Supercapacitor performance of a nanocomposite of dilithium and β-NiS

被引:0
|
作者
Raghavan, C. [1 ]
Muralidharan, G. [1 ]
机构
[1] Gandhigram Rural Inst, Dept Phys, Gandhigram 624302, India
关键词
Binary nanocomposites; Hydrothermal technique; Supercapacitors; Symmetric device; KOH electrolyte; BATTERY-TYPE ELECTRODE; HYDROTHERMAL SYNTHESIS; NICKEL SULFIDE; SOLVOTHERMAL SYNTHESIS; MESOPOROUS SHELLS; ENERGY-CONVERSION; THIN-FILMS; FABRICATION; NANOSTRUCTURES; COMPOSITE;
D O I
10.1007/s11581-024-05630-1
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this report, binary nanocomposite of Li2-incorporated beta-NiS has been successfully synthesized via the hydrothermal technique. The formation of Li2 and rhombohedral beta-NiS nanocomposite, spongy layered flakes morphology, and elemental analysis was characterised by performing XRD, SEM, and energy-dispersive X-ray analysis, respectively. The charge storage capability of the Li2: beta-NiS nanocomposite was examined in the three-electrode configuration. The voltammetric curve from cyclic voltammetry and charge-discharge plateaus from Galvanostatic charge/discharge measurements shows the Li2: beta-NiS exhibits pseudocapacitive behaviour. The Li2: beta-NiS electrode delivers exceptional specific capacitance of 800 F g-1 at 10 mV s-1 and remarkable cyclic stability of 90% after 3000 continuous charge-discharge cycles at 10 mA cm-2. In addition, a symmetric device has been assembled with Li2: beta-NiS nanocomposite electrode. The performance of a symmetric device has been studied in a window of 1 V with a lower end at 0.5 V. (0.5 to 1.5 V). It is examined that the device exhibits good energy density and power density of 12 Wh Kg-1 and 500 W Kg-1, respectively. The symmetric device could yield 94% capacity retention after 5000 continuous charge-discharge cycles at a current density of 15 mA cm-2. From this report, the electrochemical performance of Li2: beta-NiS electrode suggests it can be a promising electrode for high-performance supercapacitors.
引用
收藏
页码:5023 / 5036
页数:14
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