Nov 25, 2020 · Owing to excellent metallic conductivity, hydrophilic surfaces, and surface redox properties, a two-dimensional (2D) metal carbide of Ti3C2Tx-MXene could serve as a
Feb 19, 2024 · In the contemporary era of technological advancement, the escalating energy consumption paralleling enhanced living standards necessitates sustainable and eco-friendly
Feb 19, 2024 · Central to SCs'' efficacy are the electrode materials, with nickel-based compounds gaining prominence due to their high theoretical capacitance, affordability, ecological
Feb 1, 2025 · The synergistic effects of the nickel and carbon in the NiC 2 O 4 electrode highlight the potential of this material as an effective active material for supercapacitor applications. The
Recent research underscores the significance of nickel-based bimetallic materials, incorporated with metals like copper, silver, or cobalt, for supercapacitors. These materials are characterized by high-specific surface area, enhanced conductivity, and exceptional energy storage performance, contributing to both high energy and power densities.
Extensive research has been conducted on supercapacitors composed of carbon-based anode materials paired with nickel-based cathode materials, yielding significant advances. However, the limited specific capacitance of carbon-based materials has been a bottleneck, restricting the overall energy density of these devices.
The terminology of “supercapattery” is even used in some reports , . Hundreds of papers related to the nickel-based materials consider them as supercapacitor-type materials. Noteworthy, it is still under debate on the capacitive behavior of nickel-based materials.
Supercapacitors have stimulated a great scientific interest due to their importance for energy storage. Electrode materials, as the key part of supercapacitors, determine their performance. Nickel oxide/hydroxide, characterized by ultrahigh theoretical capacitance and other intriguing features, has drawn considerable attention.
Nickel-based electrode materials, in contrast, offer high-specific capacitance—a feature not inherent in carbon materials. Consequently, there has been a surge in research efforts aiming to construct symmetric supercapacitors using high-capacity nickel-based compounds and their composites.
In summary, asymmetric supercapacitors based on nickel-based cathode materials have made significant performance advancements compared to symmetric ones. However, challenges remain. Devices with carbon-based anode materials, despite their good rate performance, suffer from insufficient energy density.
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