Highly sulfur-rich polymeric cathode materials via inverse vulcanization of sulfur for lithium–sulfur batteries

Yeşilot, Serkan; Küçükköylü, Sedat; Mutlu, Tutku; Demir, Emrah; Demir‐Cakan, Rezan

doi:10.1016/j.matchemphys.2022.126168

Cited by 7 publications

(1 citation statement)

References 58 publications

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“…The C 1s core spectrum of MP‐50EG‐50S can be deconvoluted into three peaks at BE=285.8, 285.4, 284.2 eV referred to C=O, covalently bound C−S and C−C/C=C bonds, respectively [23] . Additionally, the S 2p core spectrum of MP‐50EG‐50S consist of three peaks at BE=167.5 (C−S), 164.2 (S 2p3/2) and 163.04 eV (S 2p1/2), of which are result from the C−S/S−S bonds between MP‐50EG and elemental sulfur [6b,24] . Also, we carried out XPS measurements for the blend S/MP‐50EG to support the formation of C−S bonds.…”

Section: Resultsmentioning

confidence: 99%

Ethylene Glycol‐Containing Acrylic Polyphosphazene Based Cathode Materials via Inverse Vulcanization of Sulfur for Li−S Batteries

Yeşilot,

Küçükköylü,

Mutlu

et al. 2024

ChemElectroChem

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The cell performance of Li−S batteries can be improved by establishing compatibility with the electrolyte of cathode and enhancing lithium‐ion diffusion (ionic conductivity) or electrical conductivity. In this work, we introduce cathode material based on ethylene glycol‐containing acrylic polyphosphazene. Poly[(2acrylamidoethoxy)‐random‐(methoxyethoxyethoxy)] phosphazenes were synthesized by macromolecular substitution of poly(dichloro)phosphazene with 2‐acrylamidoethanol and diethylene glycol methyl ether in two different ratios (25 and 50 mol% of ethylene glycol methyl ether), abbreviated as MP‐25EG and MP‐50EG, where ethylene glycol chains enhance the electrolyte compatibility and ion transport of the sulfur cathode material. Then, poly[S‐random‐(2acrylamidoethoxy)‐random‐(methoxyethoxyethoxy)] phosphazene polymers, designated as MP‐25EG‐xS or MP‐50EG‐xS (x=50 and 80 wt.% of sulfur) were prepared by inverse vulcanization of polymer with two feed sulfur ratios. Structural characterizations of the polymers were carried out using appropriate standard spectroscopic methods such as 1H and 31P NMR, FT‐IR, DSC and TGA as well as XPS. The electrochemical performance of MP‐25EG‐50S, MP‐25EG‐80S and MP‐50EG‐50S, MP‐50EG‐80S were evaluated and the effect of ethylene glycol was investigated by comparing cell performances. MP‐50EG‐50S demonstrated its promising applicability in Li–S batteries by exhibiting much better electrochemical respond with a discharge capacity of 745 mAh/g at C/5 current density over 100 cycles.

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Section: Resultsmentioning

confidence: 99%

Ethylene Glycol‐Containing Acrylic Polyphosphazene Based Cathode Materials via Inverse Vulcanization of Sulfur for Li−S Batteries

Yeşilot,

Küçükköylü,

Mutlu

et al. 2024

ChemElectroChem

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Sulfur‐Rich Polymers Coatings

King‐Poole,

Thérien‐Aubin

2024

Adv Funct Materials

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Advancements in the synthesis of sulfur‐rich materials are driving progress across diverse fields owing to the rich and tunable functionalities of those materials. These materials are typically valued for their electrochemical behaviors, high refractive indices, heavy metal affinity, and ability to form dynamic covalent bonding. As a result, their applications span various industries including electronics, catalysis, lithium‐sulfur batteries, water reclamation, and optoelectronics. Moreover, elemental sulfur, a byproduct of the petroleum industry, is produced abundantly, necessitating the exploration of novel valorization routes for polymers made from this feedstock. The unique combination of properties of sulfur‐rich polymers also makes them an ideal platform for the development of high‐performance functional coatings, offering durability and tailored functionalities for protective coatings, thus enhancing materials lifespan and performances in a variety of environmental conditions. The presence of dynamic covalent bonds in many sulfur‐rich polymers enables the creation of self‐healing coatings, while sulfur itself or the comonomers can contribute to antimicrobial, antifouling, and corrosion‐resistant properties. Furthermore, sulfur‐rich polymers have the potential to be used in the design of icephobic and superhydrophobic coatings. This underscores the versatility of sulfur‐rich polymers as a platform for the creation of advanced coatings with superior properties.

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