Environmentally Sustainable Aluminium-coordinated Poly(tetrahydroxybenzoquinone) as a Promising Cathode for Sodium Ion Batteries

Title
Environmentally Sustainable Aluminium-coordinated Poly(tetrahydroxybenzoquinone) as a Promising Cathode for Sodium Ion Batteries
Authors
심지민김희중김영진정경화정민수김한슬이종찬이규태
Issue Date
2018-01
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 10, NO 4-3486
Abstract
Na-ion batteries are attractive as an alternative to Li-ion batteries because of their lower cost. Organic compounds have been considered as promising electrode materials due to their environmental friendliness and molecular diversity. Herein, aluminum-coordinated poly(tetrahydroxybenzoquinone) (P(THBQ-Al)), one of the coordination polymers, is introduced for the first time as a promising cathode for Na-ion batteries. P(THBQ-Al) is synthesized through a facile coordination reaction between benzoquinonedihydroxydiolate (C6O6H22-) and Al3+ as ligands and complex metal ions, respectively. Tetrahydroxybenzoquinone is environmentally sustainable, because it can be obtained from natural resources such as orange peels. Benzoquinonedihydroxydiolate also contributes to delivering high reversible capacity, because each benzoquinonedihydroxydiolate unit is capable of two electron reactions through the sodiation of its conjugated carbonyl groups. Electrochemically inactive Al3+ improves the structural stability of P(THBQ-Al) during cycling because of a lack of a change in its oxidation state. Moreover, P(THBQ-Al) is thermally stable and insoluble in nonaqueous electrolytes. These result in excellent electrochemical performance including a high reversible capacity of 113 mA h g(-1) and stable cycle performance with negligible capacity fading over 100 cycles. Moreover, the reaction mechanism of P(THBQ-Al) is clarified through ex situ XPS and IR analyses, in which the reversible sodiation of C=O into C-O-Na is observed.
URI
http://pubs.kist.re.kr/handle/201004/71123
ISSN
1944-8244
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KIST Publication > Article
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