Synthesis and properties of polymerized ionic liquids

Eftekhari, Ali; Saito, Tomonori

doi:10.1016/j.eurpolymj.2017.03.033

Cited by 173 publications

(111 citation statements)

References 338 publications

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“…[98] It should be kept in mind that Figure 3. [100,101] Owing to the ionic nature of these ionic organic salts, they are prone to contamination particularly moisture, which should be strictly avoided for the LIB applications. The CV is conducted in gel-waterin-bisalt (working electrode, WE) with a Ag/AgCl reference electrode (RE) and active carbon counter electrode (CE).…”

Section: Water-in-saltmentioning

confidence: 99%

High‐Energy Aqueous Lithium Batteries

Eftekhari¹

2018

Advanced Energy Materials

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146

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research, aqueous electrolytes were occasionally employed for the investigation of cathode materials instead of the conventional nonaqueous electrolytes. [9,10] It was discussed that the simplicity of an aqueous electrolyte provides a better opportunity for the fundamental studies of the process of intercalation/deintercalation of Li-ions as opposed to the nonaqueous electrolytes. For instance, although the formation of solid electrolyte interphase (SEI) is of utmost importance for the cyclability of LIB, the significant role of the electrolyte does not allow to exclusively study the electrochemical behavior of the electrode material under consideration. The current research has specifically targeted the development of ARLBs, but in practice, most of the recent papers have followed the same line of research in investigating a limited range of cathode and anode materials in the same aqueous electrolytes. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] A possible reason is that the key advantage of ARLBs was low cost, and thus, the focus was limited to a few inexpensive materials (e.g., lithium salts). Aqueous electrolytes are definitely excellent choices for the fundamental studies of electrode materials, but the practical development of ARLBs needs overcoming the key obstacles rather than finding more cathode materials.In any case, aqueous electrolytes were occasionally used during the 2000s by various research groups, but there was no vivid plan for the development of ARLBs. These works have been extensively reviewed before, [29][30][31][32][33] and it is not aimed to repeat the general works on aqueous electrolytes here. During the recent years, new opportunities have been introduced, which can extend the stable potential window of aqueous electrolyte to the range of 3-4 V. Upon this advancement, aqueous electrolytes can fairly compete with the conventional nonaqueous electrolytes for the fabrication of cheaper and safer LIBs. On the other hand, novel designs such as self-healing [34] or flexible [16,35,36] ARLBs have paved the path for new practical potentials of aqueous electrolytes. The present paper specifically focuses on the recent advancements and attempts to foster the strategy of research to shed light on the pathway of this emerging area of research. Two factors are directly responsible for achieving a high energy density, the specific capacity, and the cell voltage. Since the former is not massively controlled by the electrolyte and the specific capacity of most electroactive Owing to the high voltage of lithium-ion batteries (LIBs), the dominating electrolyte is non-aqueous. The idea of an aqueous rechargeable lithium battery (ARLB) dates back to 1994, but it had attracted little attention due to the narrow stable potential window of aqueous electrolytes, which results in low energy density. However, aqueous electrolytes were employed during the 2000s for the fundamental studies of electrode materials in the absence of side reactions such as the decomposition of organic spec...

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Section: Water-in-saltmentioning

confidence: 99%

High‐Energy Aqueous Lithium Batteries

Eftekhari¹

2018

Advanced Energy Materials

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146

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Section: Dielectric Characteristics Of the Suspensions Of P[mtma][tfsmentioning

confidence: 99%

“…Recently, poly(ionic liquid)s or polymerized ionic liquids (PILs), as a new type of functional polyelectrolytes, have attracted rapidly increasing interest in the fields of polymer and material science . Because ionic liquid (IL) functionalities are directly incorporated into the macromolecular structures, these systems possess both the functional properties of ionic liquids (e.g., high ionic conductivity, wide electrochemical window, negligible vapor pressure, nonflammability, and good chemical and thermal stability) and the flexibility and mechanical strength of macromolecules . This combined properties make PILs show potential not only in obvious applications such as electrolytes for batteries and supercapacitors, but also where immobilization of active ingredients and their subsequent release in controlled fashion is desired, such as in drug delivery, agriculture, and biomedical fields …”

Section: Dielectric Characteristics Of the Suspensions Of P[mtma][tfsmentioning

confidence: 99%

Low‐Temperature Interfacial Polymerization and Enhanced Electro‐Responsive Characteristic of Poly(ionic liquid)s@polyaniline Core‐shell Microspheres

Chen

Liu

Dong

et al. 2018

Macromol. Rapid Commun.

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The synthesis of monodisperse poly(ionic liquid)s (PILs) microspheres coated with semiconducting polyaniline (PANI) shell is reported, which shows enhanced electro-responsive electrorheological (ER) effect but decreased power consumption compared to neat PIL microspheres. The monodisperse PIL microspheres are first prepared via dispersion polymerization and then PANI is coated via low-temperature interfacial polymerization of aniline on the surface of hydrophobic PIL microspheres without additional modification. The stimulus-responsive ER effect of the core-shell microspheres when dispersing in insulating oil are investigated under electric fields. The power-law of yield stress versus electric field strength and the dielectric relaxation spectroscopy are analyzed to understand the ER effect and the origin of property enhancement. It demonstrates that the semiconducting PANI shell can well limit the irreversible ion leakage of PIL microspheres and improve the particle polarizability, resulting in decreased power consumption but enhanced electro-responsive ER effect.

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“…The second is polymeric ionic liquids (PILs), which are synthesized by polymerization of ionic liquid monomers . As a new family of polymer materials, PILs combine the unique features of ionic liquids with a macromolecular structure, and reveal attractive properties, such as good film forming ability, tunable solubility, high thermal stability and good electrochemical performance . Ohno et al.…”

Section: Introductionmentioning

confidence: 99%

Polymeric Ionic Liquid‐poly(ethylene glycol) Composite Polymer Electrolytes for High‐Temperature Lithium‐Ion Batteries

Zhang

Yang

et al. 2017

ChemElectroChem

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A new family of composite polymer electrolytes (CPEs) is developed by blending pyrrolidinium‐based polymeric ionic liquid [P(DADMA)TFSI], poly(ethylene glycol) [PEG800], and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI). The structure, thermal behavior, electrochemical properties of these CPEs, as well as their potential application in high‐temperature lithium‐ion batteries (LIBs) are studied. The FTIR result reveals the interactions among P(DADMA)TFSI, PEG800, and Li+ cations. X‐ray diffraction and differential scanning calorimetry measurements show that the as‐prepared CPEs have amorphous structures. Furthermore, CPEs exhibit satisfactory ionic conductivity, as well as high thermal and electrochemical stabilities. In addition, Li/LiFePO4 cells with the as‐prepared CPE at 0.2C rate can achieve a discharge capacity of about 150 mA h g−1 at 80oC, with good capacity retention. These findings indicate that the as‐obtained CPEs have great potential for applications as safe electrolytes in high‐temperature LIBs.

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Synthesis and properties of polymerized ionic liquids

Cited by 173 publications

References 338 publications

High‐Energy Aqueous Lithium Batteries

High‐Energy Aqueous Lithium Batteries

Low‐Temperature Interfacial Polymerization and Enhanced Electro‐Responsive Characteristic of Poly(ionic liquid)s@polyaniline Core‐shell Microspheres

Polymeric Ionic Liquid‐poly(ethylene glycol) Composite Polymer Electrolytes for High‐Temperature Lithium‐Ion Batteries

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