JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Yi Deng,Qichen Chen,Jiaxiang Liu,Yuejing Zeng,Ruilai Ye,Xinyu Li,Peng Zhang,Jinbao Zhao
Sulfurized polyacrylonitrile (SPAN), as an inherently safe, low-cost, and long-cycle-life material, holds a promising future in large-scale energy storage applications. However, there are still issues such as sluggish electrochemical reaction kinetics and low energy utilization efficiency, which severely constrain practical applications. Herein, we introduce the displacement reaction of Cu 2 S-Li 2 S to the conversion reaction of SPAN/Li 2 S by incorporating Carbon Nanotube (CNT) and Copper (Cu) to fabricate Cu-SPAN/CNT cathode. Detailed experimental investigations demonstrate the fast and reversible Cu 2 S-Li 2 S displacement reaction, enhancing the SPAN/Li 2 S redox kinetics. Consequently, Cu-SPAN/CNT achieves 1450 mAh g −1 at 1 C with 80.3 % retention after 1000 cycles, while delivering 1207 mAh g −1 at 4 C and maintaining operation under practical conditions (6.75 mg cm −2 sulfur loading, −20 °C). Crucially, it attains 79.8 % energy utilization efficiency at the 100th cycle. In conclusion, this work optimizes the cycling process of SPAN-based batteries, particularly the highly polarized charging processes, providing a simple solution for developing energy storage applications with extended cycle life, accelerated reaction kinetics, and enhanced energy utilization efficiency.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Qi Huimin,Lei Yang,Yu Jiaxin,Zhao Gai,Guo Baogang,Zhou Liang,Zhang Ding
The effect of fullerene carbon (C60) on the tribological performance of polyimide (PI) composites was explored at different temperature conditions. The results demonstrate the addition of 1.0 wt% C60 can greatly enhance the tribological performance of PI/1.0C60. The friction coefficients and wear rates of 0.03/0.07 and 1.0 × 10 −5 /1.6 × 10 −5 mm 3 /Nm can be achieved at − 100 °C/200 °C, respectively, reducing by 86.4%/50.0% and 28.6%/30.1% compared with pure PI. It demonstrated the polymer states influenced the lubricated and loading carry capability of the sliding interfaces at different temperatures. XPS results indicated tribo-oxidation and organic-inorganic chelation reaction dominated the tribofilm growth. Moreover, molecular dynamics simulation showed the C60 enables the shear of PI easily due to the decreased intermolecular forces.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 7
·3193-3198
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IF 5.1
Yamei Ding,Mingyu Xie,Ping He,Ziqi Zhao,Huiwen Lin,Li Tao
Wide-bandgap quantum dots (QDs) have recognized as the third generation of low-dimensional semiconductors with reliable optical response, outstanding stability and biocompatibility for long-term biosensing in health care applications, especially in extreme environments. However, the applicable scenarios are limited, because optical switching over a large span from the wide bandgap (deep UV region) to the visible region is challenging due to the stable framework and the high breakdown difficulty. In this work, we adopted a facile protonation/deprotonation treatment process, which is suitable for different biogenic environments, to modulate the one-photon and two-photon fluorescence of wide-bandgap QDs. Two fluorescent centers are coordinative to control one-photon emission from deep blue (410 nm) to yellow (585 nm) emission with a wide large-span modulation, superior to most reports under different acid–base environments. The electron transition between electron-donating amine (–NH2) groups and H+ (–OH) changes the degree of nonradiative transition, narrowing the breadth of the full width at half maximum (FWHM) by 34.4%. Moreover, our QDs exhibit two-photon fluorescence at 710 nm, which have never reported before for wide-bandgap nitrides. It shows pH-independent two-photon fluorescence because of the intrinsic electron–phonon coupling of the π-conjugated structure. This work introduces a simple design strategy to realize fluorescence control over a large span in wide-bandgap nanomaterials, enabling distensible applications in biological health and pH related linear or nonlinear optical fields.
研究领域:
纳米材料
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生物传感
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光学
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DOI
高影响因子
International Journal of Structural Stability and Dynamics
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2018
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IF 2.082
Yan-Chun Ni,Qi-Wei Zhang,Jian-Feng Liu
Modal identification aims at identifying the dynamic properties including natural frequency, damping ratio, and mode shape, which is an important step in further structural damage detection, finite element model updating, and condition assessment. This paper presents the work on the investigation of the dynamic characteristics of a long-span cable-stayed bridge-Sutong Bridge by a Bayesian modal identification method. Sutong Bridge is the second longest cable-stayed bridge in the world, situated on the Yangtze River in Jiangsu Province, China, with a total length of 2 088 m. A short-term nondestructive on-site vibration test was conducted to collect the structural response and determine the actual dynamic characteristics of the bridge before it was opened to traffic. Due to the limited number of sensors, multiple setups were designed to complete the whole measurement. Based on the data collected in the field tests, modal parameters were identified by a fast Bayesian FFT method. The first three modes in both vertical and transverse directions were identified and studied. In order to obtain modal parameter variation with temperature and vibration levels, long-term tests have also been performed in different seasons. The variation of natural frequency and damping ratios with temperature and vibration level were investigated. The future distribution of the modal parameters was also predicted using these data.
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DOI
高影响因子
Food Science and Human Wellness
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2020
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IF 2.455
Ting Zhang,Mengzhen Ding,Xichang Wang,Jian Zhong
The droplet and creaming stability of food emulsions stabilized by mixed emulsifiers is a research hotspot in the field of emulsions. In this work, we mainly explore the effect of pH change on the droplet and creaming stability of fish oil-loaded emulsions synergetically (Span 80 and SL) or competitively (Tween 80 and SDS) stabilized by gelatin/surfactant. The results demonstrate that initial droplet stability and droplet storage stability, and creaming stability of the pH-adjusted emulsions are dependent on both the adsorption ways of emulsifiers and the adjusted pH: (1) Competitively stabilized emulsions have more stable droplets than synergetically stabilized emulsions; (2) SDS-dominant competitively stabilized emulsions have more stable droplets than gelatin-dominant emulsions; (3) Basic pH-adjusted emulsions have more stable droplets than acidic pH-adjusted emulsions; (4) The synergetically stabilized emulsions at acidic pH have significantly higher creaming indexes than that at basic pH; and (5) The competitively stabilized emulsions have high or similar creaming indexes to that at acidic pH. Further, the mechanisms are proposed according to Stokes’ Law. This work will provide useful information to understand the interfacial properties of mixed emulsifiers in the food emulsions and promising application perspective for the development of food beverages including acidic and alkali beverages.
研究领域:
食品科学
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化学工程
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胶体科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Fei Han,Chunyang Yin,Lulu Liu,Hao Niu,Jianquan Luo,Yinhua Wan,Weijie Song,Wei Liu
Acidic wastewater, primarily generated from mining, metallurgical, and chemical industries, poses significant risks to both the environment and human health. Nanofiltration (NF) has emerged as a promising approach for treating such wastewater, yet the performance of acid-resistant membranes remains limited. In this work, acid-stable poly(amide-sulfonamide) (PASA) thin-film composite (TFC) NF membranes were fabricated via interfacial polymerization (IP), with the nonionic surfactant sorbitan monooleate (Span 80) employed to modulate the IP process, markedly enhancing membrane performance. Specifically, Span 80 was found to orient at the water–organic interface, significantly reducing interfacial tension and accelerating the diffusion of 3-aminobenzenesulfonamide (ABSA) monomers, thereby forming a thicker, highly cross-linked, and defect-free PASA selective layer. The optimized NF-0.1 membrane exhibited the smallest average pore size (0.635 nm) and a defect-free selective layer, with Na₂SO₄ and MgSO₄ (the concentration of the salt solution is 1000 mg/L) rejection exceeding 99 % and 95 %, respectively, while maintaining a moderate permeance of 3.05 ± 0.15 L·m −2 ·h −1 ·bar −1 . Long-term stability tests, pressure-resistance evaluations, and 35-day static acid immersion experiments demonstrated excellent operational stability, pressure tolerance, and acid resistance. Compared with previously reported acid-resistant NF membranes and commercial high-acid-stability membranes, NF-0.1 had a higher retention effect on monovalent and divalent sulfates. This work provides a simple and scalable strategy for producing defect-free, highly selective PASA acid-resistant NF membranes and highlights the critical role of surfactant-assisted monomer diffusion in optimizing membrane structure and performance.
研究领域:
环境工程
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膜科学与技术
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材料科学
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化学工程
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水处理
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 2
·1846-1854
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IF 5.532
Xinkun Liu,Ying Dai,Xinmei Pei,Wen Chen
The electrocaloric (EC) effect cooling technique of environmentally friendly lead-free thin film materials driven by electric fields has recently gained tremendous attention due to the urgent demand for microelectronic and integrated circuit refrigeration devices. However, the widespread use of lead-free materials in EC devices is seriously hindered due to the small electrocaloric temperature change (ΔT) within a narrow operation temperature span (T span ) near room temperature. Here, lead-free Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9-x Sn x O 3 (BCZT-xSn, 0 ≤ x ≤ 0.03) thin films were prepared on substrates (Pt/Ti/SiO 2 /Si) via a sol-gel route. The BCZT-0.02Sn thin film presents an excellent EC effect (ΔT = 32.74 K, ΔS = 37.18 J kg −1 K −1 ) and large EC strength (ΔT/ΔE = 0.033 K cm kV −1 , ΔS/ΔE = 0.037 J cm K −1 kg −1 kV −1 ) over a wide T span (∼26 K) under 1000 kV cm −1 near room temperature. The giant ΔT is mainly attributed to the emergence of an intermediate O phase and the formation of a multiphase (R, O and T phases) coexistence structure at room temperature, while the diffuse phase transition behavior is responsible for the wide T span . Our study provides a new idea for developing environment-friendly EC materials with an excellent room-temperature ΔT over a broad operational temperature region.
研究领域:
材料科学
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功能材料
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固态物理
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环境友好材料
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制冷技术
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
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IF 3.973
Shikang Meng,Lin Sun,Lun Wang,Zibei Lin,Zeyu Liu,Long Xi,Zhenping Wang,Ying Zheng
Psoriasis is a severe disfiguring skin disease affecting approximately 3% of people worldwide and negatively affecting their daily lives. The pathogenesis of psoriasis is complicated, and typical therapeutic strategies for psoriasis mainly focus on anti-inflammation. Considering the side effects, withdrawal rebound, high cost, and many other disadvantages of existing treatments, we developed a new topical therapeutic formulation consisting of niosomes loaded with celastrol, a triterpenoid extracted from Tripterygium . Celastrol niosomes were prepared by the thin film hydration method and probe sonication. The niosomes were composed of Span 20, Span 60, and cholesterol at a weight ratio of 3:1:1. The particle size of the niosomes was approximately 147 nm, with yield of up to 90%. Celastrol niosomes showed improved in vitro permeation ability compared to the raw drug. In our in vivo study, celastrol niosomes effectively alleviated erythema and scaling on the dorsal skin of psoriasis mouse models. Spleen weight and the levels of cytokines, including IL-22, IL-23, and IL-17, decreased after the treatment, indicating the high therapeutic potential of this formulation for psoriasis. In conclusion, encapsulation of celastrol by niosomes increased the water-solubility and permeation of celastrol into the skin, significantly improving its anti-psoriasis activity in mice.
研究领域:
药剂学
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皮肤病学
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药物递送系统
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yeshun Tian,Xuefeng Gao,Yongsheng Li,Yanjie Liu,Changliang Wu,Xiao Xia,Yansheng Wang,Zongming Liu,Hao Liu,Runhe He,Guangbin Duan
Polymerization-programmed La–N 4 S 2 single-atom sites accelerate solid–solid conversion in SPAN. • Low-temperature sulfurization stabilizes isolated La sites within a nanoflower-derived framework. • La–N 4 S 2 motifs enhance local polarity and electronic coupling to strengthen Li 2 S x interactions. • La 2.5 –FSPAN retains 1328 mAh g −1 after 100 cycles at 4.5 mg cm −2 and E/S = 10 μL mg −1 . • La w –FSPAN delivers low polarization, strong rate capability, and long-term cycling durability. Sulfurized polyacrylonitrile (SPAN) cathodes suppress polysulfide shuttling yet remain limited by sluggish solid–solid conversion under practical conditions. Here, a polymerization-programmed strategy is developed to embed trace La into a nanoflower polyacrylonitrile scaffold (FPAN), where La is pre-organized through interactions with N-containing functionalities during polymerization, followed by low-temperature sulfurization to afford sulfurized FPAN (FSPAN) with isolated La sites of predominant La–N 4 S 2 six-coordination. The La–N 4 S 2 motif intensifies local polarity and induces pronounced p – d hybridization, driving site-centered charge redistribution that enhances Li + affinity and interfacial electronic coupling for the Li 2 S x ( x = 4, 2, 1) conversion sequence and facilitates Li 2 S reactivation during charge. Benefiting from the synergy between the La–N 4 S 2 single atoms and the interconnected nanoflower-derived framework, La 2.5 –FSPAN retains 1262 mAh g −1 after 150 cycles at a sulfur loading of 4.5 mg cm −2 with E/S = 10 μL mg −1 , and delivers 769 mAh g −1 at 10C under a sulfur loading of 1.5 mg cm −2 . This work establishes polymerization-guided atomic engineering as a low-temperature route to accelerate solid–solid conversion in SPAN cathodes under practically relevant constraints. Download: Download high-res image (129KB) Download: Download full-size image
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高影响因子
Journal of Energy Storage
·
2024
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IF 8.9
Shentuo Zheng,Yikun Yi,Feng Hai,Xin Gao,Xiaolu Tian,Zhendi Wu,Jingyu Guo,Wei Tang,Weibo Hua,Long Qu,Mingtao Li
The development of high-voltage cobalt-free spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) by conventional solid-state methods is hampered by its rapid capacity decay due to the impurity phases, inhomogeneous particle size, and dissolution of transition metals. To realize large-scale production and application of LNMO, a two-step modified solid-state method with Mn 2 O 3 nanosheets as a precursor is proposed here. The resulting material (P-LNMO) shows a reduced rock salt impurity phase and enhanced ionic transport through a more uniform control of particle size. As a result, the cycling stability of the disordered LNMO is remarkably improved, where LNMO half-cell capacity retention is 89.5 % at ambient temperature after 1000 cycles. What's more, the LNMO/Graphite full-cell is further assembled showing a discharge specific capacity of 110 mAh g −1 at 1C, and remains 97 % of its initial capacity after 100 cycles. The excellent electrochemical performance indicates that this modified solid-state approach brings a new avenue to the synthesis of LNMO for the upcoming generation of commercial lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Defence Technology
·
2022
·
IF 4.035
Xiaogang Guo,Taotao Liang,Junfeng Guo,Huisheng Huang,Shuying Kong,Jianwei Shi,Binfang Yuan,Qi Sun
For solving the dilemma of the short exothermic life-span of WO 3 based metastable interstitial composites (MICs) with extensive application prospect, this paper has firstly designed the promising anti-wetting Al/WO 3 MICs via electrophoresis assembly of nano-Al and WO 3 particles fabricated by hydrothermal synthesis method, followed by the subsequent fluorination treatment. A combination of X ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FT-IR) techniques were utilized in order to characterize the crystal structure, microstructure, and elemental composition distribution of target films after different natural exposure tests. The product with uniform distribution and high purity possesses a high contact angle of ∼170° and a minute sliding angle of ∼1°, and displays the outstanding anti-wetting property using droplets with different surface tensions. It also shows great moisture stability in high relative-humidity circumstances after one year of the natural exposure experiment. Notably, the heat output of a fresh sample can reach up to 2.3 kJ/g and retain 96% after the whole exposure test, showing outstanding thermo-stability for at least one year. This work further proposed the mechanism of anti-wetting Al/WO 3 MICs considering the variation tendency of their DSC curve, providing a valuable theoretical reference for designing other self-protected MICs with a long exothermic life-span applied in wide fields of national defense, military industry, etc.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhi-Qiang Xu,Rong Zou,Wen-Wu Liu,Guang-Long Liu,Yun-Shou Cui,Yi-Xiao Lei,Ya-Wen Zheng,Wen-Jun Niu,You-Zhi Wu,Bing-Ni Gu,Ming-Jin Liu,Fen Ran,Yu-Lun Chueh
In this work, sulfurized polyacrylonitrile (SPAN) cathodes with atomically dispersed Co and Se active site, namely cobalt selenide doped-sulfide polyacrylonitrile (CoSe 2 - x @SPAN, x = 6, 10, 15) with different CoSe 2 doping concentrations of 6, 10, and 15 wt%, were fabricated by co-heating approach to strengthen the charge conductivity and catalytic activity of SPAN cathode. Atomic scale CoSe 2 were doped into the SPAN skeleton to expediating the redox kinetics of lithium storage process, and the catalytic mechanism was made clear by a viewing angle of frontier molecular orbital theory. The DFT calculation results show that CoSe 2 @SPAN has a more uniform electrostatic potential distribution with a smaller LUMO-HOMO band gap, which is more conducive to electron transport. The Co/Se loaded SPAN polymer constructed by N-Co-S chemical coordination improves the matching degree between the highest occupied molecular orbital (HOMO) of the nucleophile S 2− and the lowest unoccupied molecular orbital (LUMO) of the electrophile Li + during the discharge process, and effectively reduces the bonding orbital σ level of the deposited product Li 2 S, thereby promoting the lithium storage kinetics of CoSe 2 @SPAN cathode material and avoiding the shuttle effect. Meanwhile, the larger Gibbs free energy variation during the lithiation process indicates the enhanced reaction kinetics of the CoSe 2 @SPAN cathode. Ultimately, The Li-SPAN battery with CoSe 2 -10@SPAN cathode delivers high reversible capacity of 1475 mAh g −1 at 0.2 A/g, superior rate capability and long-term capacity retention of 71.1% after 500 cycles at 1.0 A/g. Accordingly, this study offers insights into the utilization of frontier molecular orbital theory (FMO) to improve the redox kinetics and sulfur utilization of Li-SPAN batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）