Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6602318 | Electrochimica Acta | 2018 | 10 Pages |
Abstract
We investigated the electronic structures of low-molecular-weight dithiobiuret (DTB) compounds in both reduced and oxidized states along with those of a DTB polymer in the discharged and charged states using X-ray absorption near edge structure (XANES) measurements. DTB is a simple and lightweight organosulfur molecule with two neighboring tautomeric thiol/thione groups (-SH/>CS) that can form disulfide (S-S) bonds by reversible oxidative cyclization. The DTB polymer, composed of alternating DTB and phenylene (Ph) units, exhibited a high capacity (about 260â¯mAâ¯hâ¯gâ1) without any significant degradation in the charge and discharge cycle characteristics. Based on XANES measurements, charge-discharge experiments, and quantum chemical calculations, we propose that the reactions of two types of redox couples contribute the redox reaction of the DTB polymer.
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Authors
Hiroshi Uemachi, Yuske Tamenori, Tetsuya Itono, Takashi Masuda, Tatsuya Shimoda, Akihiko Fujiwara,