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Tuning ferroelectricity of polymer blends for flexible electrical energy storage applications

Science China materials 2021年第7期64卷 1642-1652页

作者： Xin Zhang Yanda Jiang Ruoqi Gao Xinhui Li Zhonghui Shen Bao-Wen Li Qingfeng Zhang Shujun Zhang Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Lab of Ferro&Piezoelectric Materials and Devices School of Materials Science&EngineeringHubei UniversityWuhan 430062China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNSW 2500Australia School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijing 100084China

Ferroelectric polymers are the mainstay of advanced flexible electronic *** to tailor the ferroelectric polymer films for various applications via simple processing approaches is *** we demonstrate the tuning of ferroelectric responses can be achieved in polymer blends of poly(vinylidene fluoride-trifluoroethylene)(P(VDF-TrFE))and polymethyl methacrylate(PMMA)prepared via a simple two-step *** proposed two-step process endows the polymer blends with a random distribution of P(VDF-TrFE)crystalline phase,hence decoupling the coherent ferroelectric domain interactions between continuous ordered crystalline phases that ubiquitously existed in common P(VDF-TrFE)*** incorporation of the miscible non-crystalline PMMA chains with low-polarity results in reversal dipoles and a transition from ferroelectric to antiferroelectric-like behavior,overcoming the trade-off between the polarization and depolarization *** particular,resultant excellent mechanical and electrical properties of the polymer blend films give rise to remarkably improved breakdown strength and energy storage performance,surpassing P(VDF-TrFE)and commercial biaxial-oriented polypropylene *** work provides a simple and effective strategy to tailor the ferroelectric response of polymeric materials with great potential for flexible electrical energy storage applications.

关键词： ferroelectric polymers antiferroelectricity energy density breakdown strength dielectric

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Bilayer metal halide perovskite for efficient and stable solar cells and modules

材料展望（英文）

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材料展望（英文） 2022年第4期 49-68页

作者： Yanqing Zhu Min Hu Mi Xu Bo Zhang Fuzhi Huang Yi-Bing Cheng Jianfeng Lu State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070People's Republic of China School of Electronic and Electrical Engineering Hubei Province Engineering Research Centre for Intelligent Micro-Nano Medical Equipment and Key TechnologiesWuhan Textile UniversityWuhan 430200People's Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216People's Republic of China Shanxi Lu'An Photovoltaics Technology Co. LtdChangzhi 046011People's Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216People's Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People's Republic of China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070People's Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216People's Republic of China

To reach the target of carbon neutral,a transition from fossil energy to renewable energy is *** technology is considered one of the most prominent sources of renewable ***,metal halide perovskite materials have attracted tremendous interest in the areas of optoelectronic devices due to their ease of processing and outstanding *** date,perovskite solar cells(PSCs)have shown high power conversion efficiency up to 25.7％and 31.3％for the perovskite-silicon tandem solar cells,which promises to revolutionize the PV ***,the stability of PSCs under operating conditions has yet to match state-of-the-art silicon-based solar cell technology,in which the stability of the absorbing layer and relevant interfaces is the primary *** issues become more serious in the larger area solar modules due to the additional interfaces and more defects within the *** perovskite film composed of a thin low dimensional perovskite layer and a three-dimensional perovskite layer shows great potential in fabricating solar cells with high efficiency and stability *** this review,recent advancements,including composition design and processing methods for constructing bilayer perovskite films are *** then analyze the challenges and resolutions in deposition bilayer perovskite films with scalable *** summarizing the beneficial effect of the bilayer structure,we propose our thinking of feasible strategies to fabricate high efficiency perovskite solar modules with a long ***,we outline the directions for future work that will push the perovskite PV technology toward commercialization.

关键词： perovskite solar cell perovskite solar module bilayer stability scalable technique

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Hierarchically Structured Ferric Oxides Derived from Fe-MOF-5-Wood for Scalable Cathodic H2O2Electrochemical Synthesis

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ACS Sustainable Chemistry & Engineering 2025年第22期13卷 8266-8277页

作者： Chaocheng Liu Di Liu Qiliang Fu Yan Wang Yuyi Zhang Yue Yang Tianjie Han Zhiyun Qian Yao Luo Wenhao Ji Hui Pan Zhouguang Lu Detao Liu State Key Laboratory of Advanced Papermaking & Paper-based Materials School of Light Industry and Engineering South China University of Technology Wushan Rd. 381# Tianhe District Guangzhou Guangdong 510640 China Institute of Applied Physics and Materials Engineering University of Macau SAR Macau 999078 P. R. China College of Materieals Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China；Scion 49 Sala Street Private Bag 3020 Rotorua 3046 New Zealand Department of Materials Science and Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials Southern University of Science and Technology of China Shenzhen 518055 P. R. China

Existing fossil-fuel-derived electrocatalysts still pose huge challenges in terms of cost-effective operation, safety, renewability, and ecological sustainability. Here, we demonstrate a simple effective strategy to construct a nanostructured wood-Fe-MOF-5 as a high-performance electrocatalyst for the air-cathodic electrosynthesis of scalable H2O2. Through coordinating of organic iron into regular MOF-5 in situ growing around the abundant oxygen-containing xylem cell walls vertically aligned within natural wood, we obtain a unique biconical hexagonal prism Fe-MOF-5 structure with a high specific surface area. The rapid gasification of Zn2+pyrolytically dissociated from wood-Fe-MOF-5 modulates the catalytic electron structure of micro-mesoporous hollow ferric oxides (50–200 nm, hybrid Fe2O3/Fe3O4), enabling abundant carbon defects and oxygen vacancies offered by unsaturated coordinated Fe–O4. This catalyst achieves a highly selective 2e–oxygen reduction reaction (84.5%), boosting H2O2production to 264.0 mg L–1in the cathodic chamber using ambient air. Its production efficiency surpasses that of existing biochar-based electrocatalysts by up to 100 times. This strategy shows also universality to other lignocellulosic wastes such as bamboo and corn straw, manifesting also a huge potential in scalable H2O2production.

关键词： electro-Fenton electrocatalysts Fe-MOF-5 hydrogen peroxide natural wood

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Effect of Strain Rates on Mechanical Behavior, Microstructure Evolution and Failure Mechanism of Extruded-Annealed Az91 Magnesium Alloy Under Room-Temperature Tension

SSRN

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SSRN 2023年

作者： Chai, Fang Ma, Zhiyuan Han, Xinghui Hu, Xuan Chang, Zhenyu Zhou, Jianxin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China Hubei Engineering Technology Center for New Energy and Intelligent Connected Vehicles Wuhan University of Technology Wuhan China Hubei Longzhong Laboratory Hubei Xiangyang441000 China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

Loading rate is usually considered as a significant factor affecting formability of AZ91 magnesium alloy structural components. Herein, uniaxial tensile tests are conducted on extruded-annealed AZ91 alloy under room temperature with strain rates ranging from 1×10-4 s-1 to 1×10-2 s-1. The mechanical properties, microstructure characteristics, and fracture morphologies tensioned at these different strain rates are investigated. Meanwhile, deformation process and atomic microstructures during uniaxial tensile loading is examined through molecular dynamics simulation. Extruded-annealed AZ91 magnesium alloys exhibits a positive strain-rate dependence of strength and a negative strain-rate dependence of elongation, and both strain rate sensitivity and strain-hardening rate under higher strain rate are much higher than those under lower strain rate. The larger strength at higher strain rate is mainly attributed to the more rapid accumulation of dislocation and the larger dislocation density, and the lower elongation at higher strain rate is mostly owing to the more elevated level of inhomogeneous deformation related with dislocations accumulation. As strain rate increases, the area fraction of basal texture increases while that of prismatic and pyramid texture decreases in tensioned samples, which is associated with the dominant room-temperature deformation mode of basal-slip-induced lattice rotation. With tension strain rate increasing, there are three kinds of fracture modes including ductile facture with more and deeper dimples at low strain rate, ductile-brittle facture with some dimples and cleavage planes at mediate strain rate and brittle facture with dominant cleavage planes at high strain rate. © 2023, The Authors. All rights reserved.

关键词： Room temperature

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Persistent Josephson tunneling between Bi2Sr2CaCu2O8+x flakes twisted by 45∘ across the superconducting dome

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Physical Review B 2023年第17期108卷 174508-174508页

作者： Yuying Zhu Heng Wang Zechao Wang Shuxu Hu Genda Gu Jing Zhu Ding Zhang Qi-Kun Xue Beijing Academy of Quantum Information Sciences Beijing 100193 China Hefei National laboratory Hefei 230088 China State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China National Center for Electron Microscopy in Beijing School of Materials Science and Engineering Key Laboratory of Advanced Materials (MOE) The State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China Ji Hua Laboratory Foshan Guangdong 528200 China Condensed Matter Physics and Materials Science Department Brookhaven National Laboratory Upton New York 11973 USA RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan Southern University of Science and Technology Shenzhen 518055 China

There is a heated debate on the Josephson effect in twisted Bi2Sr2CaCu2O8+x flakes. Latest results suggest the presence of either anomalously isotropic pairing or exotic d+id-wave pairing, in addition to the commonly believed d-wave one. Here, we address this controversy by fabricating ultraclean junctions with uncompromised crystalline quality at the junction interface. In the optimally doped regime, we obtain prominent Josephson coupling (2–4 mV) in multiple junctions with the twist angle of 45∘, in sharp contrast to a recent report that shows two orders of magnitude suppression around 45∘ from the value at 0∘. We further extend this study to the previously unexplored overdoped regime and observe pronounced Josephson tunneling at 45∘ together with Josephson diode effect up to 50 K. Our study helps establish the persistent presence of an isotropic pairing component across the entire superconducting phase diagram.

关键词： Josephson effect Pairing mechanisms Superconducting phase transition Cuprates Diodes High-temperature superconductors Monolayer films Superconducting devices Twisted heterostructures

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Control the Explosive Polymerization of 1,3-Dioxolane in Lipf6 Electrolyte by Lewis Acid-Base Interactions

SSRN

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SSRN 2024年

作者： Yang, Xueting Deng, Haoyu Xu, Jie Ye, Dezhan Jiang, Xiancai Chen, Yazhou Liu, Zengjin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University No.1 Yangguang Avenue Jiangxia District Hubei Wuhan430200 China School of Materials Science and Engineering Wuhan Textile University No.1 Yangguang Avenue Jiangxia District Hubei Wuhan430200 China School of Chemical Engineering Fuzhou University Fuzhou350108 China Drug Research Center of Integrated Traditional Chinese and Western Medicine Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University No.182 Chunhui Road Longmatan District Sichuan Province Luzhou City646000 China

In order to initiate1,3-dioxolane (DOL) polymerization, catalyst amount of lithium hexafluorophosphate (LiPF6) is usually used rather than as the main lithium salt. Replacement of Lithium bis(trifluoromethanesulphonyl)imide with LiPF6 would bring the heat explosion and high viscosity when DOL is mixed with 0.9M LiPF6 electrolyte. Here, based on the Lewis acid-base interaction, Lewis base from pyridine, is added to control the explosive polymerization of DOL in LiPF6 electrolyte. Through tuning the pyridine content, the gelling process and electrochemical properties are controlled. It is demonstrated that monomer conversion and electrochemical window stability are inversely related with the pyridine addition, which are up to 85.2% and 4.5V, respectively. The optimized conductivity and transfer number are 0.99×10-3 S/cm (25oC) and 0.68, respectively. The stable interface between PDOL and lithium metal anode is proved by the stable over-potential (50mv, 700 hours) at current density of 0.5 mA cm−2. After 500 cycles at 2 C, the assembled Li/PDOL@py0.125/LiFePO4 battery delivers 115 mAh/g and 90% capacity retention, with high average Coulombic efficiency of 99.83%. The present results demonstrate the heat suppression role of pyridine toward mixing DOL with 0.9M LiPF6 electrolyte, which solves the heat and viscosity problems for PDOL based gelling polymer electrolytes. © 2024, The Authors. All rights reserved.

关键词： Lithium compounds

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Hypervalent Potassium Xanthate Modified Sno2 for Highly Efficient Perovskite Solar Modules

SSRN

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SSRN 2022年

作者： Lu, Jianfeng Lv, Pin Yang, Yufei Li, Neng Zhang, Yuxi Hu, Min Huang, Bo Zhu, Yanqing Li, Bin Pan, Junye Wang, Shifeng Huang, Fuzhi Cheng, Yi-Bing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 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 Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Foshan528216 China Innovation Laboratory of Materials for Energy and Environment Technologies Institute of Oxygen Supply Tibet University Lhasa850000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Tin oxide (SnO2) has been demonstrated as a promising electron transport material for high efficiency perovskite solar cells (PSCs) that made entirely via solution processing at low temperature (2|perovskite lead to a large voltage loss and performance variation. Herein, we present a facile and effective method to simultaneously reduce the interfacial defects and enhance the charge transfer via modification of SnO2 by hypervalent potassium xanthate. The presence of Lewis acidic centers of the sulfur ligands, gives rise to a strong hypervalent interactions with both Pb2+ on the perovskite and Sn4+ on the SnO2 surface, which accelerates the interfacial charge transfer and suppresses the recombination reaction. As a result, solar cells with a power conversion efficiency of 23.4% with negligible hysteresis are fabricated in light of significantly increased voltage in comparison with the relevant controls. Moreover, a stabilized efficiency of 18.8% for large-area (active area: 48.0 cm2) perovskite solar modules is achieved. The modules retain 90% of their initial performance after aging at ambient for 600 hours, which is substantially improved in comparison with the modules based on pristine SnO2 © 2022, The Authors. All rights reserved.

关键词： Perovskite solar cells

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High salinity brine zero liquid discharge enabled by fabric-based evaporator with heterogeneous ion diffusion

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Separation and Purification technology 2025年 376卷

作者： Lei Zhuo Zhixun Zhang Zixiao Liu Xingfang Xiao Qian Zhang Yuanfeng Wang Weilin Xu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 China Department of Materials Science and Engineering University of California Los Angeles Los Angeles CA 90095 USA

Designing solar evaporators with efficient water transport pathways represents an innovative solution for industrial brine wastewater desalination and resource recovery. However, many existing approaches struggle to sustain performance under high-salinity conditions, posing significant challenges for practical applications. Herein, we report a fabric-based evaporator with heterogeneous ion diffusion (FEHID) designed for zero liquid discharge (ZLD) desalination of high-concentration saline water. Constructed using pyrrole modified cotton fabric with distinct plain and tubular patterns, the FEHID exploits heterogeneous ion diffusion to control salt crystallization while achieving a photothermal conversion efficiency of 92.6 % under one sun illumination. The tubular sections enhanced water supply via capillary action, directing saline water flow and promoting localized salt crystallization in plain regions for easy collection. Additionally, the water supply regulated temperature of the evaporator, thereby maximizing thermal utilization efficiency. The FEHID achieved an evaporation rate of 1.53 kg·m −2 ·h −1 for 15 wt% saline water under one sun illumination, which was accomplished by adjusting the number of filled yarns, maintaining stable performance during an 8-hour desalination test. Outdoor experiments further demonstrated superior evaporation efficiency and salt resistance over seven days, with freshwater output exceeding 10.5 L·m −2 ·d −1 . The scalable, industrially manufacturable design highlights FEHID as a viable approach for sustainable saline wastewater treatment and resource recovery.

关键词： Fabric-based evaporator Heterogeneous ion diffusion Localized crystallization Photothermal conversion Zero liquid discharge desalination

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Linker Mediated Electronic-state Manipulation of Conjugated Organic Polymers Enabling Highly Efficient Oxygen Reduction

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Angewandte Chemie 2024年第26期136卷

作者： Rui Ma Chenglong Tang Yonglin Wang Xiaoxue Xu Prof. Mingjie Wu Prof. Xun Cui Prof. Yingkui Yang State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 China School of Chemistry and Materials Science South-Central Minzu University Wuhan 430074 China

Conjugated polymers with tailorable composition and microarchitecture are propitious for modulating catalytic properties and deciphering inherent structure-performance relationships. Herein, we report a facile linker engineering strategy to manipulate the electronic states of metallophthalocyanine conjugated polymers and uncover the vital role of organic linkers in facilitating electrocatalytic oxygen reduction reaction (ORR). Specifically, a set of cobalt phthalocyanine conjugated polymers (CoPc-CPs) wrapped onto carbon nanotubes (denoted CNTs@CoPc-CPs) are judiciously crafted via in situ assembling square-planar cobalt tetraaminophthalocyanine (CoPc(NH 2 ) 4 ) with different linear aromatic dialdehyde-based organic linkers in the presence of CNTs. Intriguingly, upon varying the electronic characteristic of organic linkers from terephthalaldehyde (TA) to 2,5-thiophenedicarboxaldehyde (TDA) and then to thieno/thiophene-2,5-dicarboxaldehyde (bTDA), their corresponding CNTs@CoPc-CPs exhibit gradually improved electrocatalytic ORR performance. More importantly, theoretical calculations reveal that the charge transfer from CoPc units to electron-withdrawing linkers (i.e., TDA and bTDA) drives the delocalization of Co d-orbital electrons, thereby downshifting the Co d-band energy level. Accordingly, the active Co centers with more positive valence state exhibit optimized binding energy toward ORR-relevant intermediates and thus a balanced adsorption/desorption pathway that endows significant enhancement in electrocatalytic ORR. This work demonstrates a molecular-level engineering route for rationally designing efficient polymer catalysts and gaining insightful understanding of electrocatalytic mechanisms.

关键词： linker engineering electronic-state manipulation cobalt phthalocyanine conjugated polymer oxygen reduction reaction

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Anomalous Nernst Effect in an Antiperovskite Antiferromagnet

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Physical Review Applied 2022年第2期18卷 024007-024007页

作者： Yunfeng You Hei Lam Caihua Wan Chunlei Wan Wenxuan Zhu Lei Han Hua Bai Yongjian Zhou Leilei Qiao Tongjin Chen Feng Pan Junwei Liu Cheng Song Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Physics Hong Kong University of Science and Technology Hong Kong 00852 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The anomalous Nernst effect (ANE), the generation of a transverse electric voltage by a longitudinal temperature gradient, has attracted increasing interest from researchers recently, due to its potential in thermoelectric power conversion and close relevance to the Berry curvature of the band structure. Avoiding the stray field of ferromagnets, the ANE in antiferromagnets (AFMs) has the advantage of realizing highly efficient and densely integrated thermopiles. Here, we report the observation of the ANE in an antiperovskite noncollinear AFM, Mn3SnN, experimentally, which is triggered by the enhanced Berry curvature from Weyl points located close to the Fermi level. Considering that antiperovskite Mn3SnN has a rich magnetic phase transition, we modulate the noncollinear AFM configurations by the biaxial strain, which enables us to control its ANE. Our findings provide a potential class of materials to explore the Weyl physics of noncollinear AFMs as well as realizing antiferromagnetic spin caloritronics that exhibits promising prospects for energy conversion and information processing.

关键词： Electronic structure Magnetic phase transitions Magnetotransport Nernst effect Spin caloritronics Thermoelectric generators Antiferromagnets Noncollinear magnets

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