Effect of ionic liquid 1-butyl-3-methylimidazolium bromide on ionic conductivity of poly(ethyl methacrylate) based polymer electrolytes

Francis, K.; Liew, Chiam–Wen; Ramesh, S.; Ramesh, K.

doi:10.1166/mex.2016.1307

Cited by 14 publications

(7 citation statements)

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“…To enhance the ion activity in the electrolyte, we employed BMI-Br, an OIPC type, and expected an amide and bromine interaction with PEO. [46,47] Lithium salt and BMI-Br solid plasticizer were added to the PEO matrix, and the CPE was obtained through drying. The moisture sensitivity of BMI-Br required conducting all procedures in a glove box.…”

Section: Resultsmentioning

confidence: 99%

Functionality of 1‐Butyl‐2,3‐Dimethylimidazolium Bromide (BMI‐Br) as a Solid Plasticizer in PEO‐Based Polymer Electrolyte for Highly Reliable Lithium Metal Batteries

Kim,

Jamal,

Jeon

et al. 2023

Advanced Energy Materials

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To address the challenges associated with solid polymer electrolytes, flame‐retardant organic ionic plastic crystals (OIPCs) have been utilized as a solid plasticizer in composite polymer electrolytes (CPEs). In this study, 1‐butyl‐2,3‐dimethylimidazolium bromide (BMI‐Br) is used as an OIPC material. BMI‐Br and LiTFSI are initially mixed in an acetonitrile (ACN) organic solvent for a certain time. Anion exchange takes place in this mixing, replacing the Br− in BMI‐Br with TFSI−. As a result, BMI‐TFSI and Li‐Br are formed. Here, BMI‐TFSI acts as an ionic liquid, while Li‐Br serves as a salt. The 10% BMI‐Br content (BMI‐Br‐10 CPE) exhibits significant ionic conductivity (σ = 2.34 × 10−3 S cm−1 at 30 °C), wide window (up to 4.57 V), and flame retardancy. Furthermore, the BMI‐Br‐10 CPE demonstrates galvanostatic lithium plating stripping cycling stability at 100 and 300 µA cm−2 for 800 and 500 h against Li‐metal, respectively, without a significant overpotential shooting. Furthermore, at 60 °C, the BMI‐Br‐10 CPE in [LiFePO4/BMI‐Br‐10/Li] batteries demonstrates an initial capacity of 146.9 mAh g−1, capacity retention of 99.7% and high coulombic efficiency (99.5%) after 300 cycles at 1C.

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Section: Resultsmentioning

confidence: 99%

Functionality of 1‐Butyl‐2,3‐Dimethylimidazolium Bromide (BMI‐Br) as a Solid Plasticizer in PEO‐Based Polymer Electrolyte for Highly Reliable Lithium Metal Batteries

Kim,

Jamal,

Jeon

et al. 2023

Advanced Energy Materials

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“…Differential scanning calorimetry (DSC) thermogram (Figure d) showed that all SPEs have considerably lower T g than their polymer counterparts. This observation means that adding Li salt intercalates the already loosely packed chain and makes it more amorphous with increased chain flexibility . Presence of Li salt reduces the crystallinity of the polymer making it amorphous, chains become more flexible and provides additional free volume for chain motion.…”

Section: Results and Discussionmentioning

confidence: 99%

“…This observation means that adding Li salt intercalates the already loosely packed chain and makes it more amorphous with increased chain flexibility. 46 Presence of Li salt reduces the crystallinity of the polymer making it amorphous, chains become more flexible and provides additional free volume for chain motion. Within the SPEs of the same polyphosphate, the T g increased with the increasing Li-ion content.…”

Section: Solid Polymer Electrolytes (Spes)mentioning

confidence: 99%

2D-Channel-Forming Catechol-Based Polyphosphates as Solid Polymer Electrolytes and Their Microstructure-Assisted Li-Ion Conductivity

Srinivas

Othayoth

Babu

et al. 2023

ACS Appl. Energy Mater.

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Electrochemical energy storage devices are the much-required technology for potential applications in renewable energy systems from intermittent wind and solar sources and portable applications in electric vehicles. This paper describes the synthesis, characterization, and Li-ion conductivity of catechol-based copolymer of polyphosphates (P1–P4) for solid polymer electrolyte (SPE) applications in Li-ion batteries. The synthesized polymers are thermally stable with a high molecular weight and porous nature and their particles have a rodlike morphology. The Li-ion conductivity of one of the SPEs produced using P3 with 20 wt % of LiTFSI is 1.4 × 10–3 S cm–1 at 80 °C, while P1 having 40 wt % of LiTFSI shows the conductivity of 1.2 × 10–3 S cm–1 at 80 °C. The remaining polymers (P1–P4) show good conductivity at room temperature (∼10–4 S cm–1). The results demonstrate the highest Li-ion conductivity among those reported in the literature so far at 80 °C. The high conductivity achieved is attributed to the microstructure of polymer molecules dictated by the bulky and rigid groups as a co-monomer, which creates perpetual voids in the polymer matrices. Galvanostatic charge–discharge cycling studies on the coin cells fabricated using SPE1 exhibit constant overpotential values and stable cycling behavior for about 2000 cycles.

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“…Studies of the physicochemical properties of 1-alkyl-3-methylimidazolium ionic liquids have found that the viscosity of RTILs increases with the alkyl chain length due to the strengthening of the van der Waals forces. 106 (3) Increasing the operating temperature. The ionic mobility of ionic liquids is usually related to temperature.…”

Section: Non-aqueous Electrolytesmentioning

confidence: 99%

Electrolytes for aluminum–air batteries: advances, challenges, and applications

Zhao

et al. 2023

Sustainable Energy Fuels

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Effect of ionic liquid 1-butyl-3-methylimidazolium bromide on ionic conductivity of poly(ethyl methacrylate) based polymer electrolytes

Cited by 14 publications

References 0 publications

Functionality of 1‐Butyl‐2,3‐Dimethylimidazolium Bromide (BMI‐Br) as a Solid Plasticizer in PEO‐Based Polymer Electrolyte for Highly Reliable Lithium Metal Batteries

Functionality of 1‐Butyl‐2,3‐Dimethylimidazolium Bromide (BMI‐Br) as a Solid Plasticizer in PEO‐Based Polymer Electrolyte for Highly Reliable Lithium Metal Batteries

2D-Channel-Forming Catechol-Based Polyphosphates as Solid Polymer Electrolytes and Their Microstructure-Assisted Li-Ion Conductivity

Electrolytes for aluminum–air batteries: advances, challenges, and applications

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