Electrochemistry of Electrode Materials Containing S−Se Bonds for Rechargeable Batteries

Abstract

Sulfur (S) and selenium (Se) have been considered as promising high capacity cathode materials for rechargeable batteries. They have differencesintheir physical properties (e.g.,e lectronic conductivity) but the same number of electrons in their outermost shells,w hichl eads to similarity in their electrochemical behavior in batteries. In recent years, some efforts have been taken to combine them in electrodes in the hope of improved battery performance. The SÀSe bonds of these electrode materials lead to unusual properties and intriguing electrochemical behavior,w hich have attracted increasing interest. In thisM inireview,e lectrode materials containing SÀSe bonds are summarized, including inorganic S x Se y solid solutions, organic compounds, and organic-inorganic hybrid materials. Our understanding in these materials is still premature, but they have shown unique properties to be electrode materials. We hope this Minireview could provideanew insight into the design,s ynthesis, and understanding of thesem aterials, which could enable high energy density rechargeable batteries.

Organosulfur polymer-based cathode materials for rechargeable batteries

“…75 Introducing selenium into organosulfur copolymers is a new strategy to regulate the electrochemical behaviour of batteries in recent years. 76 Gomez and co-workers synthesized S-Se hybrid copolymer via the inverse vulcanization of S, Se, and DIB (Fig. 6c).…”

“…75 Introducing selenium into organosulfur copolymers is a new strategy to regulate the electrochemical behaviour of batteries in recent years. 76…”

Electrochemical Trifluoromethylselenolation of Activated Alkyl Halides

“…[23] However, selenium is a crucial trace element of the human machinery, [24][25][26] and selenolated compounds have found plethora of applications in multiple areas including life sciences and materials. [27][28][29][30][31][32][33] Therefore, several research groups recognized the potential of merging the CF 3 group with selenium, especially in the context of drug design, [34,35] to incorporate SeCF 3 moieties into organic structures. [21][22] The direct formation of C-(sp 2 )À SeCF 3 bond formation has been extensively studied and elegant trifluoromethylselenolation methods for the functionalization of aryl compounds have been reported.…”

“…Out of the three trifluoromethyl chalcogens, SeCF 3 has received less attention [21,22] as some Se‐containing substrates are sensitive to air and present high toxicity [23] . However, selenium is a crucial trace element of the human machinery, [24–26] and selenolated compounds have found plethora of applications in multiple areas including life sciences and materials [27–33] . Therefore, several research groups recognized the potential of merging the CF 3 group with selenium, especially in the context of drug design, [34,35] to incorporate SeCF 3 moieties into organic structures [21–22] .…”

Metal-free nucleophilic trifluoromethylselenolation via an iodide-mediated umpolung reactivity of trifluoromethylselenotoluenesulfonate

“…Despite, the negative reputation of selenium due to its toxicity at high doses, it is an essential trace element for human physiology and biochemistry [17][18][19][20]. Furthermore, selenolated compounds found valuable applications in materials [21][22][23], life sciences [19,20,[24][25][26][27][28][29], and drug design [30][31][32][33]. Consequently, the merging of fluorinated moieties, such as CF 3 with selenium could constitute an interesting motif in the design of new molecules, in particular in medicinal chemistry or agrochemistry.…”