LiFePO4 cathode in N-methyl-N-propylpiperidinium and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide

Lewandowski, Andrzej; Acznik, Ilona; Swiderska‐Mocek, Agnieszka

doi:10.1007/s10800-010-0147-1

Cited by 12 publications

(7 citation statements)

References 32 publications

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“…The cell with the GBL-modified RTIL electrolyte performed better than that containing the VC-modified RTIL electrolyte. The above results confirmed the addition of VC or GBL could enhance the SEI formation, which gives a better charge rate capability for the cell [8,14,15].…”

Section: Battery Performancementioning

confidence: 53%

“…Room temperature ionic liquids (RTILs) that consist of only cations and anions are non-volatile, non-flammable, and have high thermal stability, which makes them promising for application as electrolytes [3,4]. These new electrolytes can be combined electrodes such as lithium iron phosphate (LiFePO 4 ), which has a high theoretical capacity, low cost, and low environmental impact [5][6][7].Li/LiFePO 4 cells with RTILs-based electrolytes (flash point is >300°C) show good efficiency [8]. Unfortunately, RTILs-based electrolytes exhibit higher viscosity, lower conductivity and reduced compatibility with electrodes compared to conventional organic electrolytes, and this leads to relatively poor cell performance [9,10].…”

mentioning

confidence: 99%

“…Li/LiFePO 4 cells with RTILs-based electrolytes (flash point is >300°C) show good efficiency [8]. Unfortunately, RTILs-based electrolytes exhibit higher viscosity, lower conductivity and reduced compatibility with electrodes compared to conventional organic electrolytes, and this leads to relatively poor cell performance [9,10].…”

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confidence: 99%

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Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte

et al. 2011

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A new guanidinium-based ionic liquid (IL) was investigated as a novel electrolyte for a lithium rechargeable battery. The viscosity, conductivity, lithium redox behavior, and charge-discharge characteristics of the lithium rechargeable batteries were investigated for the IL electrolyte with 0.3 mol kg −1 lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. Li/ LiFePO 4 cells incorporating the IL electrolyte without additives showed good cycle properties at a charge-discharge current rate of 0.1 C, and exhibited good rate capabilities in the presence of a mass fraction of 10% vinylene carbonate or gamma-butyrolactone. The popularity of lithium rechargeable batteries has increased over the last two decades because of the demand for portable energy storage devices. Conventional organic electrolytes used in lithium rechargeable batteries are composed of organic solvents and inorganic salts. These batteries have a working temperature range from −20-50°C, which restricts the applications for lithium rechargeable batteries. There are also safety concerns over the organic solvents, which are volatile and flammable with flash points mostly below 30°C [1,2]. To overcome these, new and safe electrolytes need to be developed. Room temperature ionic liquids (RTILs) that consist of only cations and anions are non-volatile, non-flammable, and have high thermal stability, which makes them promising for application as electrolytes [3,4]. These new electrolytes can be combined electrodes such as lithium iron phosphate (LiFePO 4 ), which has a high theoretical capacity, low cost, and low environmental impact [5][6][7].Li/LiFePO 4 cells with RTILs-based electrolytes (flash point is >300°C) show good efficiency [8]. Unfortunately, RTILs-based electrolytes exhibit higher viscosity, lower conductivity and reduced compatibility with electrodes compared to conventional organic electrolytes, and this leads to relatively poor cell performance [9,10]. To resolve these problems, some organic additives such as ethylene carbonate and vinylene carbonate (VC) have been added to obtain a stable solid electrolyte interface (SEI) on the electrode [11][12][13][14][15].Recently, our group [16] synthesized a series of hydrophobic RTILs based on small guanidinium cations and the bis(trifluoromethanesulfonyl)imide (TFSI) anion. Both 1g13-TFSI (N-methyl-N-propyl-N′,N′,N″,N″-tetramethylguanidinium-TFSI) and 1g22TFSI (N,N-diethyl-N′,N′,N″,N″-tetramethylguanidinium-TFSI) could be used as electrolytes for Li/LiCoO 2 lithium rechargeable batteries [17]. Although the cells with guanidinium-based electrolytes had good capacities, they exhibited unfavorable cycle properties. In this study, a new guanidinium RTIL, 1g14TFSI (Figure 1), was investigated as a novel electrolyte for Li/LiFePO 4 lithium rechargeable batteries. Both VC and gamma-butyrolactone (GBL) were investigated as additives to the 1g14TFSI-based electrolyte, and their influence on electrochemical performance was studied using charge-discharge tests.

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Section: Battery Performancementioning

confidence: 53%

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confidence: 99%

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Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte

et al. 2011

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“…4d). Comparative performance of the coin cell Table 2 [16,21,32,[38][39][40][41][42]. Figure 5a explains the ten consecutive cycles (cycled between 2.5 and 0.010 V) of CVs for the MCMB electrode in IL electrolyte at a scan rate of 0.2 mV s −1 [43].…”

Section: Charge-discharge Characteristicsmentioning

confidence: 99%

“…Among the different cathode materials, olivine structured transition metal phosphates, such as LiFePO 4 (LFP), have gained much attention due to its cost effectiveness, high theoretical capacity, non-toxicity, thermal, chemical as well as electrochemical stability, high cycling stability and flat voltage plateau [20,21]. Further, graphitic carbon is widely used as a host anode due to its outstanding features such as low cost; good lithium intercalation/de-intercalation process; high thermal, chemical and electrochemical stability as well as low working potential vs. lithium [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric tetraalkyl ammonium cation-based ionic liquid as an electrolyte for lithium-ion battery applications

Selvamani

Suryanarayanan

Velayutham

et al. 2016

J Solid State Electrochem

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Performance of N-butyl N,N,N-triethylammonium bis(trifluoromethanesulfonyl)-imide (N 2224 TFSI) as a room temperature ionic liquid (RTIL) containing ethylene carbonate (EC)/diethylcarbonate (DEC) and lithium salt has been investigated as an electrolyte for lithium-ion battery. The electrolyte is highly resistant to fire during direct exposure to the flame, indicating its non-flammable nature. The overall electrochemical window of the ionic liquid (IL) electrolyte is up to 5.7 V vs. Li metal without any solvent decomposition, as confirmed by linear sweep voltammetry (LSV). The electrolyte has low viscosity (32.9 cPs) and high conductivity (5.23 mS cm −1 ) with effective SEI film-forming ability. The performance of the IL electrolyte has been tested with lithium-ion half cells using LiFePO 4 and mesocarbon microbead (MCMB) electrodes, showing good galvanostatic cycling with high capacity retention of about 84 and 90 %, respectively.

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Ionogel‐Based Membranes for Safe Lithium/Sodium Batteries

Wang

Jiang

2022

Advanced Materials

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Alkali (lithium, sodium)‐based second batteries are considered one of the brightest candidates for energy‐storage applications in order to utilize the random and intermittent renewable energy to achieve carbon neutrality. Conventional lithium/sodium batteries containing liquid organic electrolytes are vulnerable to electrolytes leakage and even combustion, which hinders their large‐scale and reliable application. All‐solid‐state electrolytes which are considered to have better safety have been developed in recent years. However, most of them suffer from low ionic conductivity and large interfacial resistance with the electrode. Ionogel‐electrolyte membranes composed of ionic liquids and solid matrices, have attracted much attention because of their nonvolatility, nonflammability, and superior chemical and electrochemical properties. This review focuses on the most recent advances of ionogel electrolytes that sprang up with the emerging demand and progress of safe lithium/sodium batteries. The ionogel‐electrolyte membranes are discussed based on the framework components and preparation methods. Their structure and properties, including ionic conductivity, mechanical strength, electrochemical stabilities, and so on, are demonstrated in combination with their applications. The current challenges and insights on the future development of ionogel electrolytes for advanced safe lithium/sodium batteries are also proposed.

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LiFePO4 cathode in N-methyl-N-propylpiperidinium and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide

Cited by 12 publications

References 32 publications

Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte

Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte

Asymmetric tetraalkyl ammonium cation-based ionic liquid as an electrolyte for lithium-ion battery applications

Ionogel‐Based Membranes for Safe Lithium/Sodium Batteries

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