Abstract
The exploration of new high-performance, low-cost, and eco-friendly electrode materials is crucial for improving electrochemical performance. In this research, a three-dimensional interconnected porous composite electrode is synthesized, comprising bimetallic oxide of CoFe2O4 and Co3Fe7 alloy with porous carbon derived from carboxymethyl cellulose (CoFe2O4-Co3Fe7@C), through a straightforward high-temperature annealing process. Various characterizations are conducted on the CoFe2O4-Co3Fe7@C composites. The incorporation of CoFe2O4 and Co3Fe7 nanoparticles into the CMC-derived porous carbon enhances electron conduction pathways and reduces internal electrode resistance, resulting in outstanding electrochemical performance. When the CoFe2O4-Co3Fe7@C composite is carbonized at 700 °C with a current density of 0.5 A g−1, its specific capacitance reaches 3405.25 F g−1. At a power density of 321.44 W kg−1, an asymmetric supercapacitor with activated carbon as the positive and negative electrode and CoFe2O4-Co3Fe7@C-700 as the positive electrode has a maximum energy density of 187.59 Wh kg−1. Moreover, after 10,000 cycles, the composite shows 90.05 % cycling stability. This study paves the way for innovation in energy storage technology.
Published Version
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