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Vitamin C Secondary-Doped Poly(3, 4-ethylenedioxythiophene): Poly(Styrene Sulfonate) for Enhancing Conductivity and Biocompatibility for Implantation

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advanced Functional materials 2025年

作者： Wang, Yumeng Wang, Xiangya Yu, Meimei Sun, Zhijiang Liu, Rui Zhou, Suting Zhang, Yuxia Ran, Fen State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

Poly(3, 4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) has garnered increasing attention due to its adjustable and enhanced electrical conductivity and ease of processing. However, for applications in bioelectronics as a conductive filler for the preparation of conductive hydrogels, further improvements in conductivity are necessary. In this study, an eco-friendly polar additive, vitamin C (VC), is introduced to simultaneously enhance the electrical conductivity and biocompatibility of PEDOT: PSS. The multiple hydroxy groups in VC impart polarity and facilitate hydrogen bonding with PSS, thereby removing excess non-conductive PSS not involved in polymerization and expanding the continuously conducting PEDOT-rich domains. Importantly, VC can regulate inflammatory factors by reducing reactive oxygen species levels, thereby effectively improving biocompatibility. Consequently, VC secondary-doped PEDOT: PSS shows potential for diverse applications due to its conductive properties, solubility, biocompatibility, and blood compatibility. A conductive hydrogel is prepared by incorporating conductive PEDOT: PSS-VC into a sodium alginate and guar gum hydrogel system. Supercapacitors with enhanced anticoagulant properties are assembled to address thrombosis, coagulation risks, and inflammatory responses in vivo. This eco-friendly doping strategy can be applied to develop high-performance, biocompatible, and implantable bioelectronics. © 2025 Wiley-VCH GmbH.

关键词： Semiconductor doping

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Dual-Aspect Control of Lithium Nucleation and Growth with Hydroxyapatite and Liquid Crystal Polymers for High-Performance Lithium Metal Batteries

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advanced Energy materials 2025年

作者： Miao, Xiang Wu, Zhouhan Hu, Wei Guo, Lin Nan, Ce-Wen School of Chemistry Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing100191 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China

Lithium (Li) metal is a promising anode material for next-generation high-energy-density batteries. However, safety concerns and the limited lifespan due to Li dendrite formation hinder its practical application. The complex dendrite formation process involves nonuniform nucleation and radial growth, requiring a holistic strategy to simultaneously regulate both processes. In this work, a dual-aspect control strategy is developed by designing a protective layer composed of hydroxyapatite (HA) and a liquid crystal polymer (LCP). Electrochemical, microstructural, and computational analyses revealed that HA provides homogenous Li0 adsorption sites, enhancing Li nucleation kinetics and uniformity. Meanwhile, the LCP self-assembles into cation-selective channels, promoting Li-ion diffusion and regulating growth direction. This dual-aspect control significantly improved Li plating kinetics and mitigated Li dendrite formation. Benefiting from this strategy, the symmetric cell achieved a critical current density of 5 mA cm−2 and maintained a lifespan of 500 h at 3 mA cm−2. Furthermore, in Li–sulfur batteries, the cell exhibited exceptional high-rate cycling performance (>10 mA cm−2) with an average capacity decay rate of only 0.056% over 1000 cycles. These results highlight the effectiveness of dual-aspect control in suppressing Li dendrites and improving high-rate cycling stability. © 2025 Wiley-VCH GmbH.

关键词： Liquid crystals

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Tris-based protic ionic liquids with multiple adsorption effects enabling excellent anti-wear and anti-corrosion performances

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Journal of Molecular Liquids 2025年 425卷

作者： Ge, Shanqin Chen, Long Li, Wei Cai, Qingzhao Gong, Genxiang Wu, Junhao Yu, Jinhong Nishimura, Kazuhito Jiang, Nan Cai, Tao School of Materials Science and Chemical Engineering Ningbo University Zhejiang Ningbo315211 China State Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Advanced Nano-processing Engineering Lab Mechanical Engineering Kogakuin University Tokyo192-0015 Japan

Molecular additives have garnered widespread attention in the fields of lubrication and corrosion protection due to their designable interfacial film-forming efficiency. Herein, three protic ionic liquids (PILs) with the same cation but different anions have been designed and synthesized. Their physicochemical properties, tribological properties and anti-corrosion properties were systematically investigated. Results demonstrated that under dynamic steel-on-steel friction conditions, the PILs can maximally reduce the running-in period, friction coefficient, and wear rate by 90 %, 40 %, and 97 %, respectively, compared to the commercial ionic liquid, BMIMPF6. Under static copper corrosion conditions, the PILs efficiently adsorb onto the copper surface and formed a dense oxide layer on its surface, thus achieving excellent corrosion protection for the copper substrates. Molecular dynamics (MD) simulation results indicate that the exceptional lubricity of PILs is due to its ability to rapidly adsorb onto the metal surface through multiple interaction sites on both its anionic and cationic components, thereby reducing the running-in period and swiftly establishing a lubricating film. This study provides insights into the development of molecular additives featuring multiple adsorption sites, with potential applications in the fields of tribology and corrosion engineering. © 2025

关键词： Tribology

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Low Pressure Chemical Vapor Deposited Perovskite Enables all Vacuum-Processed Monolithic Perovskite-Silicon Tandem Solar Cells

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advanced Energy materials 2025年

作者： Zhang, Yuxi Zhu, Yanqing Sun, Jingsong Hu, Min Chen, Jiahui Duan, Bingxin Hu, Shenghan Hou, Peiran Tan, Wen Liang Ku, Zhiliang Yang, Weiguang Lu, Jianfeng State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China Zhejiang Baima Lake Laboratory Co. Ltd. Zhejiang Hangzhou310000 China School of Electronic and Electrical Engineering Hubei Province Engineering Research Center for Intelligent Micro-Nano Medical Equipment and Key Technologies Wuhan Textile University Wuhan430200 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China ClaytonVIC3168 Australia Solar Technology Co. Ltd. Jiangsu Taizhou225500 China

Low-pressure chemical vapor deposition (CVD) is a promising technique for metal halide perovskite photovoltaics fabrication due to its low manufacturing cost, conformal coverage, and high scalability for industry-scale fabrication. However, the lack of knowledge of the reaction kinetics makes the solar cell performance lag behind its solution-processed counterpart. Herein, the perovskite formation and crystal growth process in the CVD process are studied by unraveling the mechanism of ion diffusion via tracking the vapor–solid reaction with various semi-in-situ characterizations. It is found that Cs+ can migrate along the perovskite lattice and uniformly distribute in the vertical direction of the final perovskite film even changing the deposition order of CsBr and PbI2 in the solid source, whereas this order can significantly affect the growth kinetics and the bandgap of the perovskite. Depositing CsBr before PbI2 results in a faster conversion of inorganic precursors to perovskite phase, yielding a wider bandgap perovskite. Finally, we fabricated semi-transparent perovskite cells using all-vapor deposition process, which showed a champion efficiency of 18.7% and it retained ≈94% of its initial performance after 200 h of continuous operation. Moreover, using this all-vapor deposition process, we achieved a champion efficiency of 26.9% for monolithic perovskite-silicon tandem solar cells. © 2025 Wiley-VCH GmbH.

关键词： Low pressure chemical vapor deposition

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Quick preparation and thermal transport properties of nanostructured β-FeSi_2 bulk material

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Chinese Physics B 2009年第1期18卷 287-292页

作者：李涵唐新峰曹卫强张清杰 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

This paper reports that the nanostructured β-FeSi2 bulk materials are prepared by a new synthesis process by combining melt spinning （MS） and subsequent spark plasma sintering （SPS）. It investigates the influence of linear speed of the rolling copper wheel, injection pressure and SPS regime on microstructure and phase composition of the rapidly solidified ribbons after MS and bulk production respectively, and discusses the effects of the microstructure on thermal transport properties. There are two crystalline phases （α-Fe2Si5 and ε-FeSi） in the rapidly solidified ribbons; the crystal grains become smaller when the cooling rate increases （the 20 nm minimum crystal of ε-FeSi is obtained）. Having been sintered for 1 min above 1123K and annealed for 5min at 923K, the single-phase nanostructured β- FeSi2 bulk materials with 200-500 nm grain size and 98% relative density are obtained. The microstructure of β-FeSi2 has great effect on thermal transport properties. With decreasing sintering temperature, the grain size decreases, the thermal conductivity of β-FeSi2 is reduced remarkably. The thermal conductivity of β-FeSi2 decreases notably （reduced 72% at room temperature） in comparison with the β-FeSi2 prepared by traditional casting method.

关键词： thermoelectric materials nanostructure thermal conductivity

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Industrial applicable, Be-Ni-free Y-doped Zr-based bulk metallic glasses with high glass-forming ability and superior mechanical properties

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Journal of Alloys and Compounds 2025年 1027卷

作者： Fu, X.Q. Li, C.Y. Gao, K. Zhu, X.G. Li, X.S. Pei, C.Q. Zhou, J. Kou, S.Z. Sun, B.A. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Gansu Lanzhou730050 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China Dongguan Yihao Metal Material Technology Co LTD Guangdong Dongguan523686 China

Zr-based bulk metallic glasses (BMGs) exhibit significant potential for a wide range of applications, owing to their exceptional glass-forming ability (GFA) and mechanical properties. However, while the addition of beryllium (Be) or rare-earth elements can improve the GFA of Zr-based BMGs, it often raises safety concerns or compromises their mechanical performance, limiting their industrial applicability. Therefore, the development of Be-Ni-free Zr-based BMGs with both superior GFA and mechanical properties remains a considerable challenge. In this study, we successfully prepared an industrially applicable Be-Ni-free (Zr61Ti2Cu25Al12)100-xYx BMG via Y-doping, demonstrating high GFA and excellent mechanical properties. We found that trace Y-doping significantly enhances both GFA and plasticity, with Y0.1 achieving a critical diameter of 13 mm and Y0.3 exhibiting a remarkable compressive strain of 18.91 %. Additionally, using the (Zr61Ti2Cu25Al12)100-xYx BMGs, we successfully fabricated industrial BMGs plates with thicknesses of 2 mm via high-vacuum, high-pressure die casting (HV-HPDC). The industrial BMGs plates of Y0.3 also exhibited the unexceptionable flexural strength of the 2.46 GPa. This work provides a novel approach for the exploration of BMGs for industrial applications and represents a significant step toward their commercialization and structural use. © 2025 Elsevier B.V.

关键词： Machinability

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Realization of non-equilibrium process for high thermoelectric performance Sb-doped Ge Te

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Science Bulletin 2018年第11期63卷 717-725页

作者： Evariste Nshimyimana Xianli Su Hongyao Xie Wei Liu Rigui Deng Tingting Luo Yonggao Yan Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Pristine GeTe shows inferior thermoelectric performance around unit due to the large carrier concentration induced by the presence of intrinsic high concentration of Ge vacancy. In this study, we report a thermoelectric figure of merit ZT of 1.56 at 700 K, realized in Sb-doped GeTe based thermoelectric(TE)materials via combined effect of suppression of intrinsic Ge vacancy and Sb doping. The nonequilibrium nature during melt spinning process plays very important role. For one thing, it promotes the homogeneity in Ge_(1-x)Sb_xTe samples and refines the grain size of the product. Moreover the persistent Ge precipitated as impurity phase in the traditional synthesis process is found to be dissolved back into the GeTe sublattice, accompanying with a drastic suppression of Ge vacancies concentration which in combination with Sb electron doping significantly reduced the inherent carrier concentration in *** carrier concentration, approaching the optimum carrier concentration ～3.74 × 10^(-20) cm^(-3) and a high power factor of 4.01 × 10^(-3) W m^(-1)K^(-2) at 750 K are achieved for Ge_(0.98)Sb_(0.02) Te sample. In addition,the enhanced grain boundary phonon scattering by refining the grain size through melt spinning(MS)process, coupled with the intensified alloying phonon scattering via Sb doping leads to low thermal conductivity of 1.53 W m^(-1) K^(-1) at 700 K for Ge_(0.94) Sb_(0.06) Te sample. All those contribute to a high ZT value,representing over 50% improvement in the ZT value compared to the Sb free samples, which provides an alternative way for ultrafast synthesis of high performance GeTe based thermoelectric material.

关键词： GeTe Sb doping MS-SPS process Thermoelectric properties

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Phase transition and high temperature thermoelectric properties of copper selenide Cu_(2-x) Se (0 ≤ x ≤ 0.25)

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Chinese Physics B 2011年第8期20卷 340-347页

作者：肖星星谢文杰唐新峰张清杰 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

With good electrical properties and an inherently complex crystal structure, Cu2-xSe is a potential ＂phonon glass electron crystal＂ thermoelectric material that has previously not attracted much interest. In this study, Cu2-xSe （0 ≤ x ≤0.25） compounds were synthesized by a melting-quenching method, and then sintered by spark plasma sintering to obtain bulk material. The effect of Cu content on the phase transition and thermoelectric properties of Cu2-xSe were investigated in the temperature range of 300 K-750 K. The results of X-ray diffraction at room temperature show that Cu2-xSe compounds possess a cubic structure with a space group of Fm3m （#225） when 0.15 〈 x ≤ 0.25, whereas they adopt a composite of monoclinic and cubic phases when 0 ≤x ≤ 0.15. The thermoelectric property measurements show that with increasing Cu content, the electrical conductivity decreases, the Seebeck coefficient increases and the thermal conductivity decreases. Due to the relatively good power factor and low thermal conductivity, the nearly stoichiometric Cu2Se compound achieves the highest ZT of 0.38 at 750 K. It is expected that the thermoelectric performance can be further optimized by doping appropriate elements and/or via a nanostructuring approach.

关键词： copper selenide phase transition thermoelectric properties

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Charge and spin instabilities in superconducting La3Ni2O7

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Physical Review B 2025年第1期111卷 014515-014515页

作者： Xuejiao Chen Peiheng Jiang Jie Li Zhicheng Zhong Yi Lu National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Photoelectric Engineering Changzhou Institute of Technology Changzhou Jiangsu 213002 China School of Physics MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an 710049 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Motivated by the recent discovery of superconductivity in La3Ni2O7 under high pressure, we explore its potential charge and spin instabilities through combined model analysis and first-principles calculations. Taking into account the small charge-transfer nature of high valence nickel, a fully correlated two-cluster model identifies a lattice-coupled charge instability characterized by substantial short-range fluctuations of oxygen holes. This periodicity-two instability is corroborated by density functional theory plus U calculations that also reveal a strong tendency towards concurrent antiferromagnetic ordering. The charge, spin, and associated lattice instabilities are significantly suppressed with increasing external pressure, contributing to the emergence of superconductivity in pressurized La3Ni2O7. Carrier doping and chemical substitution at the La site is found to effectively suppress these instabilities, suggesting a viable strategy to stabilize a superconducting phase under ambient pressure.

关键词： Charge transfer

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Organic–inorganic S-scheme heterojunction photocatalysts: Design, synthesis, applications, and challenges

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eScience 2025年第3期5卷

作者： Cheng, Jingzhao Cheng, Bei Xu, Jingsan Yu, Jiaguo Cao, Shaowen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Wuhan 430070 China School of Chemistry and Physics Queensland University of Technology Brisbane QLD Australia Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430078 China

Since the concept was introduced in 2019, step-scheme (S-scheme) heterojunctions have emerged as an important subclass of heterojunction technology and attracted much attention for solar energy conversion. S-scheme heterojunctions are capable of maximizing redox ability through conferring enhanced photocatalytic performance by addressing the problem of rapid electron–hole recombination. In particular, the organic–inorganic S-scheme heterojunction (OI-SHJ) can integrate atomic long-range ordered inorganic semiconductors with tailored organic materials using diverse organic molecular building blocks and integration methods, offering brilliant prospects for innovation. Here, we review the state-of-the-art progress in OI-SHJ photocatalysts by introducing their charge transfer mechanism, design criteria, preparation approaches, and applications. We also highlight the synergistic role of organic and inorganic materials in S-scheme heterojunctions and what is understood so far about their structure–activity relationship. We conclude by summarizing the existing challenges and emphasizing the current outlook for the future development of OI-SHJ photocatalysts. © 2024 The Authors

关键词： Energy conversion Organic–inorganic Photocatalysis S-scheme

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