AI Article Synopsis
- Researchers developed hollow RuO2 nanotube arrays on carbon cloth to create a binder-free electrode with top-notch electrochemical performance.
- They constructed a solid-state asymmetric supercapacitor using RuO2 and Fe2O3, achieving impressive metrics like a capacitance of 4.9 F cm-3 and 97% retention after 5000 cycles.
- The success is attributed to the unique hollow design, which enhances ion transport and increases the interface for charge transfer, suggesting that this approach could work for various materials.
Article Abstract
In this work, hollow RuO2 nanotube arrays were successfully grown on carbon cloth by using a facile two-step method to fabricate a binder-free electrode. The well-aligned electrode displays excellent electrochemical performance. By using RuO2 hollow nanotube arrays as the positive electrode and Fe2O3 as the negative electrode, a flexible solid-state asymmetric supercapacitor (ASC) has been fabricated which exhibited excellent electrochemical performance, such as a high capacitance of 4.9 F cm-3, a high energy density of 1.5 mW h cm-3 and a high power density of 9.1 mW cm-3. In addition, the two-electrode SC shows high cycling stability with 97% capacitance retention after 5000 charge-discharge cycles. These excellent electrochemical performances are ascribed to the unique hollow structural design of electrodes, which can shorten the ion diffusion length, provide a fast ion transport channel, and offer a large electrode/electrolyte interface for the charge-transfer reaction. The structural design and the synthesis approach are general and can be extended to synthesizing a broad range of materials systems.
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| http://dx.doi.org/10.1039/c8dt00740c | DOI Listing |
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