Inorganic-Organic Ionic Liquid Electrolytes Enabling High Energy-Density Metal Electrodes for Energy Storage

Forsyth, Maria; Girard, Gaetan M. A.; Basile, Andrew; Hilder, Matthias; MacFarlane, Douglas R.; Chen, Fang Fang; Howlett, Patrick C.

doi:10.1016/j.electacta.2016.10.134

Cited by 95 publications

(101 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most aprotic ionic liquids have high thermal stability (i. e., Td≥300 °C), negligible vapor pressure and low flammability. By changing the functional groups of the cations and/or anions, ILs can be designed with specific physical and electrochemical properties, which have been widely used in different electrolyte systems . Overall, using ILs as solvents or co‐solvents in electrolytes for storage devices may increase their thermal stability, extend their electrochemical operating window and improve their conductivity.…”

Section: Rechargeable Mg Batteriesmentioning

confidence: 99%

Mg Cathode Materials and Electrolytes for Rechargeable Mg Batteries: A Review

MacFarlane

Kar

2019

Batteries & Supercaps

121

View full text Add to dashboard Cite

The development of energy storage devices has been motivated by the growing availability of sustainable energy sources, as well as the wider application of portable devices and a variety of electric vehicles including bicycles, scooters, cars and buses. Concerns regarding the safety of lithium batteries in certain applications, and limited lithium and cobalt resources required for conventional cathode materials, have driven researchers to develop alternatives that are safer and cheaper, thereby using more abundant metals such as sodium, magnesium, aluminium, and calcium. Among them, rechargeable magnesium batteries have drawn special interest, since Mg does not plate in a dendritic form, which opens up the possibility of the safe use of a simple metal anode. In this review, we summarize typical Mg electrolyte systems that are compatible with reversible Mg deposition and stripping, focusing on the active Mg complexes. To fabricate a rechargeable device, an appropriate cathode is necessary, which must also be abundant and compatible with the electrolytes to suitable cathode materials are also briefly discussed.

show abstract

Section: Rechargeable Mg Batteriesmentioning

confidence: 99%

Mg Cathode Materials and Electrolytes for Rechargeable Mg Batteries: A Review

MacFarlane

Kar

2019

Batteries & Supercaps

121

View full text Add to dashboard Cite

show abstract

“…[4a] This extraordinary performance was ascribed to the inhibition of corrosion of the Al cathode current collector (whichg enerally occurs at 4.3 V) because there were few free DMC molecules to coordinatetothe oxidized Al cations-a crucial step in the corrosion and dissolution of Al. [6] Electrolytes composed of an IL, trimethyl(isobutyl)phosphonium bis(fluorosulfonyl)imide (P 111i4 FSI), containing 0.5-3.8 mol kg À1 LiFSI, were systematically studied in terms of thermal, transport, and electrochemicalp roperties. [4b] Ionic liquids (ILs) are anotherp romising class of electrolytes, which are increasingly being studied as high-concentration systemso rm ixed inorganic-organic salts.…”

Section: Introductionmentioning

confidence: 99%

Solid‐State Lithium Conductors for Lithium Metal Batteries Based on Electrospun Nanofiber/Plastic Crystal Composites

et al. 2017

View full text Add to dashboard Cite

Organic ionic plastic crystals (OIPCs) are a class of solid-state electrolytes with good thermal stability, non-flammability, non-volatility, and good electrochemical stability. When prepared in a composite with electrospun polyvinylidene fluoride (PVdF) nanofibers, a 1:1 mixture of the OIPC N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ([C mpyr][FSI]) and lithium bis(fluorosulfonyl)imide (LiFSI) produced a free-standing, robust solid-state electrolyte. These high-concentration Li-containing electrolyte membranes had a transference number of 0.37(±0.02) and supported stable lithium symmetric-cell cycling at a current density of 0.13 mA cm . The effect of incorporating PVdF in the Li-containing plastic crystal was investigated for different ratios of PVdF and [Li][FSI]/[C mpyr][FSI]. In addition, Li|LiNi Co Mn O cells were prepared and cycled at ambient temperature and displayed a good rate performance and stability.

show abstract

“…A further increase in Li molar ratio results in a slight decrease in the ionic conductivity to 6.6×10 −6 S cm −1 at 50 °C for S‐PIL 64‐16 ( Li : 5.81; IL : 0.39). The decreasing ionic conductivity for an Li molar ratio

\geq

3.00 is possibly due to the formation of multidendate FSI/TFSI anion‐Li‐coordination due to the high content of lithium salt, resulting in significant aggregation ,. Indeed, a decrease of anion (FSI and TFSI) to Li + molar ratio (from 3.4 to 1.2) is observed when a Li molar ratio of 0.58 and 5.81 are used, respectively.…”

Section: Figurementioning

confidence: 99%

“…However, the use of a lithium‐metal anode in conjunction with traditional liquid‐based electrolytes presents a new set of challenges: i) poor cyclability due to the formation of a passive layer at the lithium‐electrolyte interface, (i. e. formation of lithium dendrites caused by irregular lithium deposition during the charging process, which in turn leads to a significantly shortened cycle life), ii) using a heavy battery case to avoid electrolyte leakage; and iii) a potential explosion hazard due to the flammable nature and volatility of traditional liquid electrolytes ,. A promising solution to overcome these challenges lies in the use of solid polymer electrolytes (SPEs) with a sufficiently high modulus ,.…”

Section: Figurementioning

confidence: 99%

Enabling High Lithium Conductivity in Polymerized Ionic Liquid Block Copolymer Electrolytes

Goujon

Huynh

Barlow

et al. 2018

Batteries & Supercaps

View full text Add to dashboard Cite

Herein, the use of a novel block copolymer host, based on a polymerized ionic liquid block copolymer, is proposed. Mechanically robust solid polymer electrolytes (SPEs) with high lithium conductivity are developed using a ternary polymer electrolyte system, consisting of a poly(styrene‐b‐1‐((2‐acryloyloxy)ethyl)‐3‐butylimidazolium bis(trifluoromethanesulfo‐nyl)imide) (S‐PIL64‐16) block copolymer, a N‐propyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide (C3mpyrFSI) ionic liquid (IL) and a lithium bis (fluorosulfonyl) imide (LiFSI) salt. The impact of both IL and lithium salt concentration on the morphology, ion migration processes and electrochemical performance of the electrolytes is characterized. High lithium ion conductivity is achieved when anion to Li+ molar ratio was kept below a value of 1.5, resulting in a lithium transport number (boldtboldLboldi+ ) as high as 0.53 at 50 °C. Finally, the cycling performance in a Li|LiFePO4 full cell is assessed using an in‐house formulated solid‐state high loading cathode (LiFePO4 loading=10 mg cm−2, 1.8 mAh cm−2). 98 % of the theoretical discharge capacity (167 mA g−1) is achieved for the first cycle at a C‐rate of C/20 at 50 °C. The results herein reported are the first demonstration of a PIL block copolymer‐IL‐salt composite electrolyte operating at near‐practical levels, making them a promising choice of electrolyte for the next generation of solid‐state high capacity lithium‐metal batteries.

show abstract

Inorganic-Organic Ionic Liquid Electrolytes Enabling High Energy-Density Metal Electrodes for Energy Storage

Cited by 95 publications

References 30 publications

Mg Cathode Materials and Electrolytes for Rechargeable Mg Batteries: A Review

Mg Cathode Materials and Electrolytes for Rechargeable Mg Batteries: A Review

Solid‐State Lithium Conductors for Lithium Metal Batteries Based on Electrospun Nanofiber/Plastic Crystal Composites

Enabling High Lithium Conductivity in Polymerized Ionic Liquid Block Copolymer Electrolytes

Contact Info

Product

Resources

About