Polyimide separators for rechargeable batteries

Lu, Ziheng; Sui, Fan; Miao, Yue‐E; Liu, Guohua; Li, Cheng; Dong, Wei; Cui, Jiang; Liu, Tianxi; Wu, Junxiong; Yang, Chunlei

doi:10.1016/j.jechem.2020.09.043

Cited by 105 publications

(50 citation statements)

References 153 publications

(174 reference statements)

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“…[ 54 ] They are characterized by a number of desired features for energy storage, including high energy density, low self‐discharge, good rate capability, and long shelf‐life. [ 55–57 ] However, the use of highly flammable and volatile organic liquid electrolytes causes severe safety concerns such as fire and explosion risks under abusive conditions (e.g., impact, overheating, and overcharging). Therefore, it needs to develop low‐cost electrolytes with low flammability, high ionic conductivity, good thermal stability.…”

Section: Dess For Energy Storage Applicationsmentioning

confidence: 99%

Deep Eutectic Solvents for Boosting Electrochemical Energy Storage and Conversion: A Review and Perspective

Liang

et al. 2021

Adv Funct Materials

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211

163

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The pursuit of sustainable energy utilization arouses increasing interest in efficiently producing durable battery materials and catalysts with minimum environmental impact. As green, safe, and cheap eutectic mixtures, deep eutectic solvents (DESs) provide tremendous opportunities and open up attractive perspectives as charge transfer and reaction media for electrochemical energy storage and conversion (EESC). In this review, the fundamental properties of DESs are first summarized. Then, the important roles that DESs play in various EESC technologies including advanced electrolytes for batteries/supercapacitors, media for the preparation of electrode materials and catalysts, and extracting agents for battery recycling are systematically reviewed. A particular focus is placed on the fundamental understanding of structure-composition-property-performance relationships. Finally, the challenges for the controllable design of DESs for EESC applications and future developments are presented. This review is expected to shed light on developing advanced DESs for next-generation EESC systems.

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Section: Dess For Energy Storage Applicationsmentioning

confidence: 99%

Deep Eutectic Solvents for Boosting Electrochemical Energy Storage and Conversion: A Review and Perspective

Liang

et al. 2021

Adv Funct Materials

Self Cite

211

163

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“…The results, Table 4, indicate that regardless of the fill density, the ionic conductivity is above 10 −3 S cm −1 , thus confirming the possibility of being applied as battery separator membranes. [39] The observed differences in the ionic conductivity are associated with the slight differences in the porous morphologies of the membranes.…”

Section: Uptake Ionic Conductivity and Electrochemical Testsmentioning

confidence: 97%

Direct‐Ink‐Writing of Electroactive Polymers for Sensing and Energy Storage Applications

Pinto

Serra

Barbosa

et al. 2021

Macro Materials & Eng

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Considering the high levels of materials used in the fields of electronics and energy storage systems, it is increasingly necessary to take into consideration environmental impact. Thus, it is important to develop devices based on environmentally friendlier materials and/or processes, such as additive manufacturing techniques. In this work, poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) are prepared by direct-ink-writing (DIW) by varying solvent evaporation temperature and fill density percentage. Different morphologies for both polymers are obtained, including dense films and porous membranes, as well as different electroactive 𝜷-phase content, thermal and mechanical properties. The dielectric constant and piezoelectric d 33 coefficient for dense films reaches up to 16 at 1 kHz and 4 pC N −1 , respectively for PVDF-HFP with a fill density of 80 and a solvent evaporation temperature of 50 °C. Porous structures are developed for battery separator membranes in lithium-ion batteries, with a highest ionic conductivity value of 3.8 mS cm −1 for the PVDF-HFP sample prepared with a fill density of 100 and a solvent evaporation temperature of 25 °C, the sample showing an excellent cycling performance. It is demonstrated that electroactive films and membranes can be prepared by direct-ink writing suitable for sensors/actuators and energy storage systems.

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“…One such candidate, poly(imide) (PI)‐based separator, has received a great deal of attention as an alternative separator for LIBs 24–26 . PI is composed of multiple units of imide functional groups, and one of its intrinsic thermal characteristics is its extra‐high heat resistance 27,28 .…”

Section: Introductionmentioning

confidence: 99%

Aluminum oxide and ethylene bis(diphenylphosphine)‐incorporated poly(imide) separators for lithium‐ion batteries

Cheon

Park

Kim

et al. 2022

Bulletin Korean Chem Soc

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Although poly(imide)‐based separators have received great attention as an alternative separator for lithium‐ion batteries, there are serious restrictions because their porous structures enable a great amount of current to leak internally. In this work, we report a one‐step coating process for the structures of poly(imide) (PI)‐based separators that effectively closes their pores. To close the large pores on a PI separator, nanosized aluminum oxide as a coating precursor and the free radical scavenging agent ethylene bis(diphenylphosphine) were co‐incorporated into the PI separator. Screening tests confirmed that ethylene bis(diphenylphosphine) (EPP) can effectively scavenge free radical species via chemical reaction and that incorporating Al2O3–EPP composites closed pores of the PI separators. Regarding electrochemical performance, the cell cycled with a PI separator that incorporated Al2O3–EPP exhibited stable cycling, while the cell cycled with a bare PI separator showed failure. These results indicate that incorporating Al2O3–EPP material effectively increases both safety and electrochemical performance. The Al2O3–EPP composites are incorporated onto the PI separator via dip‐coating process in order to improve electrochemical properties of PI separator. The cell cycled with the Al2O3–EPP incorporated PI separator exhibits stable cycling behavior because Al2O3–EPP composites effectively prevent internal short circuit in the cell.

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Polyimide separators for rechargeable batteries

Cited by 105 publications

References 153 publications

Deep Eutectic Solvents for Boosting Electrochemical Energy Storage and Conversion: A Review and Perspective

Deep Eutectic Solvents for Boosting Electrochemical Energy Storage and Conversion: A Review and Perspective

Direct‐Ink‐Writing of Electroactive Polymers for Sensing and Energy Storage Applications

Aluminum oxide and ethylene bis(diphenylphosphine)‐incorporated poly(imide) separators for lithium‐ion batteries

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