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3,6-Diphenyltetrazine as Cathode Active Material for Sodium Ion Batteries (Supporting Information)

posted on 24.11.2022, 01:18 authored by Jun WATANABE, Masaki FURUSAWA, Kosuke NAKAMOTO, Yuchao SUN, Masatoshi TASHIMA, Keiko YAMAOKA, Seiko FUJIWARA, Han Seul KIM, Shigeto OKADA, Ken ALBRECH

3,6-diphenyltetrazine (DPT) is an electron-deficient π-conjugated molecule with a perfectly planar structure and high crystallinity. In this study, discharge-charge tests of crystalline DPT as a cathode material for sodium ion batteries were conducted. DPT showed an initial reversible capacity of 102 mAh/g (theoretical capacity 114 mAh/g), corresponding to one electron reaction. The plateau of the discharge-charge profiles was observed at 1.9–2.1 V vs. Na/Na+. According to the ex-situ XRD, FT-IR, and XPS measurements to investigate the discharge-charge mechanism, the redox center was identified as the conjugated tetrazine ring. DPT was in a crystalline form in both the charged and discharged state and indicated the potential as a reversible Na ion host.


Ministry of Education, Culture, Sports, Science and Technology, Japan

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Kyushu University Platform of Inter-/Transdisciplinary Energy Research (QPIT)

Industrial Science Research Promotion Foundation


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