Polymer Chemistry
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2025
·
IF 3.9
Xu Han,Le Chang,Zeqian Wang,Xinfang Zhang,Feng Liu
Silicon side chain modification is an effective way for improving solvent resistance of one-component polysulfide adhesives, but the introduction of silicon side chains decreases hydrogen bonding interactions, leading to some reduction in initial mechanical properties. Based on the silicon modification, inserting more hydrogen bonding sites into a system is a viable approach to solving the above problems. In this work, a series of novel silicon side chain-modified one-component polysulfide adhesives (Sis-OCPSs) were successfully prepared using chain extenders in different proportions: 1,4-butanedithiol (BSO) and 1,3-bis(trimethylsilyl)urea (BSU). As expected, the CO groups and dual silicon side chains in BSU provide more active sites and silicon content, effectively reinforcing mechanical properties and solvent resistance. The optimal overall performance was obtained when the mass ratio of BSO and BSU was 8 : 1. Compared to silane side chain modification (Si-OCPS3) and before modification (Sis-OCPS0), Sis-OCPS3 exhibited the highest tensile strength, elongation and shear strength of 23.75 ± 0.34 MPa, 439.03% and 4.72 ± 0.27 MPa, respectively. Moreover, the tensile strength of Sis-OCPS3 could still reach 20.86 ± 0.29 MPa and 19.04 ± 0.27 MPa after immersion in oil and water for 21 d. We believe our paradigm can offer a feasible approach for designing high-performance one-component polysulfide adhesives.
研究领域:
高分子材料科学
·
胶粘剂化学
·
功能改性材料
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有机合成化学
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材料耐久性
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 29
·11416-11421
·
IF 8.262
Guocan Jiang,Zhenxiao Pan,Zhenwei Ren,Jun Du,Cheng Yang,Wenran Wang,Xinhua Zhong
Charge recombination losses are primarily responsible for the modest photovoltaic performance of quantum dot sensitized solar cells (QDSCs). Charge recombination occurring at the photoanode/electrolyte interface contributes significant energy loss in QDSC devices. Herein, a facile method to reduce the recombination loss by modifying the polysulfide electrolyte with the addition of poly(vinyl pyrrolidone) (PVP) as an efficient and general additive was introduced. It was found that the PVP modified polysulfide electrolyte could significantly improve the photovoltaic performance of QDSCs, especially the open-circuit voltage and fill factor. In addition, the PVP modified electrolyte is widely applicable to various QD sensitizer based systems. Impedance spectroscopy and open circuit voltage decay (OCVD) measurements reveal that the charge recombination processes occurring at the TiO2/QDs/electrolyte interfaces were remarkably inhibited using the PVP modified electrolyte. The average power conversion efficiency (PCE) was improved remarkably by 9% and a champion PCE of 9.77% was obtained with 20 wt% PVP in the polysulfide electrolyte for CdSexTe1−x based QDSCs. Moreover, the stability of the constructed QDSCs was also improved by employing the PVP modified polysulfide electrolyte.
研究领域:
材料科学
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光伏技术
·
化学工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yang Wang,Xiaodong Guo,Changtao Chen,Yasai Wang,Qian Li,Zhenguo Wu,Benhe Zhong,Yanxiao Chen
Lithium sulfur battery has been regarded as a promising candidate for the next generation advanced energy storage system with the merits of remarkably high energy density, low cost and natural abundance of elemental sulfur. However, the commercialization application of Li-S battery is severely restricted by the intrinsic poor conductivity of sulfur, dissolution of polysulfide as well as the well-known shuttle effect. Herein, binary transition metal oxide manganese ferrite (MnFe 2 O 4 ) prepared by coprecipitation was successfully used to modify the polypropylene (PP) separator for the first time. The bifunctional modified separator decorated with MnFe 2 O 4 and conductive acetylene black (AB) can efficiently hinder the diffusion of polysulfides due to synergistic effect of effective chemical adsorption and auxiliary physical blocking. Consequently, the cells with modified separator exhibit outstanding rate capacities of 920mAh/g at 1C, 845mAh/g at 2C and superior cycling performance of 625mAh/g after 500 cycles at 1C with a low capacity decaying of 0.074% per cycle. To the best of our knowledge, this work not only firstly testifies that MnFe 2 O 4 could entrap the polysulfide and alleviate the shuttle effect, but also presents a novel strategy by modifying separator with binary metal oxide to enhance the rate capacity and cycle performance of Li-S battery.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jingzhu Zhou,Qiong Qu,Wenwen Zhang,Hongyu Wang,Dongsheng Zhang,Guihua Liu
The inherent volume expansion of sulfur, the low conductivity of sulfur species, and the shuttle effects of lithium polysulfides (LiPSs) have limited the commercial deployment of lithium–sulfur (Li–S) batteries. Herein, a tungsten oxynitride skeleton featured with a three-dimensional ordered macroporous (3DOM) structure and embedded with ZIF-67-derived Co-NC nanoparticles (S/Co-NC/WNO) is developed as an effective sulfur host in Li–S batteries. The stable and unique 3DOM structure is conducive to electrolyte permeation and reduces the influence of the volume expansion. Nitrogen doping not only enhances the electrical conductivity of WO3 but also favors LiPS trapping. Meanwhile, Co-NC nanoparticles act as catalytic centers, promoting LiPS adsorption and catalytic conversion, leading to quick and durable Li–S chemistry. Therefore, S/Co-NC/WNO exhibits outstanding electrochemical performance. The initial discharge capacity is 1028.5 mAh g–1 at 0.2 C, and after 100 cycles, a discharge capacity of 938.0 mAh g–1 is maintained. Even under a sulfur loading of 8 mg cm–2, the Li–S battery was capable of reaching an areal capacity of 5.54 mAh cm–2. In addition, the flexible pouch cell based on S/Co-NC/WNO cathode also achieved stable cycling performance, which demonstrates its promising potential in Li–S battery applications.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 1
·71-77
·
IF 4.136
Lei Tan,Xinhai Li,Zhixing Wang,Huajun Guo,Jiexi Wang,Liang An
Graphical Divide and conquer : A porous carbon (PC) with a high specific surface area and large pore volume, prepared from an abundant industrial byproduct (coal tar pitch, CTP), is composited with multi-walled carbon nanotubes (MWCNTs) through a heat-treatment method. The PC/MWCNT composite is deposited onto one side of a polypropylene (PP) separator by using a slurry coating method. The modified separator is then applied in Li−S batteries with promising results. An issue associated with lithium−sulfur (Li−S) batteries is polysulfide dissolution, leading to the serious crossover of polysulfide to the Li anode. To address this issue, we report on a multifunctional separator prepared by introducing a porous carbon/multi-walled carbon nanotube (PC/MWCNT) composite into a commercial separator. It shows that the PC/MWCNT composite is able to enhance the interfacial interaction between the coating and the polysulfide and provides a large surface area for absorbing the polysulfide, thus improving the electrical conductivity. It has been demonstrated that the Li−S cell constructed with the PC/MWCNT composite separator results in a reversible capacity as high as 659 mAh g −1 after 200 cycles at 0.5 C, and the average capacity fading rate of the cell is about 0.138 % per cycle. The performance improvement is attributed to a reduction in the crossover rate of polysulfide through the composite separator as a result of the polysulfide absorption by PC/MWCNT layer.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Wei Kou,Xiangcun Li,Yang Liu,Xiaopeng Zhang,Shaoran Yang,Xiaobin Jiang,Gaohong He,Yan Dai,Wenji Zheng,Guihua Yu
Here we report a highly scalable yet flexible triple-layer structured porous C/SiO2 membrane via a facile phase inversion method for advancing Li–sulfur battery technology. As a multifunctional current-collector-free cathode, the conductive dense layer of the C/SiO2 membrane offers hierarchical macropores as an ideal sulfur host to alleviate the volume expansion of sulfur species and facilitate ion/electrolyte transport for fast kinetics, as well as spongelike pores to enable high sulfur loading. The triple-layer structured membrane cathode enables the filling of most sulfur species in the macropores and additional loading of a thin sulfur slurry on the membrane surface, which facilitates ion/electrolyte transport with faster kinetics than the conventional S/C slurry-based cathode. Furthermore, density functional theory simulations and visual adsorption measurements confirm the critical role of the doped SiO2 nanoparticles (∼10 nm) in the asymmetric C membrane in suppressing the shuttle effect of polysulfides via chemisorption and electrocatalysis. The rationally designed C/SiO2 membrane cathodes demonstrate long-term cycling stability of 300 cycles at a high sulfur loading of 2.8 mg cm–2 with a sulfur content of ∼75%. This scalable yet flexible self-supporting cathode design presents a useful strategy for realizing practical applications of high-performance Li–S batteries.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Wentong Gao,Mengyao Bie,Fu Liu,Pengshan Chang,Yiwu Quan
Polysulfide sealants have been commercially applied in many industrial fields. In this article, we study the self-healing property of the epoxy resin-cured polysulfide sealants for the first time. The obtained sealants showed a flexible range of ultimate elongation of 157–478% and a tensile strength of 1.02–0.75 MPa corresponding to different polysulfide oligomers. By taking advantage of the dynamic reversible exchange of disulfide bonds, polysulfide sealants exhibited good self-healing ability under a moderate thermal stimulus. A higher molecular weight and a lower degree of cross-linking of polysulfide oligomer were helpful in improving the ultimate elongation and healing efficiency of the polysulfide sealants. After subjecting to a temperature of 75 °C for 60 min, both the tensile strength and ultimate elongation of a fully cut sample, LP55-F, were restored to 91% of the original values, without affecting the sealing property. Furthermore, the sample exhibited excellent reshaping and reprocessing abilities. These outcomes offer a paradigm toward sustainable industrial applications of the polysulfide-based sealants.
研究领域:
材料科学
·
工业应用
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Ruiyu Liu,Su Yan,Xin Huang,Weizhe Xiang,Jian Xu,Zhizhao Xu,Mei Ding,Binglei Liu,Hongtai Li,Xiaolei Huang,Shengqi Chu,Guangmin Zhou,Chuankun Jia
The development of low-cost and durable electrodes in aqueous polysulfide-based flow batteries for grid-scale energy storage remains a critical challenge for renewable energy integration. Here, we report a metallic-phase molybdenum disulfide (1T-MoS 2 ) electrocatalyst that fundamentally enhances polysulfide (S 2 2− /S 2− ) redox kinetics and simultaneously catalyzes the I − /I 3 − redox couple. By extending its application from polysulfide/ferricyanide (S Fe) to polysulfide/iodine (S I) flow batteries (FBs), we demonstrate its notable versatility. This dual functionality represents a critical advancement for dual-species systems. The basal plane of 1T-MoS 2 exhibits strong adsorption affinity for polysulfide (S 2 2− to S 8 2− ) species. Moreover, it shifts the Gibbs free energy change of the rate-determining step toward more favorable values by 28% compared to commercial carbon felt electrode (CF), and establishes efficient electron-transfer pathways. The S Fe FB with 1T-MoS 2 modified carbon felt (1T-MoS 2 /CF) electrode achieves an inspiring 68% increasement in energy efficiency (EE) at a big current density of 100 mA cm ‐2 and a 14% increase in peak power density compared to the pristine CF-based counterpart. Remarkably, the 1T-MoS 2 /CF electrode sustains 2500 cycles (960 h) with an ultralow capacity decay rate of 0.002% per cycle. In S I FBs, the 1T-MoS 2 /CF electrode achieves a breakthrough peak power density of 135 mW cm −2 (62.7% higher than CF) and sustains an average EE of 83.7% over 200 cycles at 20 mA cm −2 , outperforming the cells assembled with 2H-MoS 2 /CF (78.1%) and pristine CF (73.5%). By resolving the long-standing trade-off between efficiency and durability across multiple redox systems, we establish 1T-MoS 2 /CF as a universal electrocatalytic platform, paving the way for high-performance, multi-chemistry compatible flow batteries as grid-scale storage technologies.
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2017
·
IF 2.858
Yuliang Zhang,Leishan Shao,Bin Liu,Fei Wang,Yinghan Wang
In the present work, polyester waterborne polysulfide-based polyurethane (WSPU) films were successfully synthesized from liquid polysulfide(PSF), poly(butylene adipate) (PBA) and isophorone diisocyanate (IPDI). The effect of PSF molecular weight on the chemical structures, mechanical and thermal properties of the resultant films were investigated by Fourier transform infrared (FTIR) spectroscopy, tensile test and Thermogravimetric analyzer (TGA). As the molecular weight of PSF increased, microphase separation was enhanced to some extent, resulting into an enhanced mechanical behavior and thermal stability. Meanwhile, with the increase in molecular weight of PSF, water resistance investigated by means of water uptake and mechanical behavior analysis was enhanced in general. Chemical resistance to organic solvents was also improved. When the molecular weight of PSF was about 5000, the water uptake and solvent swelling decreased to 2.83% and 95.1% respectively. The excellent performance may suggest a broader application in the surface material areas for WSPU films.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12031-12040
·
IF 3.553
Xiong Man,Qian Jingwen,Yang Kai,Chen Zihe,Mei Tao,Wang Jianying,Li Jinhua,Yu Li,Wang Xianbao
Controlling the inherent polysulfide shuttle process has been the key research topic to solve the irreversible capacity loss problem of Li–S battery. By skillfully designing, hierarchical brain coral-like WS 2 nanosheets are synthesized. The novel structure is consisted of WS 2 nanosheets arrayed along the same crystal plane, which expose a large number of adsorption active sites and enhance the adsorption of polysulfides. At the same time, the multilayer sheet structure has a large specific surface area and increases the sulfur loading. The brain coral-like WS 2 /S cathode exhibits excellent electrochemical properties, which delivers an initial discharge specific capacity of 1308 mAh g −1 at 0.1 C. And when cycles at 2 C, the discharge specific capacity is maintained at 721 mAh g −1 after 500 cycles, together with a low decay of 0.06% per cycle.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xu Han,Zhijian Pan,Le Chang,Yumei Ji,Zeqian Wang,Feng Liu
The degree of microphase separation plays a vital role in one-component polysulfide adhesives determining their mechanical properties and thermal stability. However, the degree of microphase separation was mainly determined by the hard segment content and molecular weight of liquid polysulfide. In this work, we successfully prepared a series of one-component polysulfide adhesives with 30 wt%–50 wt% hard segment content by using 4,4-diphenylmethane diisocyanate (MDI), different molecular weights (1000, 2500, and 4000 g/mol) of liquid polysulfides (JLY-121/1225/124) and 1,4-butanedithiol (BSO), and systematically investigated the relationship between microphase separation and material's properties. The results revealed that higher hard segment content and larger molecular weight of liquid polysulfide contributed to forming a higher degree of microphase separation, respectively. Among them, the optimal mechanical properties and thermal stability were obtained at 40 wt% hard segment content when JLY-1225 (2500 g/mol) was used. After immersion in the oil and water for 21 days, the tensile strength of C 40 -1225 could still reach 16.99 ± 0.80 and 14.87 ± 0.30 MPa, with a tensile strength retention rate of 75.75% (oil) and 66.30% (water), confirming that one-component polysulfide adhesives had good solvent resistance.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 38
·2101006
·
IF 30.849
Wuxing Hua,Huan Li,Chun Pei,Jingyi Xia,Yafei Sun,Chen Zhang,Wei Lv,Ying Tao,Yan Jiao,Bingsen Zhang,Shi-Zhang Qiao,Ying Wan,Quan-Hong Yang
The shuttling of soluble lithium polysulfides between the electrodes leads to serious capacity fading and excess use of electrolyte, which severely bottlenecks practical use of Li-S batteries. Here, selective catalysis is proposed as a fundamental remedy for the consecutive solid-liquid-solid sulfur redox reactions. The proof-of-concept Indium (In)-based catalyst targetedly decelerates the solid-liquid conversion, dissolution of elemental sulfur to polysulfides, while accelerates the liquid-solid conversion, deposition of polysulfides into insoluble Li 2 S, which basically reduces accumulation of polysulfides in electrolyte, finally inhibiting the shuttle effect. The selective catalysis is revealed, experimentally and theoretically, by changes of activation energies and kinetic currents, modified reaction pathway together with the probed dynamically changing catalyst (LiInS 2 catalyst), and gradual deactivation of the In-based catalyst. The In-based battery works steadily over 1000 cycles at 4.0 C and yields an initial areal capacity up to 9.4 mAh cm −2 with a sulfur loading of ≈9.0 mg cm −2 .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）