Electrospun 3D Structured Carbon Current Collector for Li/S Batteries

Kalybekkyzy, Sandugash; Mentbayeva, Almаgul; Yerkinbekova, Yerkezhan; Baikalov, Nurzhan; Kahraman, Memet Vezi̇r; Bakenov, Zhumabay

doi:10.3390/nano10040745

Cited by 21 publications

(11 citation statements)

References 58 publications

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“…In recent years, the development of rechargeable lithium-ion batteries (LIBs) with enhanced electrochemical performance and safety has gained exceptional importance due to the growing need for sustainable energy and power supply, the miniaturization of devices, and the rapid expansion of the portable electronics market [1][2][3]. Particularly, flexible LIBs has become a field of intensive research, as a promising power source for forthcoming flexible and wearable electronics such as smart cloth, roll-up displays, bio-implants, foldable devices, and sensing smart displays [4,5].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of UV-Crosslinked Flexible Solid Polymer Electrolyte with PDMS for Li-Ion Batteries

et al. 2020

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Conventional carbonate-based liquid electrolytes have safety issues related to their high flammability and easy leakage. Therefore, it is essential to develop alternative electrolytes for lithium-ion batteries (LIBs). As a potential candidate, solid-polymer electrolytes (SPEs) offer enhanced safety characteristics, while to be widely applied their performance still has to be improved. Here, we have prepared a series of UV-photocrosslinked flexible SPEs comprising poly(ethylene glycol) diacrylate (PEGDA), trimethylolpropane ethoxylate triacrylate (ETPTA), and lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) salt, with the addition of polydimethylsiloxane with acrylated terminal groups (acryl-PDMS) to diminish the crystallinity of the poly(ethylene glycol) chain. Polysiloxanes have gained interest for the fabrication of SPEs due to their unique features, such as decrement of glass transition temperature (Tg), and the ability to improve flexibility and facilitate lithium-ion transport. Freestanding, transparent SPEs with excellent flexibility and mechanical properties were achieved without any supporting backbone, despite the high content of lithium salt, which was enabled by their networked structure, the presence of polar functional groups, and their amorphous structure. The highest ionic conductivity for the developed cross-linked SPEs was 1.75 × 10−6 S cm−1 at room temperature and 1.07 × 10−4 S cm−1 at 80 °C. The SPEs demonstrated stable Li plating/stripping ability and excellent compatibility toward metallic lithium, and exhibited high electrochemical stability in a wide range of potentials, which enables application in high-voltage lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Fabrication of UV-Crosslinked Flexible Solid Polymer Electrolyte with PDMS for Li-Ion Batteries

et al. 2020

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“…The light wight of CNF current collector and high sulfur areal mass loading resulted in improved capacity for the whole mass of mAh g -1 , while the conventional one on Al foil offered 200 mAh g -1 . Therefore, the capacity of the electrode was increased 2.5 times by replacing the Al foil with an ultralight and porous cPAN CNF current collector [19].…”

Section: Multifunctional Materials For Li-s Batteriesmentioning

confidence: 99%

Advanced Battery Materials Research at Nazarbayev University: Review

Kurmanbayeva

Mentbayeva

Nurpeissova

et al. 2021

Eurasian Chem. Tech. J.

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With the rapid development of new and advanced technologies, the request for energy storage device with better electrochemical characteristics is increasing as well. Therefore, the search and development for more novel and efficient energy storage components are imperative. In Kazakhstan there are several groups that were established to conduct research in the field of energy storage devices. One of them is professor Mansurov’s research group with we have a long time fruitful collaboration. Group at Nazarbayev University do research in design and investigation of advanced energy storage materials for high performance energy storage devices, including lithium-ion batteries, sodium-ion batteries, lithium-sulfur batteries, and aqueous rechargeable batteries, employing strategies as nanostructuring, nano/micro combination, hybridization, pore-structure control, configuration design, 3D printing, surface modification, and composition optimization. This manuscript reviews research on advanced battery materials, provided by Nazarbayev University scientists since the last 10 years.

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“…Poly(vinylpyrrolidone) (PVP) 29 , poly(vinyl alcohol) (PVA) 30 , poly(vinylidene fluoride) (PVDF) 31 , and poly(acrylonitrile) (PAN) 32 are the commonly used polymers for developing electrospun separators. Among them, PAN is the most suitable polymer for nanofibrous separators owing to its remarkable chemical and physical durability with easy processability, oxidative degradation resistance, and electrochemical stability 33 – 35 . PAN also reduces the formation of lithium dendrites during the charging/discharging processes 36 .…”

Section: Introductionmentioning

confidence: 99%

Photo-crosslinked lignin/PAN electrospun separator for safe lithium-ion batteries

Yerkinbekova

Kalybekkyzy

Tolganbek

et al. 2022

Sci Rep

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A novel crosslinked electrospun nanofibrous membrane with maleated lignin (ML) and poly(acrylonitrile) (PAN) is presented as a separator for lithium-ion batteries (LIBs). Alkali lignin was treated with an esterification agent of maleic anhydride, resulting in a substantial hydroxyl group conversion to enhance the reactivity and mechanical properties of the final nanofiber membranes. The maleated lignin (ML) was subsequently mixed with UV-curable formulations (up to 30% wt) containing polyethylene glycol diacrylate (PEGDA), hydrolyzed 3-(Trimethoxysilyl)propyl methacrylate (HMEMO) as crosslinkers, and poly(acrylonitrile) (PAN) as a precursor polymer. UV-electrospinning was used to fabricate PAN/ML/HMEMO/PEGDA (PMHP) crosslinked membranes. PMHP membranes made of electrospun nanofibers feature a three-dimensional (3D) porous structure with interconnected voids between the fibers. The mechanical strength of PMHP membranes with a thickness of 25 µm was enhanced by the variation of the cross-linkable formulations. The cell assembled with PMHP2 membrane (20 wt% of ML) showed the maximum ionic conductivity value of 2.79*10−3 S cm−1, which is significantly higher than that of the same cell with the liquid electrolyte and commercial Celgard 2400 (6.5*10−4 S cm−1). The enhanced LIB efficiency with PMHP2 membrane can be attributed to its high porosity, which allows better electrolyte uptake and demonstrates higher ionic conductivity. As a result, the cell assembled with LiFePO4 cathode, Li metal anode, and PMHP2 membrane had a high initial discharge specific capacity of 147 mAh g−1 at 0.1 C and exhibited outstanding rate performance. Also, it effectively limits the formation of Li dendrites over 1000 h. PMHP separators have improved chemical and physical properties, including porosity, thermal, mechanical, and electrochemical characteristics, compared with the commercial ones.

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Electrospun 3D Structured Carbon Current Collector for Li/S Batteries

Cited by 21 publications

References 58 publications

Fabrication of UV-Crosslinked Flexible Solid Polymer Electrolyte with PDMS for Li-Ion Batteries

Fabrication of UV-Crosslinked Flexible Solid Polymer Electrolyte with PDMS for Li-Ion Batteries

Advanced Battery Materials Research at Nazarbayev University: Review

Photo-crosslinked lignin/PAN electrospun separator for safe lithium-ion batteries

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