Molecular composite electrolytes of polybenzimidazole/polyethylene oxide with enhanced safety and comprehensive performance for all-solid-state lithium ion batteries

Huang, Hong; Liu, Tianmeng; Wang, Yan; Yu, Junrong; Hu, Zuming

doi:10.1016/j.polymer.2021.124450

Cited by 14 publications

(5 citation statements)

References 52 publications

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“…The microstructure of the pristine PEO/LiTFSI (P-OPF0) membrane reveals a wrinkled morphology, which can be explained to arise from a combined effect of solvent evaporation during the drying process and the presence of crystallization in the pristine electrolyte material. − The uneven, wrinkled surface leads to insufficient contact of SPE with the electrodes and results in poor performance. After addition of OPF to PEO/LiTFSI, initially, the SPE surface becomes smooth for P-OPF0.5 and P-OPF1, which indicates suppression of crystallization and uniform mixing of the OPF with the bulk polymer in which isolated aggregates are absent, as observed from the SEM images shown in Figure c,d.…”

Section: Resultsmentioning

confidence: 99%

Solid Polymer Electrolyte Based on an Ionically Conducting Unique Organic Polymer Framework for All-Solid-State Lithium Batteries

Bandyopadhyay

Gupta

Joshi

et al. 2023

ACS Appl. Energy Mater.

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Solid polymer electrolytes (SPEs) are regarded as a potential candidate for the development of all-solid-state lithium batteries minus the safety issues related to their liquid counterparts. Poly(ethylene oxide) (PEO)-based SPEs with strong capability to dissolve lithium salts have found extensive application in lithium batteries. However, the crystalline nature and propensity of lithium dendrite growth in such SPEs have led to the search for preemptive alternatives like the incorporation of inorganic nanoparticles or porous frameworks as fillers in the polymer matrix. Herein, a unique organic polymer framework (OPF) was synthesized by the Suzuki–Miyaura coupling reaction between 2,5-dibromo-3-(2-(2-(2-ethoxyethoxy)ethoxy)ethyl)thiophene and triazine-phenyl boronic acid. Interestingly, the incorporation of long ethylene glycol side chains in the polymer framework resulted in the amorphous nature of the OPF. Impressively, the percentage of crystallinity of PEO reduced significantly to only 30% in OPF-incorporated PEO/lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) composites. Further, the side chains present in a multidirectional manner acted as an interfacial compatibilizer aiding the homogeneous distribution of OPF in the PEO matrix. The SPE showed significantly improved ionic conductivity compared to the pristine samples (9.61 × 10–3 S cm–1 at 55 °C) and a lithium-ion transference number of 0.53. The performance of such SPE was further evaluated by assembling Li/LiFePO4 (LFP) coin cells, showing a stable discharge capacity of 130 mAh g–1 at 0.2C after 200 cycles. This work provides an interesting concept for building a unique type of homogeneous OPF/PEO-based composite SPE film that can be utilized as a desirable material in solid electrolytes for lithium battery applications.

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Section: Resultsmentioning

confidence: 99%

Solid Polymer Electrolyte Based on an Ionically Conducting Unique Organic Polymer Framework for All-Solid-State Lithium Batteries

Bandyopadhyay

Gupta

Joshi

et al. 2023

ACS Appl. Energy Mater.

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“…The composite materials are known for their high ionic conduction, and thermal and mechanical stability 139 . These materials are considered to be environment friendly, and successfully used to reduce safety hazards 140 . Nevertheless, there is some limitation for composites‐based electrolytes, including the complex structure of these electrolytes impedes their structural development toward high ionic conduction 141 .…”

Section: Solid‐state Electrolytesmentioning

confidence: 99%

Potential electrolytes for solid state batteries and its electrochemical analysis—A review

Zulfiqar

Abbas

et al. 2023

Energy Storage

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The main purpose of this review is to present comprehensive research on all solid‐state electrolytes in a single frame. In next‐generation rechargeable solid‐state batteries, the solid‐state electrolytes are well known for their thermal stability, ionic conduction, and electrochemical stability. Therefore, in scientific societies, the development of potential solid‐state electrolytes become a trending debate to enhance their cycling stability and electrochemical properties. Here, the recent development of all solid electrolytes (such as ceramic and structure‐based electrolytes) to enhance their electrochemical properties is summarized. From previous studies, the installation of solid electrolytes is hindered by the following factors electrode‐electrolyte interface, dendrite growth, and discharge capacity as well as its solutions are discussed. Additionally, advanced electrochemical characterization techniques such as electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charging and discharging used to evaluate the electrochemical behavior of electrolytes in the solid frame are summarized for the first time. Moreover, an up‐to‐date article on battery performance with potential electrolytes and some future perspectives also give a vivid image of the pragmatic applications of these batteries at the commercial level.

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“…Zhang et al developed a low-cost polybenzimidazole (PBI) and PEO composite electrolyte by using a simple and scalable hybrid method [38]. PBI is an aromatic heterocyclic polymer with excellent heat resistance, mechanical strength, chemical stability, and flameretardant properties, making it one of the best flame retardants for polymer electrolytes.…”

Section: Nitrogenous Flame Retardantsmentioning

confidence: 99%

Recent Progress in Flame-Retardant Polymer Electrolytes for Solid-State Lithium Metal Batteries

Liao,

Xu,

Luo

et al. 2023

Batteries

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Lithium-ion batteries (LIBs) have been widely applied in our daily life due to their high energy density, long cycle life, and lack of memory effect. However, the current commercialized LIBs still face the threat of flammable electrolytes and lithium dendrites. Solid-state electrolytes emerge as an answer to suppress the growth of lithium dendrites and avoid the problem of electrolyte leakage. Among them, polymer electrolytes with excellent flexibility, light weight, easy processing, and good interfacial compatibility with electrodes are the most promising for practical applications. Nevertheless, most of the polymer electrolytes are flammable. It is urgent to develop flame-retardant solid polymer electrolytes. This review introduces the latest advances in emerging flame-retardant solid polymer electrolytes, including Polyethylene oxide (PEO), polyacrylonitrile (PAN), Poly (ethylene glycol) diacrylate (PEGDA), polyvinylidene fluoride (PVDF), and so on. The electrochemical properties, flame retardancy, and flame-retardant mechanisms of these polymer electrolytes with different flame retardants are systematically discussed. Finally, the future development of flame-retardant solid polymer electrolytes is pointed out. It is anticipated that this review will guide the development of flame-retardant polymer electrolytes for solid-state LIBs.

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Molecular composite electrolytes of polybenzimidazole/polyethylene oxide with enhanced safety and comprehensive performance for all-solid-state lithium ion batteries

Cited by 14 publications

References 52 publications

Solid Polymer Electrolyte Based on an Ionically Conducting Unique Organic Polymer Framework for All-Solid-State Lithium Batteries

Solid Polymer Electrolyte Based on an Ionically Conducting Unique Organic Polymer Framework for All-Solid-State Lithium Batteries

Potential electrolytes for solid state batteries and its electrochemical analysis—A review

Recent Progress in Flame-Retardant Polymer Electrolytes for Solid-State Lithium Metal Batteries

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