Brønsted acid–base ionic liquids for fuel cell electrolytes

Nakamoto, Hirofumi; Watanabe, Masayoshi

doi:10.1039/b618953a

Cited by 340 publications

(340 citation statements)

References 21 publications

(36 reference statements)

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“…The synthesis of MimS, which is similar to the synthesis of other protic ionic liquids, [28][29][30][31] and its polymerization are shown in Scheme 1.…”

Section: Synthesis Of Mims and The Preparation Of Model Compounds Witmentioning

confidence: 99%

SBR/silica composites modified by a polymerizable protic ionic liquid

Lei

Tang

Guo

et al. 2010

Polym J

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A novel functionalized ionic liquid, 1-methylimidazolium sorbate (MimS), was synthesized and characterized. MimS was used to improve the performance of rubber/silica composites. Substantiated hydrogen bonding between MimS and silica was responsible for effectively restraining the Payne effect and decreasing the Mooney viscosity of the uncured rubber compounds. The reactivity of MimS toward rubber and its ability to hydrogen bond with polymerized MimS and silica were characterized. Filler networking, curing behavior, silica dispersion and mechanical performance of the vulcanizates were fully studied. Remarkable improvements in mechanical properties were achieved with only a small addition of MimS. Variations in rubber performance were attributed to the significantly improved silica dispersion and novel interfacial interactions induced by MimS.

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“…The synthesis of MimS, which is similar to the synthesis of other protic ionic liquids, [28][29][30][31] and its polymerization are shown in Scheme 1.…”

Section: Synthesis Of Mims and The Preparation Of Model Compounds Witmentioning

confidence: 99%

SBR/silica composites modified by a polymerizable protic ionic liquid

Lei

Tang

Guo

et al. 2010

Polym J

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“…Consequently, designing functional ILs with special functional structure and economic rationality is of crucial importance in exploring novel interfacial modifier for rubber/filler composites. In a recent study, protic ILs could be high efficiently fabricated and their structure ccould be easily tailored with numerous commercially available raw materials such as Bronsted acids and bases [34][35][36][37][38]. In our previous work, a functional group was successfully induced into the anion of IL.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel functional liquid and its application as a modifier in SBR/silica composites

Lei¹,

Tang²,

Guo³

et al. 2010

Express Polym. Lett.

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Abstract.A novel functional ionic liquid (IL), 1-methylimidazolium methacrylate (MimMa), was synthesized for modifying styrene butadiene rubber (SBR)/silica composites. MimMa was found to be readily polymerized via the initiated radical mechanism and could be analogously grafted onto rubber chains during vulcanization. Substantial hydrogen bonding between polymerized MimMa (poly(MimMa)) and silica can facilitate the silica dispersion and improve the SBR/silica interfacial bonding. Filler networking, curing behavior, silica dispersion and mechanical performance of the modified SBR/silica composites were studied. With a low concentration of MimMa, remarkable improvements in the interfacial interactions and mechanical properties were achieved which was attributed to the improved silica dispersion and strengthened interfacial bonding induced by MimMa. A modified interphase structure was accordingly proposed and related to the mechanical performance of the modified SBR/silica composites.

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“…5). 56 It should be noted that HOR and ORR (especially ORR) at a Pt electrode in [dema][TfO] is facile, and the open circuit potential (OCP) of a liquid fuel cell using [dema][TfO] is greater than 1 V. The OCPs of liquid fuel cells formed using a variety of protic IL show a parabolic dependence, exhibiting a maximum at "pK a = 17-18, 57 and a similar parabolic OPC dependence has also been observed by other researchers. 58 Determining the relationship between the chemical structure of protic ILs and their bulk and electrochemical properties, especially ORR activity, is of great interest [59][60][61][62] and remains a challenge for the future.…”

confidence: 99%

Design and Materialization of Ionic Liquids Based on an Understanding of Their Fundamental Properties

Watanabe

2016

Electrochemistry

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Ionic liquids (ILs) are defined as salts that have melting points lower than 100°C. Most are organic salts, and these may be designed and tailored to have suitable properties. ILs are recognized as a third group of solvents (and electrolytes), after water and organic solvents. They are characterized by their unique properties such as nonvolatilities, high thermal stabilities, and high ionic conductivities. In this article, our work on the design and preparation of ILs is briefly reviewed. The concept of ionicity is proposed as a metric to characterize the basic nature (dissociativity) of ILs, which is affected by the Lewis acidity/basicity of cations/anions (i.e., coulombic interactions), the directionality of interactions between cations and anions, and van der Waals interactions between ions. The ionicity of ILs is dominated by a subtle balance between coulombic and van der Waals interactions, which clearly discriminates ILs from conventional high-temperature inorganic molten salts. Here, the design of protic ILs for fuel cell electrolytes, electron-transporting ILs for dye-sensitized solar cell electrolytes, and Li + -conducting solvate ILs for lithium battery electrolytes are discussed based on an understanding of the fundamental properties of ILs. Furthermore, the combination of ILs with polymers and colloidal particles affords intriguing quasi-solid materials (ion gels), and the ion transport in these gels is decoupled from the mechanical relaxation time of these materials, yielding new solid electrolytes. The possibility of temperature and photo-sensitive solubility dependence of polymers in ILs allows the creation of stimuli-responsive materials. Finally, protic ILs/protic salts are demonstrated to be good precursors for N-doped carbon materials.

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Brønsted acid–base ionic liquids for fuel cell electrolytes

Cited by 340 publications

References 21 publications

SBR/silica composites modified by a polymerizable protic ionic liquid

SBR/silica composites modified by a polymerizable protic ionic liquid

Synthesis of novel functional liquid and its application as a modifier in SBR/silica composites

Design and Materialization of Ionic Liquids Based on an Understanding of Their Fundamental Properties

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