Advanced Functional Materials· 2012Q1
Ultrathin Mesoporous NiCo<sub>2</sub>O<sub>4</sub> Nanosheets Supported on Ni Foam as Advanced Electrodes for Supercapacitors
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- Q1SCImago
- 2012year
Short summary
Ultrathin mesoporous NiCo2O4 nanosheets grown on nickel foam achieve a specific capacitance of 1450 F/g at 20 A/g, demonstrating superior performance for supercapacitor electrodes.
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Key points
- Ultrathin mesoporous NiCo2O4 nanosheets (few nm thick, 2-5 nm pores) were grown on nickel foam.
- The synthesis involved co-electrodeposition of a bimetallic hydroxide precursor and subsequent thermal transformation.
- The electrode material exhibits fast electron and ion transport, large electroactive surface area, and structural stability.
- Achieved an ultrahigh specific capacitance of 1450 F/g at a high current density of 20 A/g.
- Demonstrated excellent cycling performance at high rates.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract A facile two‐step method is developed for large‐scale growth of ultrathin mesoporous nickel cobaltite (NiCo 2 O 4 ) nanosheets on conductive nickel foam with robust adhesion as a high‐performance electrode for electrochemical capacitors. The synthesis involves the co‐electrodeposition of a bimetallic (Ni, Co) hydroxide precursor on a Ni foam support and subsequent thermal transformation to spinel mesoporous NiCo 2 O 4 . The as‐prepared ultrathin NiCo 2 O 4 nanosheets with the thickness of a few nanometers possess many interparticle mesopores with a size range from 2 to 5 nm. The nickel foam supported ultrathin mesoporous NiCo 2 O 4 nanosheets promise fast electron and ion transport, large electroactive surface area, and excellent structural stability. As a result, superior pseudocapacitive performance is achieved with an ultrahigh specific capacitance of 1450 F g −1 , even at a very high current density of 20 A g −1 , and excellent cycling performance at high rates, suggesting its promising application as an efficient electrode for electrochemical capacitors.
The authors' abstract, as published at the source. Advanced Functional Materials, 2012 · DOI ↗
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Field: Electronic, Optical and Magnetic Materials
Electronic, Optical and Magnetic MaterialsMaterials Science