دورية
Fabrication of 2D layered structure of rGO@Bi2O2CO3@NiCo-LDHs composite electrode for aqueous asymmetric supercapacitor
| العنوان: | Fabrication of 2D layered structure of rGO@Bi2O2CO3@NiCo-LDHs composite electrode for aqueous asymmetric supercapacitor |
|---|---|
| المؤلفون: | Yang, Zhi-Guang, Liu, Shu-Jing, Zheng, Jing-Jing, Wang, Luo-Xi, Xiao, Li-Na, Li, Zhen-Dong, Zhang, Xiao-Bin, Hou, Zhi-Qiang |
| المصدر: | Chemical Papers; January 2022, Vol. 76 Issue: 1 p277-286, 10p |
| مستخلص: | Two-dimensional layered structure of rGO@Bi2O2CO3@NiCo-LDHs as positive material of supercapacitor is fabricated using the simple hydrothermal reaction, freeze-drying technology, and heat treatment process. The corresponding electrode exhibits a maximum specific capacity of 1147 F/g at 0.5 A/g and 82.2% capacity retention after 1000 times charging and discharging at 10 A/g. Additionally, negative material of rGO film is also prepared, which has a higher specific capacity of 354 F/g than that of other carbon materials. To obtain a high performance of supercapacitor device, an asymmetric supercapacitor of rGO//rGO@Bi2O2CO3@NiCo-LDHs is assembled based on rGO@Bi2O2CO3@NiCo-LDHs, rGO film, and 2 M KOH electrolyte. The testing data show that the maximum specific capacitance and energy density of asymmetric supercapacitor are 85 F/g and 23.14 Wh/kg, respectively. Simultaneously, it also shows the good electrochemical stability, remaining 80% capacity after 3000 cycles. This means that rGO@Bi2O2CO3@NiCo-LDHs could be regarded as a promising electrode material for energy storage devices. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 25857290 13369075 |
|---|---|
| DOI: | 10.1007/s11696-021-01861-y |