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Stable materials for high energy applications

In a recent blog we reviewed the applications of room-temperature ionic liquid (RTIL) trihexyl(tetradecyl)phosphonium chloride aka CYPHOS^® IL 101 (CAS: 258864-54-9, Strem Catalog: 15-6382) [1, 2]. Like other quaternary phosphonium salts, CYPHOS^® IL 101 is amenable to anion exchange (i.e. metathesis) producing numerous ionic liquids with different anions.

The focus of this blog is on trihexyl(tetradecyl)phosphonium bis(trifluoromethanesulfonyl)amide aka CYPHOS® IL 109 (CAS: 460092-03-9, Strem Catalog: 15-6370, Ionic Liquid Kit 3: CYPHOS® IL Phosphonium Salt Kit, Strem Catalog: 96-6520).

The details of the preparations of CYPHOS® IL 109 and its physical properties can be found in [3-10].

Bis(trifluoromethanesulfonyl)amide-anion (often abbreviated TFSI or TFSA) imparts some important properties to the ionic liquids such as hydrophobicity, and good or very good thermal and electrochemical stabilities. Thus, ionic liquids with a TFSI anion are presently considered as a novel generation of electrolytes/electrolyte additives for both supercapacitors and lithium ion batteries.

CYPHOS® IL 109 was tested in electrolytes for supercapacitors [11-12] and as an additive for use in solid and gel polymer electrolytes [14-16].

Undoubtedly, one of the most interesting potential applications of CYPHOS® IL 109 is for generating ammonia at ambient conditions [17-19].

Beside the potential of CYPHOS® IL 109 in electrochemical applications, it is also being considered for some other important applications which will be reviewed in subsequent blogs.

References

1.  CYPHOS® IL 101 For Extraction of Metals
2.  A Suitable Candidate for Complete Extraction of Three Targeted Metals
3.  WO2003020683
4.  J. Organomet. Chem. 2005, 690, 10, 2536-2542.
5.  Green Chem., 2005, 7, 855–862.
6.  Proceedings - Electrochemical Society 2006, 2004-24, 326-339.
7.  J. Chem. Thermodynamics 41, 2009, 790–798.
8.  Electrochim. Acta2017, 245, 934–940.
9.  Nat. Commun. 2022, 13, 1, 1342.
10.  Aust. J. Chem. 2009, 62, 309–321.
11.  Appl. Phys. Lett. 2005, 86, 16, 164104/1-164104/3.
12.  J. Braz. Chem. Soc. 2006, 17, 6, 1074-1082.
13.  Mater. Res. Express 2017, 4, 8, 085501/1-085501/8.
14.  US20170187063
15.  Nanomaterials 2018, 8, 6, 435/1-435/17.
16.  J. Mater. Sci. Mater. Electron. 2020, 31, 24, 22933-22944.
17.  Chem. Lett. 2020, 49, 10, 1171-1173.
18.  WO2022256858
19.  Energy Environ. Sci. 2023, 16, 3, 1082-1090.

Featured Products

15-6382 Trihexyl(tetradecyl)phosphonium chloride, min. 95% CYPHOS IL 101 (258864-54-9)
15-6370 Trihexyl(tetradecyl)phosphonium bis(trifluoromethanesulfonyl)amide, min. 97% CYPHOS® IL 109 (460092-03-9)
96-6520 Ionic Liquid Kit 3: CYPHOS® IL Phosphonium Salt Kit