Wang, Dan-Yang; Si, Yubing; Li, Junjie; Fu, Yongzhu published the artcile< Tuning the electrochemical behavior of organodisulfides in rechargeable lithium batteries using N-containing heterocycles>, Electric Literature of 2127-03-9, the main research area is organodisulfide tuning electrochem behavior rechargeable lithium battery.
S-S bonds in organodisulfides can break and obtain Li+ and e- in the discharge of lithium batteries. Organodisulfides provide precise lithiation sites, and therefore are valuable models for the study of redox reactions in lithium batteries. To understand their electrochem. behavior, we investigate three disulfides with different N-containing heterocycles including 2,2′-dipyridyl disulfide (2,2′-DpyDS), 4,4′-dipyridyl disulfide (4,4′-DpyDS), and 2,2′-dipyridyl disulfide-N,N’-dioxide (DpyDSDO). The three disulfides all show higher discharge voltage plateaus due to the electron-withdrawing groups: DPDS (2.20 V) < 2,2'-DpyDS (2.45 V) = 4,4'-DpyDS (2.45 V) < DpyDSDO (2.80 V). In particular, 2,2'-DpyDS exhibits an outstanding 69% capacity retention over 500 cycles. Our theor. simulations show that lithium pyridine-2-thiolate, the discharge product of 2,2'-DpyDS, forms compact clusters via N···Li···S bridges coordinated by lithium ions, which can help reduce its dissolution in liquid electrolyte, and therefore increase the cycle life. Liquid chromatog.-mass spectrometry is demonstrated to be a powerful tool for the investigation of discharge/recharge products of soluble organodisulfides in rechargeable lithium batteries. Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Battery cathodes. 2127-03-9 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2S2, Electric Literature of 2127-03-9.