Analisis Pengaruh Penambahan Multi-Walled Carbon Nanotube pada Spesifik Kapasitansi Lapisan Hidroksida Ganda Nikel Kobalt untuk Aplikasi Elektroda Superkapasitor

Abstract

Nickel-cobalt layered double hydroxide (Ni-Co-LDH) has emerged as a promising material for supercapacitors as its unique spatial structure and good electrochemical activity make it an attractive candidate. However, low electrical conductivity remains a challenge, resulting in a suboptimized capacitance. Here in, Ni-Co LDH/MWCNT composites were synthesized with varying concentrations of multi- walled carbon nanotubes (MWCNTs) at 0; 0,05; 0,075; 0,1; 0,3; dan 0,5 g using a one-step solvothermal method. The results show that Ni-Co LDH micro flowers' morphology composed of nanosheet, while the presence of MWCNTs in the LDH matrix appears as an interconnected tubular structure. The interconnection of these nanosheets with the tubular structure enhances porosity, resulting in a higher specific surface area. The composite with 0,3 g MWCNT exhibits the highest specific capacitance of 24.8 F/g at 0.5 A/g and good energy density of 4.17 Wh kg-1 at the power density of 275.35 W kg-1. In conclusion, this study demonstrates that the incorporation of MWCNTs could enhance specific capacitance of Ni-Co LDH materials, that could be anticipated to be used as electrode materials for supercapacitors.