Fan, Qianqian; Si, Yubing; Guo, Wei; Fu, Yongzhu published the artcile< Insight into Chemical Reduction and Charge Storage Mechanism of 2,2'-Dipyridyl Disulfide toward Stable Lithium-Organic Battery>, Recommanded Product: 1,2-Di(pyridin-2-yl)disulfane, the main research area is chem reduction dipyridyl disulfide lithium organic redox flow battery.
In lithium-organic batteries, organic cathode materials could dissolve in a liquid electrolyte and diffuse through the porous separator to the active lithium-metal anode, resulting in cycling instability. However, 2,2′-dipyridyl disulfide (PyDS) can be cycled 5 times better than di-Ph disulfide (PDS) although both are soluble We believe this is related to their reactivity with lithium (Li0). Herein, we investigate the chem. reduction of PyDS by lithiated carbon paper (Li-CP) in ether electrolyte. It is found that only 6.3% of PyDS was reduced by Li-CP after 10 days, unlike PDS. Exptl. and computational results show that PyDS mols. are ionized by lithium ions of lithium salts delocalizing the charge on pyridine rings of PyDS, which can momentarily store Li0, thus keeping the S-S bond inert in chem. reaction with Li0. This finding is successfully utilized in a membrane-free redox flow battery with PyDS catholyte, showing long cycle life with high energy d. and energy efficiency. This work reveals the interesting charge storage mechanism and the different activity of organodisulfides toward electrochem. reduction and chem. reduction due to the organic groups, which can provide guidance for the design of stable lithium-organic batteries.
Journal of Physical Chemistry Letters published new progress about Battery capacity. 2127-03-9 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2S2, Recommanded Product: 1,2-Di(pyridin-2-yl)disulfane.