Sodium insertion/extraction from single-walled and multi-walled carbon nanotubes: The differences and similarities
| Autor: | James C. Pramudita, Damian Goonetilleke, Neeraj Sharma, Aditya Rawal, Mohammad Choucair |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Carbon nanofiber Sodium Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Sodium-ion battery 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences law.invention chemistry Potential applications of carbon nanotubes Frit compression law Carbon nanotube supported catalyst Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 314:102-108 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2016.03.014 |
| Popis: | A comparative study on the sodium-ion insertion and extraction of commercially-available multi-wall and single-wall carbon nanotubes is reported. Single-wall carbon nanotubes exhibit charge/discharge capacities of 126 mA h g −1 and multi-wall carbon nanotubes produce a lower capacity of 28 mA h g −1 after 50 cycles at 25 mA g −1 . To understand these differences, a combination of X-ray diffraction and solid state nuclear magnetic resonance measurements were performed at various states of sodium insertion and extraction. 23 Na nuclear magnetic resonance studies, a technique previously rarely used for characterising electrodes from sodium-ion batteries, shows differences in the sodium chemical environment near multi-wall compared to single-wall carbon nanotubes with distinct sodium sites found to be active during sodium insertion and extraction for the carbon nanotubes. Both types of carbon nanotubes show a similar amount of reversible sodium available for insertion/extraction reactions, but multi-wall carbon nanotubes feature half the initial insertion capacity relative to single-wall carbon nanotubes. The electrochemical performance of the carbon nanotube electrodes are discussed in relation to the observed mechanism of sodium insertion. |
| Databáze: | OpenAIRE |
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