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Title
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High-performance supercabatteries using graphite@diamond nano-needle capacitor electrodes and redox electrolytes
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Author
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Abstract
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| Supercabatteries have the characteristics of supercapacitors and batteries, namely high power and energy densities as well as long cycle life. To construct them, capacitor electrodes with wide potential windows and/or redox electrolytes are required. Herein, graphite@diamond nano-needles and an aqueous solution of Fe(CN)(6)(3-/4-) are utilized as the capacitor electrode and the electrolyte, respectively. This diamond capacitor electrode has a nitrogen-doped diamond core and a nano-graphitic shell. In 0.05 M Fe(CN)(6)(3-/4-) + 1.0 M Na2SO4 aqueous solution, the fabricated supercabattery has a capacitance of 66.65 mF cm(-2) at a scan rate of 10 mV s(-1). It is stable over 10 000 charge/discharge cycles. The symmetric supercabattery device assembled using a two-electrode system possesses energy and power densities of 10.40 W h kg(-1) and 6.96 kW kg(-1), respectively. These values are comparable to those of other energy storage devices. Therefore, diamond supercabatteries are promising for many industrial applications. |
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Language
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English
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Source (journal)
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Nanoscale / Royal Society of Chemistry [London] - Cambridge, 2009, currens
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Publication
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Cambridge
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2019
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ISSN
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2040-3364
[print]
2040-3372
[online]
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DOI
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10.1039/C9NR07037K
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Volume/pages
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11
:38
(2019)
, p. 17939-17946
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ISI
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000489646900036
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Pubmed ID
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31553006
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Full text (Publisher's DOI)
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Full text (open access)
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