SULFONYLIMIDE SALT AND METHOD FOR PRODUCING THE SAME
申请人:Okumura Yasunori
公开号:US20110034716A1
公开(公告)日:2011-02-10
The present invention provides a method for producing fluorosulfonylimides more safely, rapidly and efficiently, which enables suppression of production of by-products, and fluorosulfonylimides. The method for producing a fluorosulfonylimide salt of the present invention includes a step of reacting a fluoride compound containing at least one element selected from the group consisting of elements of Group 11 to Group 15 and Period 4 to Period 6 (excluding arsenic and antimony) with a compound represented by the following general formula (I) to give a fluorosulfonylimide salt represented by the general formula (II):
wherein R
1
denotes at least one element selected from the group consisting of elements of Group 11 to Group 15 and Period 4 to Period 6 (excluding arsenic and antimony); R
3
denotes fluorine, chlorine or a fluorinated alkyl group having 1 to 6 carbon atoms; R
4
denotes fluorine or a fluorinated alkyl group having 1 to 6 carbon atoms; and m denotes an integer of 2 or 3.
The ethyleneoxide unit in EFA endows nanosized self‐agglomeration of anions and trapping interactions between the anions and its structurally homologous matrix, poly(ethyleneoxide), thus suppressing the mobility of negative charges. In contrast to previous strategies of using anion traps or tethering anions to a polymer/inorganic backbone, this work offers a facile and elegant methodology on accessing
The invention provides a method for producing fluorotrifluoromethylsulfonyl imide (FTFSI) by reacting non-fluorohalogenated trihalomethylsulfonyl imide (XTXSI) with hydrogen fluoride, where each X is independently a nonfluoro-halide, such as Cl, Br, or I.
Solid-state lithium metal (Li°) batteries (SSLMBs) are believed to be the most promising technology to satisfy the high energy demand, meet the safety requirements, and overcome the limitations ascribed to currently used Li-ion batteries. Solid polymer electrolytes (SPEs) arise as the best candidates mainly due to their easy manufacturing, flexibility, and cost compared to their inorganic counterparts. However, conventional lithium bis(trifluoromethanesulfonyl)imide and poly(ethylene oxide)-based SPEs suffer from a low lithium-ion transference number (TLi+) and poor Li° electrode compatibility as demonstrated by the compromised cyclability of these electrolytes in SSLMBs. Herein, we report the performance of SPEs comprising a newly designed N-ethyl-N-methyl-functionalized sulfonimide lithium salt, with wide electrochemical stability, decreased anionic diffusivity, sufficient Li-ion conductivity, and superior compatibility with the Li° electrode.