10.1039/c7gc00849j
The research investigates the use of N,N'-substituted phenazine (NSPZ) derivatives as a new class of p-type organic redox centers for building ready-to-charge organic batteries. The study demonstrates that NSPZ cathodes can facilitate reversible two-electron transfer at 3.7 and 3.1 V in dual-ion batteries, resulting in a specific energy of 622 Wh kg^-1. The chemicals that played a significant role in this research include 5,10-dihydro-5,10-dimethyl phenazine (DMPZ), mP-DPPZ, and pP-DPPZ, which were synthesized and used as active materials in the battery electrodes. Various electrolytes, such as LiClO4, LiTFSI, LiPF6, NaClO4, and MgClO4, were employed to test the electrolyte salt and solvent dependence of the anion association reaction. The research also involved the use of conductive carbon (Super P) and polytetrafluoroethylene (PTFE) binder for electrode fabrication, as well as tetraethylene glycol dimethyl ether (TEGDME) as a solvent for the electrolyte.
10.1246/cl.150836
The research investigates the impact of steric effects on the cyclability of benzoquinone-type organic cathode active materials for rechargeable lithium-ion batteries (LIBs). The purpose is to improve the cycle-life performance, which has been a drawback for these types of cathode materials. By synthesizing and incorporating benzoquinones bearing alkyl groups with varying degrees of bulkiness—specifically methyl (Me2-BQ), isopropyl (iPr2-BQ), and tert-butyl (tBu2-BQ)—into coin-type cells, the study evaluates how the substituents' steric bulk influences battery performance. The tetraglyme electrolyte system provided the most stable cyclability compared to other electrolyte systems used in this study. This finding suggests a promising molecular design strategy for developing high-performance organic cathode materials for LIBs.
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