Journal
MATERIALS
Volume 15, Issue 13, Pages -Publisher
MDPI
DOI: 10.3390/ma15134499
Keywords
nickel-cobalt oxide; carbon cloth; nano-needle arrays; supercapacitor
Categories
Funding
- Supercomputing Center of Lanzhou University
- Deanship of Scientific Research at King Khalid University Saudi Arabia [R.G.P. 2/196/43]
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Designing electrochemical energy conversion and storage materials with excellent performance is of great significance to meet the growing energy demand. This study demonstrates the synthesis of binder-free bimetallic NiCo2O4 nano-needles supported on CC (NCO@CC) through a facile and scalable hydrothermal process. The electrode exhibits excellent electrical conductivity and interconnected nanostructure, leading to outstanding electrochemical performances with high specific capacitance and capacitance retention even after a large number of cycles. The NCO@CC nano-needle array-structured electrode shows potential as a candidate for supercapacitor applications.
It is of great significance to design electrochemical energy conversion and storage materials with excellent performance to fulfill the growing energy demand. Bimetallic cobalt/nickel-based electrode materials exhibit excellent electrical conductivity compared to mono oxides. However, their potential as electrode materials for high-performance supercapacitors (SCs) is limited because of their poor cycling stability and high-capacity fading. This work demonstrates the synthesis of binder-free bimetallic NiCo2O4 nano-needles supported on CC (NCO@CC) via a facile and scalable hydrothermal process. Excellent electrical conductivity and interconnected nanostructure of NCO@CC nano-needles provide the fast transfer of electrons with numerous channels for ion diffusion. Owing to such features, the binder-free NCO@CC electrode for SC discloses excellent specific capacitance (1476 Fg(-1) at 1.5 Ag-1) with 94.25% capacitance retention even after 5000 cycles. From these outstanding electrochemical performances, it can be inferred that NCO@CC nano-needle array-structured electrodes may be potential candidates for SC applications.
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