In:
ChemSusChem, Wiley, Vol. 13, No. 9 ( 2020-05-08), p. 2379-2385
Abstract:
Many types of batteries have been proposed as next‐generation energy‐storage systems. One candidate is a rocking‐chair‐type “molecular ion battery” in which a molecular ion, instead of Li + , works as a charge carrier. Previously, we reported a viologen‐type derivative as a negative electrode material that releases and receives PF 6 − anions during the charge–discharge process; however, its redox potential was not satisfactorily low. Further, the two potential plateaus of this material (difference=0.5 V) should be reduced. In this study, PF 6 − salts of viologen (bipyridinium) derivatives extended by aromatic rings were synthesized to obtain a negative electrode material with a lower redox potential and small potential change during the charge and discharge processes. Some of the synthesized viologen derivatives were fluorescent even in solid‐state electrodes. In the half‐cell configuration, the prepared negative electrode materials showed average voltages of approximately 2 V (vs. Li + /Li), which is lower than that of conventional viologen derivatives.
Type of Medium:
Online Resource
ISSN:
1864-5631
,
1864-564X
DOI:
10.1002/cssc.201903541
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2411405-4
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