanism in these studied electrodes is capacitive rather than battery-type materials Details of this procedure along with the obtained values are illustrated in Figure 1. It can be seen that the calculated b-value is closer to 1 in a very wide range of sweep rate (from 5 to 50 mV s-1), charge storage mechanism in these studied electrodes is capacitive rather than intercalation/de-intercalation (battery-type).

Authors

Fereshteh Saleki

Petroleum and Chemical Engineering College, Shiraz University, Shiraz, Iran

Marzie dehghanifard

Petroleum and Chemical Engineering College, Shiraz University, Shiraz, Iran

Niyousha chabi

Petroleum and Chemical Engineering College, Shiraz University, Shiraz, Iran

Peyman Keshavarz

Petroleum and Chemical Engineering College, Shiraz University, Shiraz, Iran