Dual-Ion Cells based on the Electrochemical Intercalation of Asymmetric Fluorosulfonyl-(trifluoromethanesulfonyl) imide Anions into Graphite

Electrolytes for Batteries with Earth‐Abundant Metal Anodes

“…In the early 1990s, it was found that some ILs, such as [EMIC] [AlCl 3 ], had the properties of dual-ionr eactions at different potentials (Figure 8a,b). [77][78][79] The renaissance of dual-ion batteries may benefit from the development of electrolytes for LIBs, for which LiPF 6 ,L iTFSI, LiFSI, LiBF 4 ,a nd LiClO 4 are considered to be the most promising electrolytes for LIBs. The EMI + ions reductively intercalate into the graphite anode,w hereas the AlCl 4 À ions oxidatively intercalate into the graphite cathode.T hey also found that different kinds of cations/anionsh ad distinctive intercalation potentials.…”

“…This work opens the way to dual-ion energy-storage systems. [79,87,89] The anode was substituted with lithium foil, rathert han graphite. [77][78][79] The renaissance of dual-ion batteries may benefit from the development of electrolytes for LIBs, for which LiPF 6 ,L iTFSI, LiFSI, LiBF 4 ,a nd LiClO 4 are considered to be the most promising electrolytes for LIBs.…”

Intercalation manners of perchlorate anion into graphite electrode from organic solutions

“…Recently, much attention has been focused on ionic liquids which allow reliable operation in highly oxidizing circumstance [1,2,5,[8][9][10][12][13][14][15][16]. However, the drawbacks such as relatively poor compatibility with graphitic electrodes and high viscosity at room temperature may become problems in practical applications [10].…”

“…However, situation is changing as people begin to be aware of their outstanding merits as follows. First, many anions can intercalate into graphite reversibly [2][3][4][5][6], even though their sizes are much larger than Li + ; Second, a relatively high specific capacity of more than 110 mAh g À1 can be delivered [4,7,8]; Third, the potential for the intercalation process ranges from 4.5 to 5.5 V vs. Li/Li + , which is still a heavy task for most lithium-storage positive electrode materials at present [9][10][11]. Apart from the above, the beneficial properties also include low cost, high electronic conductivity, abundant sources et al In short, anion-intercalated graphite compounds are qualified to pave a way for some new types of electric storage devices.…”

Synthesis of Spherical Graphite Particles and Their Application as Cathode Material in Dual-Ion Cells

“…FTFSI ((CF 3 SO 2 )(FSO 2 )N -) vs. TFSI anion (7). However, when organic solvent-based electrolytes are applied, the intercalation behavior becomes more complex, since solvent co-intercalation reactions can take place, influencing the overall capacity and stability (13,15).…”