Abstract
In recent years, the search for efficient electrode materials for supercapacitors has focused on improving operating voltage thereby specific energy. This study explores NiCoAl layered double hydroxides (LDHs) as electrode materials, synthesized with varying Ni ratios (x = 0.25, 0.5, 0.75) through a hydrothermal method. The NCAL13 variant demonstrated superior electrochemical performance, achieving a specific capacitance of 1413F/g and retaining 77 % capacitance after 5000 cycles. An asymmetric cell using NCAL13 and activated carbon delivered 150F/g and an energy density of 50.1 Wh/kg, retaining 86 % capacitance after 10,000 cycles, highlighting its potential for supercapacitor applications.
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