Zeolite-Templated Carbon as a Stable, High Power Magnesium-Ion Cathode Material
| Autor: | Nicholas P. Stadie, Romain J.-C. Dubey, Maksym V. Kovalenko, Kostiantyn V. Kravchyk, Erin E. Hanson, Roland Widmer, Marcel Aebli, Tess Colijn |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science Magnesium chemistry.chemical_element 02 engineering and technology Electrolyte Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Anode chemistry Chemical engineering law General Materials Science 0210 nano-technology Magnesium ion |
| Zdroj: | ACS applied materialsinterfaces. 11(43) |
| ISSN: | 1944-8252 |
| Popis: | One strategy to overcome the slow kinetics associated with electrochemical magnesium ion storage is to employ a permanently porous, capacitive cathode material together with magnesium metal as the anode. This strategy has begun to be employed, for example, using framework solids like Prussian blue analogues or porous carbons derived from metal-organic frameworks, but the cycling stability of an ordered, bottom-up synthesized, three-dimensional carbon framework toward magnesiation and demagnesiation in a shuttle-type battery remains unexplored. Zeolite-templated carbons (ZTCs) are a class of ordered porous carbonaceous framework materials with numerous superlative properties relevant to electrochemical energy storage. Herein, we report that ZTCs can serve as high-power cathode materials for magnesium-ion hybrid capacitors (MHCs), exhibiting high specific capacities (e.g., 113 mA h g-1 after 100 cycles) with an average discharge voltage of 1.44 V and exceptional capacity retention (e.g., 76% after 200 cycles). ZTC-based MHCs meet or exceed the gravimetric energy densities of state-of-the-art batteries functioning on the Mg2+ shuttle, while simultaneously displaying far superior rate capabilities (e.g., 834 W kg-1 at 600 mA g-1). |
| Databáze: | OpenAIRE |
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