Boosting the charge transfer efficiency of metal oxides/carbon nanotubes composites through interfaces control
| Autor: | Enzuo Liu, Simi Sui, Chunnian He, Naiqin Zhao, Chunsheng Shi, Junwei Sha, Ma Liying, Shan Zhu, Xiaoyang Deng, Fang He |
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| Rok vydání: | 2021 |
| Předmět: |
Horizontal scan rate
Materials science Renewable Energy Sustainability and the Environment Composite number Oxide Energy Engineering and Power Technology 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Energy storage Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Electrode Electrical and Electronic Engineering Physical and Theoretical Chemistry Composite material 0210 nano-technology Power density |
| Zdroj: | Journal of Power Sources. 489:229501 |
| ISSN: | 0378-7753 |
| Popis: | Metal oxide/carbon materials composites (MOx/C) are broadly used as electrodes in energy storage devices. However, their capacity under high rates is limited due to the sluggish ion/electron transportation during faradaic reactions. In this work, carbon nanotube carpets (CC)/Fe2O3 nanoparticles covered with bud-liked carbon layer (CC/Fe2O3@b-C) is developed as an electrode by interfaces design. It is found that the bud-liked carbon wrapper enlarges interface area and provides an accelerated conducting network between CC and Fe2O3 nanoparticles through “seamless” connection. With boosted charge transfer efficiency, this composite demonstrates an excellent rate capability. The CC/Fe2O3@b-C electrode shows a high capacity of 246.15 mC cm−2 under 5 mV s−1 and can maintain ~95% when the scan rate is increased to 100 mV s−1. Moreover, the hybrid device paired with carbon fiber cloth (CFC)/Co(OH) 2 cathode exhibits simultaneous high energy density and power density, showing good potential application in high-power devices. |
| Databáze: | OpenAIRE |
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