Room Temperature Molten Salts (Ionic Liquids) as Electrolytes in Rechargeable Lithium Batteries

Čaja, Josip; Don, Trong‐Ming; Dunstan, J.; Katović, Vladimir; Ryan, David M.

doi:10.4271/1999-01-1403

Cited by 10 publications

(16 citation statements)

References 8 publications

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“…Here 1 H, 7 Li, and 19 F were detected as NMR-sensitive nuclei corresponding to the P 13 , Li, and TFSI ion components of the polymer gel electrolyte. NMR measurements were performed on a Chemagnetics CMX-300 spectrometer in conjunction with a JMT superconducting magnet of field strength 7.1 T. The Larmor frequencies for 1 H, 7 Li, and 19 F were 300.0, 116.9, and 283.2 MHz, respectively. Measurements were carried out on ∼500 mg samples which were inserted and packed into 5 mm Pyrex tubes in a very low humidity (<5 ppm) dry box (VAC).…”

Section: Measurementsmentioning

confidence: 99%

“…A coolingheating-recooling cycle was carried out first, and DSC data were collected during the subsequent heating step. 1 H, 7 Li, and 19 F NMR techniques were used to investigate the ion transport of polymer gel electrolytes over the temperature range of 20 to 120°C. Here 1 H, 7 Li, and 19 F were detected as NMR-sensitive nuclei corresponding to the P 13 , Li, and TFSI ion components of the polymer gel electrolyte.…”

Section: Measurementsmentioning

confidence: 99%

“…1 H, 7 Li, and 19 F NMR techniques were used to investigate the ion transport of polymer gel electrolytes over the temperature range of 20 to 120°C. Here 1 H, 7 Li, and 19 F were detected as NMR-sensitive nuclei corresponding to the P 13 , Li, and TFSI ion components of the polymer gel electrolyte. NMR measurements were performed on a Chemagnetics CMX-300 spectrometer in conjunction with a JMT superconducting magnet of field strength 7.1 T. The Larmor frequencies for 1 H, 7 Li, and 19 F were 300.0, 116.9, and 283.2 MHz, respectively.…”

Section: Measurementsmentioning

confidence: 99%

“…[5][6][7][8][9][10][11][12][13] Ionic liquids are room-temperature molten salts typically consisting of bulky, asymmetric organic cations and inorganic anions. The important attributes of ionic liquids include a wide electrochemical window, high ionic conductivity, and high thermal stability.…”

mentioning

confidence: 99%

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Li Ion Conducting Polymer Gel Electrolytes Based on Ionic Liquid/PVDF-HFP Blends

Huang

et al. 2007

J. Electrochem. Soc.

186

141

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Ionic liquids thermodynamically compatible with Li metal are very promising for applications to rechargeable lithium batteries. 1-methyl-3-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (P 13 TFSI) is screened out as a particularly promising ionic liquid in this study. Dimensionally stable, elastic, flexible, nonvolatile polymer gel electrolytes (PGEs) with high electrochemical stabilities, high ionic conductivities and other desirable properties have been synthesized by dissolving Li imide salt (LiTFSI) in P 13 TFSI ionic liquid and then mixing the electrolyte solution with poly(vinylideneco-hexafluoropropylene) (PVDF-HFP) copolymer. Adding small amounts of ethylene carbonate to the polymer gel electrolytes dramatically improves the ionic conductivity, net Li ion transport concentration, and Li ion transport kinetics of these electrolytes. They are thus favorable and offer good prospects in the application to rechargeable Li batteries including open systems like Li/air batteries, as well as more "conventional" rechargeable lithium and lithium ion batteries.As is well known, Li is the most electropositive and lightest metal, and thus has the greatest theoretical specific capacity of 3860 Ah/kg.1 , 2 This has attracted worldwide efforts of researchers and manufacturers to develop advanced battery technologies based on lithium. To date, the rechargeable lithium ion battery has already been one of the best choices in view of specific capacity and cycle stability. 1 However, rechargeable lithium metal batteries with even higher specific capacities are still unavailable in the market, especially lithium/air batteries which possess the highest theoretical specific energy (as high as 13,000 Wh/g, excluding the oxygen from the air). Conventional Li/air batteries based on aqueous electrolytes suffer from fast capacity loss due to corrosion of lithium by water and are also nonrechargeable. Abraham and Jiang first reported a rechargeable lithium/oxygen cell using organic polymer gel electrolytes and demonstrated its advantages such as an all solid state design, rechargeablity and a high capacity. 3 Read studied the effect of electrolyte and air cathode formulation on the electrochemical properties of an Li/O 2 organic electrolyte cell and found that electrolyte composition has the largest effect on discharge capacity and rate capability. 4 Both groups incorporated common organic solvents in the electrolyte, i.e., ethylene carbonate (EC), propylene carbonate (PC), 1,2-dimethoxyethane, diethyl carbonate (DEC), dimethyl carbonate, γ-butyrolactone, tetrahydrofuran, or tetrahydropyran. 3, 4 The highly reactive lithium metal cannot, however, be thermodynamically compatible with common organic solvents. NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript considerable additional challenges in improving the properties of the electrolytes being used, such as meeting the requirements of little to no volatility, moisture insensitivity and air stability. Our efforts are concerned with developing s...

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Section: Measurementsmentioning

confidence: 99%

Section: Measurementsmentioning

confidence: 99%

Section: Measurementsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Li Ion Conducting Polymer Gel Electrolytes Based on Ionic Liquid/PVDF-HFP Blends

Huang

et al. 2007

J. Electrochem. Soc.

186

141

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“…One of the first recognised uses of ionic liquids was as a solvent system for the room temperature electrodeposition of aluminium. 100 In addition, much of the additional development of ionic liquids was focused on their use as electrolytes for battery and capacitor applications. 101 Chemical and electrochemical studies on the ionic liquids have until recently been dominated by work in the room-temperature haloaluminate molten salts.…”

Section: Inorganic Synthesis In Ionic Liquidsmentioning

confidence: 99%

Electrochemical routes for industrial synthesis

Sequeira¹,

Santos²

2009

J. Braz. Chem. Soc.

119

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Esta revisão examina as razões que justificam um interesse crescente da indústria química pelos processos eletrolíticos. Reveem-se as indústrias químicas, nas quais compostos orgânicos e inorgânicos são processados e descrevem-se os avanços tecnológicos mais relevantes. Inicialmente, abordam-se processos bem estabelecidos, como as indústrias cloroalcalinas de produção de alumínio, p-aminofenol, adiponitrila, etileno glicol, antraquinona, produtos perfluorados, ácido glioxílico e L-cisteína. Face à grande quantidade de informação disponível, o assunto é tratado com base científica, mas de modo bastante simplificado. Posteriormente, descrevem-se processos orgânicos e inorgânicos emergentes, nomeadamente processos eletroquímicos mediados e síntese em líquidos iónicos. Estabelecem-se paralelos entre síntese química e síntese eletroquímica. Estimula-se o interesse nos processos de eletrossíntese, particularmente em líquidos iónicos, não desmerecendo a importância das vias puramente químicas de síntese orgânica e inorgânica.This review examines the reasons for increasing interest towards electrolyses by the chemical industry, reviews the electrochemical industries as most of them now exist, and provides a status report on the key technological advances which are occurring to meet present and future needs. Classical industries like those of chloroalkali, aluminium, p-aminophenol, adiponitrile, ethylene glycol, anthraquinone, perfluorinated products, glyoxylic acid and L-cysteine are initially covered. Considering the large amount of available publications in these topics of electrochemical engineering, the covered relevant information is treated at a scientific level, although in a simplified way. Then the paper deals with emerging inorganic and organic processes, e.g. electrosynthesis in ionic liquids and mediated electrochemical processes, and finishes by assessing what the future development trend might be given the electrochemical and non electrochemical competing influences. With this approach it is hoped to stimulate the interest of chemical engineers and scientists non-specialised in electrochemical routes, and to review some cutting edge research, particularly as far as electrosynthesis in ionic liquids is concerned.

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Application of Ionic Liquids to Li Batteries

Sakaebe

Matsumoto

2005

Electrochemical Aspects of Ionic Liquids

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Room Temperature Molten Salts (Ionic Liquids) as Electrolytes in Rechargeable Lithium Batteries

Cited by 10 publications

References 8 publications

Li Ion Conducting Polymer Gel Electrolytes Based on Ionic Liquid/PVDF-HFP Blends

Li Ion Conducting Polymer Gel Electrolytes Based on Ionic Liquid/PVDF-HFP Blends

Electrochemical routes for industrial synthesis

Application of Ionic Liquids to Li Batteries

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