Ionic liquid electrolytes for high-voltage rechargeable Li/LiNi0.5Mn1.5O4 cells

Wongittharom, Nithinai; Lee, Tai Chou; Hung, I‐Ming; Lee, Sheng Wei; Wang, Yi-Chen; Chang, Jeng‐Kuei

doi:10.1039/c3ta14423b

Cited by 28 publications

(21 citation statements)

References 35 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…19,20 Recent advances in the field of Li secondary batteries have suggested that ILs represent a viable alternative to overcome the disappointing compromises between performance and safety features with organic electrolytes. 20,21 However, the adoption of IL electrolytes for Na batteries has received less attention so far. 22,23 In our previous studies, the charge-discharge behavior of Na 2 FeP 2 O 7 electrodes in Na[FSA]-[C 3 C 1 pyrr][FSA] (where FSA = bis(fluorosulfonyl)amide and C 3 C 1 pyrr = N-methyl-Npropylpyrrolidinium) IL electrolytes was investigated over a wide temperature range of 253-363 K. 24 The results revealed a considerable enhancement in rate capability with increasing temperature along with an outstanding cyclability, implying that there are significant opportunities to improve the performance of Na secondary batteries by utilizing an IL electrolyte.…”

Section: 18mentioning

confidence: 99%

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte

Chen

Matsumoto

Hagiwara

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

Na 1.56 Fe 1.22 P 2 O 7 was synthesized via a conventional solid-state method and evaluated as a positive electrode for Na secondary batteries using Na [FSA]-[C 3 C 1 pyrr][FSA] (C 3 C 1 pyrr = N-methyl-N-propylpyrrolidinium and FSA = bis(fluorosulfonyl)amide) ionic liquids (IL) as electrolytes, over the temperature range of 298-363 K. A reversible capacity as high as 108 mAh g -1 has been achieved for the first time with a thermally stable IL at 363 K. This value is close to the theoretically calculated capacity of 118 mAh g −1 and is significantly higher than the previously reported values of ca. 85 mAh g −1 in organic electrolytes at 298 K. The capacity of 108 mAh g −1 also exceeds the value obtained for Na 2 FeP 2 O 7 electrodes (94 mAh g −1 ) under the same experimental conditions. Moreover, excellent rate capability and superior cyclability exceeding 3000 cycles have been achieved by using the IL electrolyte over a wide temperature range of 298-363 K. Recently, it has been recognized that Na secondary batteries can offer a performance comparable to that of Li batteries, at a more reasonable cost.1,2 Developing commercial Na secondary batteries that are economically viable, safe, and have a long life will definitely require the development of new electrode materials and electrolytes. Layered oxides in the form of Na x MO 2 (where M is a transition metal) have been extensively tested as Na host materials, 4-8 and some of the oxides have exhibited considerably high Na storage capacities by suitably tailoring the stoichiometric ratio of Na to M.6-8 However, most of these materials undergo complicated phase transitions during cycling 4-6 and may result in limited cyclability, 5-7 which is an obstacle for practical applications. 8In order to overcome such limitations in electrode performance, phosphate-based framework materials have been proposed as positive electrode materials in Na secondary batteries. [9][10][11][12][13][14][15][16] The robust framework undergoes a topotactic Na insertion/extraction reaction with a small volume change upon electrochemical cycling. Among them, pyrophosphates (Na 2 MP 2 O 7 , where M = Fe, Mn, or Co) have attracted interest owing to their favorable electrochemical activity and good thermal stability.10-16 However, they are less appealing in terms of theoretical capacity (ca. 97 mAh g −1 , 1 Na per formula unit) as compared to layered oxides (ca. 120 mAh g −1 , 0.5 Na per formula unit), owing to the presence of the P 2 O 7 units that induce a weight penalty.Recently, Na 2-x Fe 1+x/2 P 2 O 7 compounds (where, 0 < x < 0.44) were synthesized and evaluated as positive electrodes for Na secondary batteries using organic electrolytes at room temperature. 17,18The substitution of Na with Fe would directly influence the active Na sites and the coordination environment of the redox center, resulting in distinct electrochemical characteristics. Notably, the theoretical capacity for the extreme stoichiometric composition, Na 1.56 Fe 1.22 P 2 O 7 (x = 0.44), is estimated to be increased to ...

show abstract

Section: 18mentioning

confidence: 99%

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte

Chen

Matsumoto

Hagiwara

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…In another case, a thermally stable and nonflammable blendedsalt electrolyte based on the ionic liquid (IL) butylmethylpyrrolidinium bis(trifluoromethanesulfonyl)imide (BMP-TFSI) and 0.4 m LiTFSI/0.6 m LiPF 6 was designed to improve the performance of high-voltage (5 V class) LiNi 0.5 Mn 1.5 O 4 /Li cells, especially at 50 8C. [59] In that report, it was also revealed that the introduction of LiPF 6 helped suppress Al pitting corrosion by forming passive AlF 3 at elevated temperature.…”

Section: Role Of Lipf 6 In Inhibiting Aluminum-foil Corrosion Caused mentioning

confidence: 99%

Formulation of Blended‐Lithium‐Salt Electrolytes for Lithium Batteries

et al. 2019

View full text Add to dashboard Cite

Blended‐salt electrolytes showing synergistic effects have been formulated by simply mixing several lithium salts in an electrolyte. In the burgeoning field of next‐generation lithium batteries, blended‐salt electrolytes have enabled great progress to be made. In this Review, the development of such blended‐salt electrolytes is examined in detail. The reasons for formulating blended‐salt electrolytes for lithium batteries include improvement of thermal stability (safety), inhibition of aluminum‐foil corrosion of the cathode current collector, enhancement of performance over a wide temperature range (or at a high or low temperature), formation of favorable interfacial layers on both electrodes, protection of the lithium metal anode, and attainment of high ionic conductivity. Herein, we highlight key scientific issues related to the formulation of blended‐salt electrolytes for lithium batteries.

show abstract

“…B. Tetrahydrofuran (THF) und Dimethoxyethan (DME)) mit einer geringen Dielektrizitätskonstante; Entwicklung des neuen Salzes LiN(SO 2 C 2 F 5 ) 2 mit einem größeren Anion als LiTFSI. In einem anderen Fall wurde ein thermisch stabiler und nicht entzündbarer Gemischtsalz‐Elektrolyt auf Basis der ionischen Flüssigkeit Butylmethylpyrrolidiniumbis(trifluormethansulfonyl)imid (BMP‐TFSI) und 0.4 m LiTFSI/0.6 m LiPF 6 zur Verbesserung der Leistung von LiNi 0.5 Mn 1.5 O 4 /Li‐Zellen mit hoher Spannung (5‐V‐Klasse), besonders bei 50 °C, entwickelt . Aufgezeigt wurde in diesem Bericht auch das Einbringen von LiPF 6 , um die Unterdrückung der Lochfraßkorrosion von Aluminium durch Bildung von passivem AlF 3 bei erhöhter Temperatur zu unterstützen.…”

Section: Gemischtsalz‐elektrolyte Für Die Li‐ionen‐batterieunclassified

“…Es wird erwartet, dass die thermische Stabilität (Sicherheit) eines auf LiPF 6 beruhenden Elektrolyten durch das Einbringen von thermisch stabilen Lithiumhauptleitsalzen (wie LiBOB, LiPF 3 (CF 2 CF 3 ) 3 (LiFAP), LiBF 4 , Lithiumtetrafluoro(oxalato)phosphat (LiPF 4 (C 2 O 4 ), LiF 4 OP), LiDFOB, LiTFSI und LiFSI) in den Elektrolyten verbessert wird. Die Ergebnisse der Accelerating Rate Calorimetry (ARC) von Dahn et al.…”

Section: Gemischtsalz‐elektrolyte Für Die Li‐ionen‐batterieunclassified

Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Shangguan

Dong

et al. 2019

Angewandte Chemie

View full text Add to dashboard Cite

Durch einfaches Mischen verschiedener Lithiumsalze im Elektrolyten werden Gemischtsalz‐Elektrolyte formuliert, um einen synergistischen Effekt zu bewirken. Auf dem Gebiet der Lithium‐Batterien der nächsten Generation wurden große Fortschritte mit Gemischtsalz‐Elektrolyten erzielt. In diesem Aufsatz wird die Entwicklung derartiger Gemischtsalz‐Elektrolyten näher ausgeführt. Die Ziele der Formulierung von Gemischtsalz‐Elektrolyten für Lithium‐Batterien werden zusammengefasst: Verbesserung der thermischen Stabilität (Sicherheit), Verhindern der Korrosion der Aluminiumfolie des Kathoden‐Stromkollektors, Steigerung der Leistung über einen breiten Temperaturbereich (oder bei niedrigen oder hohen Temperaturen), Bildung günstiger Grenzflächenschichten an beiden Elektroden, Schützen der Lithium‐Metall‐Anode, Erreichen einer hohen Ionenleitfähigkeit usw. Darüber hinaus diskutieren wir wesentliche Aspekte bei der Formulierung von Gemischtsalz‐Elektrolyten für Lithium‐Batterien.

show abstract

Ionic liquid electrolytes for high-voltage rechargeable Li/LiNi0.5Mn1.5O4 cells

Cited by 28 publications

References 35 publications

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte

Formulation of Blended‐Lithium‐Salt Electrolytes for Lithium Batteries

Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Contact Info

Product

Resources

About

Ionic liquid electrolytes for high-voltage rechargeable Li/LiNi0.5Mn1.5O4 cells

Cited by 28 publications

References 35 publications

Full Utilization of Superior Charge-Discharge Characteristics of Na1.56Fe1.22P2O7Positive Electrode by Using Ionic Liquid Electrolyte

Full Utilization of Superior Charge-Discharge Characteristics of Na1.56Fe1.22P2O7Positive Electrode by Using Ionic Liquid Electrolyte

Formulation of Blended‐Lithium‐Salt Electrolytes for Lithium Batteries

Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Contact Info

Product

Resources

About

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte

Full Utilization of Superior Charge-Discharge Characteristics of Na_1.56Fe_1.22P₂O₇Positive Electrode by Using Ionic Liquid Electrolyte