ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 44
·2509658
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IF 19
Chaoqiang Tan,Zeyu Shen,Shichao Zhang,Zhijun Wu,Shengnan He,Hongge Pan,Hao Cheng,Yingying Lu
Sulfurized polyacrylonitrile (SPAN) recently emerges as a prospective cathode for lithium–sulfur (Li–S) batteries owing to its high S utilization, remarkable cycling stability, and liberty from shuttle effect. Despite weakly solvating ether electrolytes exhibiting simultaneously compatibility for SPAN cathode and lithium (Li) anode, they universally suffer from low ionic conductivity and narrow liquid-phase temperature range. However, conventional ether-based electrolytes with excellent ionic conductivity cannot realize reversible solid–solid conversion of SPAN cathode due to Li polysulfide intermediates (LiPSs) dissolving and shuttling. Here, a series of weakly solvating ethers are evaluated by selectively methylating dimethoxymethane (DMM) to fine-tune their solvation capability and liquid-phase temperature range. Enlightened from weakly solvating ether electrolytes, the contact ion pair (CIP)-dominated electrolyte is designed for satisfactory ionic conductivity of electrolyte and reversible solid–solid conversion of SPAN cathode over wide temperature range. The reinforcement mechanisms of the CIP-dominated electrolyte for the Li anode and SPAN cathode are comprehensively elucidated through experimental characterizations and molecular dynamics simulations. Based on the optimized electrolyte, Li||SPAN full cells can steadily operate over wide temperature range from −20 to 60 °C. Furthermore, the 120 mAh Li||SPAN pouch cell can exhibit 85.5% capacity retention after 45 cycles at 0.2 C.
研究领域:
电化学
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能源材料
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锂离子电池
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电极界面化学
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电解质工程
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分子动力学模拟
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianguang Wang,Jinsong Zeng,Pengfei Li,Fugang Hu,Hao Yang,Jianqiao Su,Daxian Cao,Kefu Chen
Responsive ionic hydrogels with switchable stiffness exhibit broad potential for practical applications. However, the presence of hydration layers presents significant challenges in optimizing the performance of these materials. In this manuscript, we report a strategy for converting the hydration layer of ionic hydrogels into a transitional layer. This enables isochoric and reversible switching between soft ionic hydrogels and rigid polymers by adjusting phase separation, accompanied by a gigantic stiffness change from approximately 0.36 MPa to 694.90 MPa. By analyzing these mechanical responses during continuous phase separation, we identified a three-stage evolution pattern: transitioning from a soft state to a tough state, and ultimately to a robust state. Meanwhile, research has demonstrated that the presence of a transition layer not only ensures uniform stress distribution and defect-free structures in ionic hydrogels at low stiffness levels but also significantly enhances the dimensional stability, mechanical integrity, and fatigue resistance of the polymer network during stiffness-switching. This ultimately facilitates the successful fabrication of polymer materials with a broad range of tunable stiffness and enhanced toughness. This work presents a novel strategy for integrating transitional layers into ionic hydrogels, underscoring their potential for applications requiring isochoric and a broad range of adjustable stiffnesses.
研究领域:
材料科学
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高分子化学
·
力学性能研究
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DOI
高影响因子
Matter
·
2025
·
IF 17.5
Jie Shen,Yun Wang,Min Yao,Shubo Liu,Zhiguang Guo,Li Zhang,Ben Wang
Lumbar puncture is a minimally invasive technique for delivering drugs into cerebrospinal fluid (CSF). However, its effectiveness is limited by the spine’s extensive length and the narrow, complex CSF spaces, which hinder efficient passive diffusion of therapeutic agents. Here, we have engineered a differentiable stem cell-assembled soft robot (SCASR) by using a three-dimensional self-assembly process in liquid marbles. These biologically viable robots can interface with the tissues inside the CSF, adapting to the complex surroundings while navigating. With X-ray imaging and magnetic actuation, the SCASRs can be guided toward targeted regions. The SCASRs autonomously disassemble into individual cells, which then differentiate into neural cells to facilitate the restoration of neural connections, thereby aiding the recovery of paralyzed lower limbs. The proposed strategy provides an imaging-based therapeutic system for nerve injury, enabling accessibility of hard-to-reach spinal regions and facilitating efficient therapy in minimally invasive manner, by means of soft microrobots.
研究领域:
生物医学工程
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神经科学
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干细胞研究
·
机器人学
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治疗系统
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 33
·24986-24994
·
IF 2.779
Cheng Li-Qian,Jiang Guozheng,Ma Zhenhua,Xu Ze,Yu Minghao,Lu Jingtong,Chen Kai
Al-doped BaZr 0.2 Ti 0.8 O 3 (BZT20) ceramics were prepared by solid-state sintering, and the relaxation degree of phase transition was tailored effectively. The microstructure, dielectric properties, ferroelectric properties, and electrocaloric (EC) performance of Al 2 O 3 -doped BZT20 ceramics were studied, respectively. The results show that Al 2 O 3 doping induces changes in Curie temperature and dielectric properties. When the additive amount of Al 2 O 3 is 1.25 at.%, the Curie temperature drops to around room temperature (RT), and the dielectric loss is lower than that of pure BZT20 ceramics. The diffusion constant γ reaches a minimum value of 1.57 when the Al 2 O 3 content is 1.25 at.%, indicating that a relatively large latent heat would be gathered while there is a phase transition. As a result, an enhanced EC response of ∆ T max = 0.293 K near RT is obtained when the Al 2 O 3 content is 1.25 at.%, which is 1.6 times that of pure BZT20. It is also impressive that a wide working temperature range can be obtained, that is, T span = 73 K for BZT20 ceramics with 1 at.% of Al 3+ ionic content.
研究领域:
材料科学
·
物理学
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Rui Gao,Shen Zhang,Hailong Liu,Zhizhou Yang,Yue Wu,Sheng Gao,Mei Li,Hanlin Shao,Mingjie Wu
Disposal of dye-contaminated wastewater has become an imperative issue. Synthesis of novel materials for larger-capacity removal of those contaminants assisting by special interaction is a significant challenge. In this paper, a series of hyper-crosslinked poly 9-bromophenanthrene hybrids (HCPs) were synthesized by combination of 9-bromophenanthrene (9BP) and octavinylsilsesquioxane (OVS) via Friedel-Crafts alkylation reaction. The synthesized HCPs were well characterized. The results illustrated that HCPs were porous polymer hybrids consisting of micropores and mesopores with the apparent surface areas ( S BET ) in range of 980.0–1010.6 m 2 g −1 , and the micropore and mesopore widths located at 1.42 and 4 nm. Dye adsorption disclosed that the adsorbed amounts of rhodamine B (RB) and Congo red (CR) on HCP-2 respectively arrived at 2646.0 ± 37.4 and 1550.0 ± 38.5 mg g −1 , ascribing to the interactions of pore filling, hydrogen bonds, π π stacking, electrostatic attraction, especially the C Br⋯π interaction between the resulting polymers and the dye molecules of RB and CR. Moreover, HCP-2 exhibited larger adsorbed amount of iodine vapor arriving at 179.9 ± 2.6 wt%. This work provided an innovative strategy to design new adsorbents for larger-amount removal of contaminants from the environment.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 9
·5804-5816
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IF 3.9
Cheng Li-Qian,Wang Pengcheng,Li Qingna,Wang Zhiping,Jiang Yuqi,Zhu Dongze
The electrocaloric effect (ECE) has attracted considerable attention for its promising application in next-generation solid-state cooling systems due to its high efficiency, environmental friendliness, and potential for device miniaturization. In this study, rare-earth element Sm was introduced to dope in the relaxor ferroelectric ceramics based on 0.7 Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN–30PT) to enhance the ECE response and broaden the working temperature range. The Sm doping effectively enhanced the breakdown strength, reduced leakage current, and refined grain morphology was also observed, contributing to improved electrical reliability. The Sm-doped sample achieved an adiabatic temperature change of 1.38 K under an electric field of 40 kV cm −1 . Moreover, an inferred broad effective temperature span ( T span ) of 62 °C was obtained, indicating excellent wide temperature reliability. These results demonstrate that appropriate Sm doping not only enhances the EC response but also broadens its operational temperature window, offering valuable insights for the design of high-performance electrocaloric ceramics for energy-efficient and environmentally friendly solid-state cooling applications.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 10
·118293
·
IF 6.3
Xingjian Zou,Gengguang Luo,Wenrong Xiao,Xuetian Gong,Lulu Liu,Fangyuan Luo,Kanghua Li,Shenglin Jiang,Guangzu Zhang
Electrocaloric effect (ECE), a promising candidate for advanced solid-state refrigeration technology, faces fundamental limitations in simultaneously achieving large adiabatic temperature change (Δ T ) and broad working temperature span ( T span ). Here, we strategically designed a component system of Ba 1- x (Li 0.5 Sm 0.5 ) x Ti 1- y Zr y O 3 ( y BZT- x LS) which establishes the coexistence of multiple ferroelectric phases near room temperature. In this system, the heterovalent Li + /Sm 3+ doping at A-site induces relaxor behavior and promotes the coexistence of orthorhombic-tetragonal (O-T) phases around room temperature. Based on this, the addition of Zr 4+ at B-site further increases relaxation degree and constructs a broad temperature window with contiguous polymorphic phase transition, thereby facilitating the coexistence of rhombohedral-orthorhombic-tetragonal (R-O-T) phases. Direct ECE measurements on the optimized 0.02BZT-0.08LS composition reveal a maximum Δ T (Δ T max ) of 2.3 K at 40 °C and a broad T span (Δ T ≥ 90% Δ T max ) over the practical operating range from 20 to 70 °C.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Yuxuan Hou,Ruowei Yin,Junjie Li,Xiaopo Su,Chuanbao Liu,Yang Bai
Electrocaloric effect (ECE) is one of the basic features of ferroelectrics / antiferroelectrics. The positive ECE and negative ECE exhibit oppose thermal response to the variation of electric fields. This allows them to complement each other, enabling more diversified refrigeration regulation. To enhance the negative ECE and broaden its temperature range, this work investigates the impact of diffuse phase transitions in antiferroelectric Pb 1- x Sr x Zr 0.95 Ti 0.05 O 3 (PSZT) films on LaNiO 3 /Si substrates. Sr 2 + doping reduces the unit cell volume and enhances antiferroelectricity, resulting in an increment of the ECE Δ T from −2.26 K to −3.38 K. Meanwhile, it breaks the long-range antiferroelectric order to achieve a local symmetry breaking, and promotes the diffusion of the antiferroelectric-ferroelectric phase transition to significantly broaden the temperature span of the negative ECE from 33 K to over 108 K. This work demonstrates that controlling the phase transition diffusion in PSZT films effectively enhances the performance of the negative ECE and broadens its temperature span, providing a strong support for in-situ chip cooling technology.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 17
·
IF 1.64
Qianqian Zhai,Shigui Zhao,Chuanjian Zhou,Wenjie Li,Cun Peng
To verify the feasibility of the determination of the Si H content (HC) of hydrogen silicone oil (HS-oil) with Fourier transform near infrared (FT-NIR) spectroscopy and attenuated total reflectance (ATR)–Fourier transform infrared (FTIR) spectroscopy combined with the partial least squares regression (PLS-R) model, HS-oil samples were synthesized from concentrated hydrosilicone oil (HC = 1.4 wt %), octamethylcyclotetrasiloxane, and hexamethyldisiloxane or prepared by the dilution of concentrated hydrosilicone oil with octamethylcyclotetrasiloxane. The FT-NIR PLS-R model (8695–4000 cm −1 , two principal components) was developed from the FT-NIR spectral data, and the coefficient of determination for cross-validation ( R 2 ) and the coefficient of determination for external validation ( r 2 ) were 0.992 and 0.995, respectively. The ATR–FTIR PLS-R model (2302–2040 cm −1 , one principal component) was developed from the ATR–FTIR spectral data; it produced an R 2 of 0.995 and an r 2 of 0.996. This study demonstrated that the combination of FT-NIR and ATR–FTIR spectroscopy with the PLS-R model were successfully used to determine the HC of the HS-oil. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40694.
研究领域:
分析化学
·
高分子科学
·
光谱学
·
材料科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Lun Xu,Jun Ma,Baohua Li,Feiyu Kang
As an appealing storage system for electric vehicle application, the lithium-oxygen battery could theoretically provide ultrahigh energy density ; however, its attractive implementation is overshadowed by unsatisfactory electrochemical characteristics of the poor rate capability and the short span life. Here, we put forward one kind of effective strategy to ameliorate these deficiencies. By embedding a novel air electrode, the utilization level of the electrochemically available active sites is effectively increased and meanwhile the mass transfer of oxygen is signally improved. The evaporation speed of the solvent is greatly slowed down to some degree. We demonstrate that a super P-based lithium-O 2 battery could be operated over stable 50 cycles at the current density of 3000 mA g Carbon − 1 (equivalent to 2.4 mA cm −2 ), corresponding to a discharge time of about 20 min to 1000 mAh g Carbon − 1 . Based on the weight of the super P and the resultant Li 2 O 2 , the specific power density could reach 4040 W kg −1 ; even so, a substantial specific energy density of 1350 Wh kg −1 still could be achieved.
研究领域:
储能技术
·
电化学
·
电池技术
·
材料科学
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DOI
高影响因子
Green Energy & Environment
·
2025
·
IF 14.6
Tiao Huang,Shenglin Wang,Ming Wang,Hui Hu,Jianyi Wang,Xiaofang Su,Songtao Xiao,Jingyi Wu,Yanan Gao
Compared with the most advanced lithium-ion batteries, aqueous zinc-iodine batteries (Zn–I 2 batteries) have higher theoretical capacity and energy density, thus attracting much attention in energy storage. However, due to several technical issues, the commercialization of Zn–I 2 batteries is still at a bottleneck, and among them, the “shuttle effect” of polyiodide anions is considered to be a main challenge. In order to minimize the shuttle of polyiodide species within the cathode compartment, we herein synthesize a zinc-ion conductive covalent organic framework (COF), namely DMSBA-Tp-COF, that is used to assemble a composite separator together with commercial glass fiber (GF) substrate and graphene (Gr) by a simple vacuum filtration coating technology. The negatively charged –SO 3 − ions present in COF coatings enable homogeneous Zn 2+ flux and simultaneously suppress polyiodides shuttling in the Zn–I 2 batteries. As a result, the composite Gr@DMSBA-Tp-COF@GF separator endows the corresponding Zn–I 2 symmetrical cell with excellent long-term cyclic stability with a lifespan over 800 h and high-specific capacity of 3.2 mAh cm −2 (at a current density of 20 mA cm −2 , voltage rage of 0.7–1.7 V). This study provides a prospective strategy to rationally design functional COFs separator and accelerate their applications in high energy storage systems.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
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
危险品化学品经营许可证（带存储）