Analytical Measurements to Elucidate Structural Behavior of 2, 5‐Dimethoxy‐1, 4‐benzoquinone During Charge and Discharge. Issue 9 (28th April 2020)

• Record Type: Journal Article
• Authors: Sano, Hikaru; Takeichi, Nobuhiko; Kato, Minami; Shikano, Masahiro; Kiyobayashi, Tetsu; Matsumoto, Hajime; Kuwabata, Susumu; Yao, Masaru
• Is Part Of: ChemSusChem. Volume 13:Issue 9(2020)
• Page Start: 2354
• Page End: 2363
• Publication Date: 2020-04-28
• Subjects: batteries -- NMR spectroscopy -- Raman spectroscopy -- SQUID -- X-ray diffraction; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201903575
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Organic compounds as electrode materials can contribute to sustainability because they are nontoxic and environmentally abundant. The working mechanism during charge–discharge for reported organic compounds as electrode materials is yet to be completely understood. In this study, the structural behavior of 2, 5‐dimethoxy‐1, 4‐benzoquinone (DMBQ) during charge—discharge is investigated by using NMR spectroscopy, energy‐dispersive X‐ray spectroscopy, magnetic measurements, operando Raman spectroscopy, and operando X‐ray diffraction. For both lithium and sodium systems, DMBQ works as a cathode accompanied with the insertion and deinsertion of Li and Na ions during charge—discharge processes. The DMBQ sample is found to be in two‐phase coexistence state at the higher voltage plateau, and the radical monoanion and dianion phases have no long‐distance ordering. These structures reversibly change into the original neutral phase with long‐distance ordering. These techniques can show the charge–discharge mechanism and the factors that determine the deterioration of organic batteries, thus guiding the design of future high‐performance organic batteries. Abstract : Made to measure : The crystallographic structure change of 2, 5‐dimethoxy‐1, 4‐benzoquinone (DMBQ) during charge–discharge is investigated by using operando X‐ray diffraction, which reveals that the DMBQ sample is found to be in two‐phase coexistence state at the higher voltage plateau. Radical monoanion and dianion phases have no long‐distance ordering for either Li or Na systems.