Synthesis and electrochemical performance of an imidazolium based Li salt as electrolyte with Li fluorinated sulfonylimides as additives for Li-Ion batteries

Ahmed, Faiz; Rahman, Md. Mahbubur; Sutradhar, Sabuj Chandra; Lopa, Nasrin Siraj; Ryu, Taewook; Yoon, Seok Ho; Choi, Inhwan; Lee, Yonghoon; Kim, Whangi

doi:10.1016/j.electacta.2019.02.040

Cited by 17 publications

(26 citation statements)

References 51 publications

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“…The weight loss (ca. 12%) up to 210 °C in the first step can be ascribed to the loss of physiosorbed water molecules and the incorporation of LiFSI, which is consistent with the reported work [ 25 , 28 ]. Then, all SPEs experienced a sharp weight loss up to 500 °C, and the weight losses of SPE-3, SPE-2.5, and SPE-2 were ca.…”

Section: Resultssupporting

confidence: 92%

“…960 cm −1 ( Figure 2 b,c), which can be attributed to the functional group -C-O-C [ 24 ] indicating the successful polymerization of poly (EOM). The broad peaks in the range of 3100–3700 cm −1 for all electrolytes indicate the presence of H-bonded N anions along with the trace amounts of physiosorbed water molecules [ 25 ]. SPEs also displayed the main peaks of -CH 3 and -CH 2 stretching at 2962 and 2882 cm −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

et al. 2022

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Rechargeable lithium-ion batteries have drawn extensive attention owing to increasing demands in applications from portable electronic devices to energy storage systems. In situ polymerization is considered one of the most promising approaches for enabling interfacial issues and improving compatibility between electrolytes and electrodes in batteries. Herein, we observed in situ thermally induced electrolytes based on an oxetane group with LiFSI as an initiator, and investigated structural characteristics, physicochemical properties, contacting interface, and electrochemical performances of as-prepared SPEs with a variety of technologies, such as FTIR, 1H-NMR, FE-SEM, EIS, LSV, and chronoamperometry. The as-prepared SPEs exhibited good thermal stability (stable up to 210 °C), lower activation energy, and high ionic conductivity (>0.1 mS/cm) at 30 °C. Specifically, SPE-2.5 displayed a comparable ionic conductivity (1.3 mS/cm at 80 °C), better interfacial compatibility, and a high Li-ion transference number. The SPE-2.5 electrolyte had comparable coulombic efficiency with a half-cell configuration at 0.1 C for 50 cycles. Obtained results could provide the possibility of high ionic conductivity and good compatibility through in situ polymerization for the development of Li-ion batteries.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

et al. 2022

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“…Additionally, the composition of electrolytes is calculated and designed accordance with simplex method. [19][20][21][22]…”

Section: Preparation Of Electrolytementioning

confidence: 99%

Optimizing the composition of LiFSI-based electrolytes by a method combining simplex with normalization

Zeng

Zhao

et al. 2021

RSC Adv.

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“…[ 50 ] The above results imply that in situ polysiloxane‐epoxy polymer electrolytes can offer promising thermal stability, which is satisfied with the normal operation range of −40 to 85 °C of LIBs. [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

An In Situ Polymeric Electrolyte with Low Interfacial Resistance on Electrodes for Lithium‐Ion Batteries

Jin

Jang

Lim

et al. 2021

Adv Materials Inter

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Due to their high energy density and safety, polymer electrolytes are considered a promising alternative to the commercial liquid electrolytes used in lithium‐ion batteries (LIBs). However, in practical application, polymer electrolytes are limited by the high interface resistance between electrodes and electrolyte, leading to low ionic conductivity at room temperature (RT). In the present work, an in situ cationic ring‐opening technique is introduced using LiFSI as an initiator to address the issue of interfacial contact between electrolyte and electrodes in LIBs. Herein, a series of in situ poly(siloxane‐epoxy)‐based polymer electrolytes (PSEPEs) are synthesized, which present good thermal stability (158 °C), low glass transition temperature (Tg) (−42 °C), high ionic conductivity of 1.16 × 10–4 S cm–1, and good tLi+ of 0.61 at RT. The PSEPEs also show a wide electrochemical window (>4.7 V vs Li/Li+), and excellent compatibility with the lithium anode with an assembled LiFePO4/ PSEPEs /Li cell. This work contributes to developing a new polymer electrolyte fabricated by in situ cationic polymerization, and its effects on the reduction of the interfacial resistance of electrodes–electrolyte.

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Synthesis and electrochemical performance of an imidazolium based Li salt as electrolyte with Li fluorinated sulfonylimides as additives for Li-Ion batteries

Cited by 17 publications

References 51 publications

Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

Optimizing the composition of LiFSI-based electrolytes by a method combining simplex with normalization

An In Situ Polymeric Electrolyte with Low Interfacial Resistance on Electrodes for Lithium‐Ion Batteries

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