Flexible and wrinkle-free electrode fabricated with polyurethane binder for lithium-ion batteries

Park, Geun-gyung; Park, Yang-kyu; Park, Joon-ki; Lee, Jaewon

doi:10.1039/c7ra00800g

Cited by 13 publications

(14 citation statements)

References 45 publications

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“…The criteria for suitable are: low solubility in the used electrolyte, high conducting, stable and electrochemically inert in the potential range of study, chemically inert towards the electrode and electrolyte and involved faradaic reaction. Generally, Nafion (sulfonated tetrafluoroethylene based fluoropolymer‐copolymer), PVDF (polyvinylidene difluoride), PMMA (Poly(methyl methacrylate)), polyurethranes, PEO (polyethylene oxide), CMC (carboxymethyl cellulose), polyimides and CMC are employed as electrode material binders . From the point of view of commercial application, appropriate choice of binder or additives is crucial as it may often considerably affect the surface properties of the active electrode material .…”

Section: Introductionmentioning

confidence: 99%

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Majumdar¹,

2019

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Vanadium pentoxide (V 2 O 5 ) is renowned among the highly efficient supercapacitor electrode-materials for high power and energy densities, excellent specific capacitance, prolonged cycle lives, variable oxidation states of V, reversible nature of interconversions, theoretical importance, etc. Various synthetic methodologies and morphologies, formation of composites, and doping for tuning properties are the additional causes of interest. Different synthetic techniques like sol-gel, solvothermal, electro-deposition, electro-spinning, atomic layer deposition, etc. are employed to prepare V 2 O 5 -based electrode materials with merits and demerits. High rate of material agglomeration and poor conductivity limit its usage in pristine morphology. Accordingly, the impact on charge storage behavior of V 2 O 5 on blending with various carbon-based systems has been explored for materials like activated carbons, conducting polymers, carbon nanotubes and functionalized graphene systems as binary/ternary composites. The aim has been to optimize the key factors such as reduced nanostructure lumping, minimal interfacial resistance and ultrafast charge diffusion across hollow porous structures which may eventually lead to the theoretically expected high specific capacitance (> 1000 F g À 1 ). In this review, we have discussed on the recent progress in the research of V 2 O 5 -based materials and highlighted on the correlation between morphology and electrochemical performances. In the course, we have attempted to delineate the advantage-disadvantages of different composite morphologies that may help to outline the present status and future aspects of these materials that the authors believe will be of first-hand assistance especially to the beginners in the field of research.

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Section: Introductionmentioning

confidence: 99%

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Majumdar¹,

2019

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“…The conventional cathodes, consisting of inorganic particles/polymer binder/carbons, perform sufficient charge/discharge capability, but they are not flexible. Some polymers, such as polyurethane and cellulose, have been tested to give high adhesivity with the particles and flexibility; however, a large amount of polymers over 10 wt% were added, which sacrificed electrode capacity and electrical conductivity. Use of polyaniline was searched to solve the trade‐off because it could function as a conductive agent and an active material .…”

Section: Properties Of the Flexible Cathodesmentioning

confidence: 99%

A Highly Flexible Yet >300 mAh cm⁻³ Energy Density Lithium‐Ion Battery Assembled with the Cathode of a Redox‐Active Polyether Binder

et al. 2019

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A highly flexible yet high‐energy‐density cathode for lithium‐ion batteries is fabricated with a novel redox‐active binder polymer composed of 2,2,6,6‐tetramethylpiperidine 1‐oxyl (TEMPO) with vinyl ether main chain, lithium cobalt oxide, and single‐walled carbon nanotube. The cathode itself and its battery display excellent durability against repeated bending over 104 times. The highest volumetric capacity beyond 300 mAh cm−3 as a flexible electrode is achieved based on the highly adhesive and redox‐active, robust radical polyether binder. A highly flexible, only 0.5 mm‐thick, lithium‐ion battery charge/discharges repeatedly with constant output around 3.8 V even under rapid bending. Herein, the operation of flexible electronic devices with well‐balanced energy density and power‐supplying purposes is discussed.

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“…The latter has not been addressed by other researchers in the field. Studies investigate single chemistries of polyurethane, neglecting to optimize their parameters or investigate how the different chemistries might affect performance. ,, PU is also nontoxic and in contrast to PVDF it does not decompose into hydrogen fluoride (HF) upon combustion, which can be a hazard in the event of thermal runaway …”

Section: Introductionmentioning

confidence: 99%

“…The PU chemistries are generally dictated by their diol backbone, which can be polyester, polyether, or polycaprolactone. There have been attempts to test the stability of PUs in various organic electrolyte solvents, with propylene carbonate (PC) demonstrating compatibility, but other common solvents experiencing dissolution . However, the methods used are not clear, the diol backbone is not specified, with another key paper contradicting the conclusion that PU is soluble in ethylene carbonate/diethyl carbonate (EC/DEC), achieving good performance with the same solvent mixture .…”

Section: Introductionmentioning

confidence: 99%

“…single chemistries of polyurethane, neglecting to optimize their parameters or investigate how the different chemistries might affect performance. 11,13,14 PU is also nontoxic and in contrast to PVDF it does not decompose into hydrogen fluoride (HF) upon combustion, which can be a hazard in the event of thermal runaway. 15 Paramount to binder effectiveness is compatibility with the electrolyte solvents.…”

Section: ■ Introductionmentioning

confidence: 99%

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Investigation into Durable Polymers with Enhanced Toughness and Elasticity for Application in Flexible Li-Ion Batteries

Jenkins

Coles

Loveridge

2020

ACS Appl. Energy Mater.

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Next-generation wearable devices compel the development of lithium-ion batteries (LIBs) that can afford mechanical flexibility while remaining safe and stable energy sources. In conventional battery designs the electrode coatings are susceptible to fracture and disintegration when exposed to cyclic flexure. This results in capacity loss, resistance increases, and severely limits their cycle life. Polyurethane (PU) has been investigated as a battery binder but without research into the variety of chemistries available, and how they affect performance. This research investigates three different PU chemistries, each composed of a different polyol backbone–polyester, polyether and polycaprolactone. These are compared with PVDF, the most commonly used rigid binder in industry. The combination of electrochemical and mechanical characterization identified the importance of PU binder chemistry, particularly when the binder’s interaction with the electrolyte was considered. Both the polyester and polycaprolactone PU chemistries swelled significantly when placed in an electrolyte, compromising their conductive networks and mechanical advantages. In contrast, polyether PU was found to be a suitable binder for flexible batteries as it has strong adhesion and retains its properties even after swelling in the electrolyte. These findings present a promising polymer choice to facilitate the development of advanced and durable electrodes for flexible energy storage systems.

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Flexible and wrinkle-free electrode fabricated with polyurethane binder for lithium-ion batteries

Abstract: Flexible and wrinkle-free electrodes for lithium-ion batteries (LIBs) have been developed by using polyurethane as a binder. The electrodes provide LIBs with robust mechanical properties and good electrochemical performances along with MWNT.

Cited by 13 publications

References 45 publications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

A Highly Flexible Yet >300 mAh cm⁻³ Energy Density Lithium‐Ion Battery Assembled with the Cathode of a Redox‐Active Polyether Binder

Investigation into Durable Polymers with Enhanced Toughness and Elasticity for Application in Flexible Li-Ion Batteries

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Flexible and wrinkle-free electrode fabricated with polyurethane binder for lithium-ion batteries

Abstract: Flexible and wrinkle-free electrodes for lithium-ion batteries (LIBs) have been developed by using polyurethane as a binder. The electrodes provide LIBs with robust mechanical properties and good electrochemical performances along with MWNT.

Cited by 13 publications

References 45 publications

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

A Highly Flexible Yet >300 mAh cm−3 Energy Density Lithium‐Ion Battery Assembled with the Cathode of a Redox‐Active Polyether Binder

Investigation into Durable Polymers with Enhanced Toughness and Elasticity for Application in Flexible Li-Ion Batteries

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Product

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About

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

A Highly Flexible Yet >300 mAh cm⁻³ Energy Density Lithium‐Ion Battery Assembled with the Cathode of a Redox‐Active Polyether Binder