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A novel aluminum-carbon nanotubes nanocomposite with doubled strength and preserved electrical conductivity

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Nano Research 2021年第8期14卷 2776-2782页

作者： Shuai Zhang Gaoqiang Chen Timing Qu Jinquan Wei Yufan Yan Qu Liu Mengran Zhou Gong Zhang Zhaoxia Zhou Huan Gao Dawei Yao Yuanwang Zhang Qingyu Shi Hua Zhang State Key Laboratory of Tribology Key Laboratory for Advanced Materials Processing Technology Ministry of Education of ChinaDepartment of Mechanical Engineering Tsinghua UniversityBeijing 100084China Key Lab for Advanced Materials Processing Technology of Education Ministry School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Loughborough materials characterization center Department of materialsLoughborough UniversityLoughboroughLEU 3TUUK State Key Laboratory of Special Cable Technology Shanghai Electric Cable Research Institute Co.Ltd.Shanghai 200093China School of Mechanical Engineering Beijing Institute of Petrochemical Technology Beijing 102617China

Enhancing the mechanical strength of highly conductive pure metals usually causes significant reduction in their electrical *** example,introducing phase/matrix interfaces or more grain boundaries,are common and effective methods to strengthen *** it simultaneously increases the electron scattering at the interface,thus reducing the electrical *** this study,we demonstrate that pure aluminum(Al)/carbon nanotubes(CNTs)nanocomposites prepared by friction stir processing have successfully broken through these *** yield strength and tensile strength of Al/CNTs nanocomposites have improved by 104.7%and 51.8%compared to pure Al,while the electrical conductivity remained comparable to that of pure *** explore the potential mechanisms,the interface between CNTs and Al was examined and characterized by transmission electron microscopy(TEM)and Raman *** interfacial reaction compounds were present and no visible physical gaps were observed at CNTs and Al *** defined it as a clean and tightly bonded *** the quantity of phase interface has increased,the electrical conductivity of the nanocomposite remains approximately *** attribute the preserved electrical conductivity to the clean and tightly bonded CNTs/Al interface in the nanocomposite.

关键词： carbon nanotubes/aluminum nanocomposites mechanical properties electrical conductivity friction stir processing interface

Bag-pressed plasticine carbon electrodes for perovskite solar cells and modules

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Solar Energy materials and Solar Cells 2025年 290卷

作者： Liao, Teng Zhu, Aodong Jiang, Yuanzhu Zhao, Wang Cheng, Mengmeng Xiao, Junyan Cheng, Yi-Bing School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China Research Centre for Advanced Thin Film Photovoltaics Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China

Carbon-based top electrodes have significant value in enhancing the stability and reducing the cost of perovskite solar cells (PSCs). However, the fabrication process for carbon-based top electrodes in large-area, high-performance perovskite solar modules (PSMs) still lacks practical techniques. In this work, we reference the bag moulding process and use a plasticine-like uncured carbon paste to prepare the top electrode for small-area PSCs and PSMs. Benefiting from the uniform pressure provided by the bag pressing process, this carbon electrode can make sufficiently good electrical contact with the hole transport layer in the large-area device in a single pass. After further removing excess fluid, the device can achieve efficiencies of 18.57 % (∼0.15 cm2) and 14.44 % (∼10 cm2) with good stability. This convenient top electrode preparation method at room temperature offers a novel technological solution for the commercial application of large-area PSMs. © 2025 Elsevier B.V.

关键词： Carbon electrodes

Design and Characterization of 3d Printed Gradient Scaffolds with Spatial Distribution of Pore Sizes

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SSRN 2024年

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore size, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore size distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2024, The Authors. All rights reserved.

关键词： 3D printing

TiNB 0.8O 4 Microspheres with Pseudocapacitive Properties for Fast-Charging and Durable Sodium Storage

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SSRN 2024年

作者： Li, Xinyuan Zhang, Tianyi Chen, Zhuo Fan, Hao Hu, Ping Cai, Congcong Zhou, Liang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China

Titanium niobium oxides (TNO) are promising anode materials for sodium-ion batteries (SIBs) due to their efficient ion diffusion channels. However, their poor electronic conductivity and severe volume expansion during Na+ (de-)intercalation impede the longevity of SIBs. To address these issues, the core@shell TiNb0.8O4/C@C microspheres (TNO/C@C) have been developed to enhance electron conduction and Na+ diffusion. The TNO/C@C, featuring a dual conductive configuration, outperforms pure TNO and other variations like TNO/C and TNO@C that rely solely on either bulk or surface electronic conductors. Thus, the TNO/C@C anode material achieves a fast-charging rate of 200 C, allowing full charging in 2 seconds, and demonstrates long-term stability over 5000 cycles. In-situ Raman analysis reveals a zero-strain feature during sodiation/desodiation, which minimizes structural degradation over repeated cycles. In-situ EIS test indicates low electron resistance, enhancing both the rate capability and stability. Therefore, the bulk and surface dual conducting strategy offers new insights into robust and fast-charging SIBs. © 2024, The Authors. All rights reserved.

关键词： Sodium-ion batteries

Construction of an Anti-Anionic-Depletion Layer to Mitigate the Tip Deposition Effect for Dendrite-Free Zinc Anode

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SSRN 2024年

作者： Li, Xiaohui Qiu, Dan Zhou, Qiancheng Yang, Ze Zhou, Xing Wang, Wenping Wei, Chenchen Zou, Ting Yu, Ying Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan430079 China State Key Laboratory of Advanced Technology for Materials Synthesis and processing Wuhan University of Technology Wuhan430070 China

Rechargeable aqueous zinc-ion batteries have been plagued by the well-known problem of zinc dendrite formation. This issue mainly arises from the inherent depletion of anions in the vicinity of the zinc anode during deposition process, leading to a strong spatial electric field that influences Zn2+ cations deposition and triggers dendrite growth. Herein, the anti-anionic-depletion strategy is proposed that involves anions anchored in the surface region of zinc anode to mitigate the adverse effects of the spatial electric field and inhibit dendrite growth. By theoretical calculations and experimental verification, layered double hydroxides (LDHs) materials were selected to immobilize SO42- anions and construct a protective coating layer against anion depletion (anti-anionic-depletion layer). Furthermore, the deposition flux of Zn2+ cations was also regulated by in-situ growing LDH nanosheets. Benefiting from these modifications, the in-situ grown ZnAl-LDH modified electrode (Zn@ZnAl) exhibits outstanding stability (5500 cycles at 40 mA cm-2), and shows negligible capacity degradation in both Zn-Mn full cells and zinc hybrid capacitors. © 2024, The Authors. All rights reserved.

关键词： Positive ions

Magnetic Ordering Boost Excellent Thermoelectric Performance of Flexible Films

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SSRN 2023年

作者： Ke, Shaoqiu Nie, Xiaolei Ai, Xiaoling Li, Xiangyu Xu, Wenjie Fu, Kai Chen, Tiantian Liu, Chengshan Zhu, Wanting Wei, Ping Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China

The poor electrical transport performance of flexible thermoelectric (TE) films is a major bottleneck for the development of in-plane heat dissipation technology based on Peltier effect. Herein, ordered Fe nanoparticles (Fe-NPs) and in-situ Fe3O4 nanoparticles (Fe3O4-NPs) as magnetic functional elements (MFEs) were embedded into Bi0.5Sb1.5Te3 (BST)/epoxy flexible films in order to enhance the TE performance. The remarkable increases in electrical conductivity of BST/MFEs/BST/epoxy flexible films have been confirmed to originate from the carrier mobility increases. The retention of large Seebeck coefficient is attributed to the negative magnetoresistance (MR-) induced by spin-dependent scattering and weak localization effect from MFEs. As a result, the maximum power factor of BST/MFEs/BST/epoxy flexible films increased by 45%, and the maximum cooling temperature difference enhanced by 1.6 times. This work reveals that the ordered MFEs can significantly boost the electro-thermal conversion performance of flexible TE films and the magnetoresistance theory can reveal the scattering mechanism of charge carriers in thermo-electromagnetic flexible films. © 2023, The Authors. All rights reserved.

关键词： Magnetoresistance

Guest ions pre-intercalation strategy of manganese-oxides for supercapacitor and battery applications

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Journal of Energy Chemistry 2021年第9期30卷 480-493页

作者： Lina Chen Chongyang Hao Yamin Zhang Youri Wei Linna Dai Jun Cheng Hongqiang Zhang Lijie Ci State Key Lab of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina

Optimization of intrinsic structure of electrode materials plays decisive roles in promoting the development of energy storage systems to meet the fast-growing requirements in the *** engineering has been proved to be an effective way to obtain adequate active sites,preferable ion diffusion channels and stable structure,thus enhance the performance of *** in-depth understanding of the correlation among synthesis,structure and performance will significantly promote the development of excellent materials and energy storage ***,in this review,recent advances in regards to cation preintercalation engineering in Mn-based electrode materials for rechargeable metal ion batteries are systematically *** guest cations can expand interlayer space to promote ion diffusion kinetics,serve as pillars to stabilize structure,control composition and valence to switch electrochemical behavior,thus improve the overall performance of secondary ***,the existing challenges and perspectives are provided for the interlayer engineering and its promotion to battery industry.

关键词： Interlayer engineering Electrode materials Energy storage devices

Ammonium Ion and Structural Water Co-Assisted Zn^(2+) Intercalation/De-Intercalation in NH_(4)V_(4)O_(10)∙0.28H_(2)O

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Chinese Journal of Chemistry 2021年第7期39卷 1885-1890页

作者： Ting Zhu Bo Mai Ping Hu Ziang Liu Congcong Cai Xuanpeng Wang Liang Zhou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei430070 China Department of Physical Science&Technology School of ScienceWuhan University of TechnologyWuhanHubei430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshanGuangdong528200 China

Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc-ion batteries(ZIBs).Herein,we report an ammonium vanadate(NH_(4)V_(4)O_(10)∙0.28H_(2)O,NHVO)aqueous ZIB cat... 详细信息

关键词： Aqueous zinc-ion battery Cathode material Vanadates Zincates Electrochemistry

Articular cartilage and osteochondral tissue engineering techniques:Recent advances and challenges

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Bioactive materials 2021年第12期6卷 4830-4855页

作者： Wenying Wei Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China

In spite of the considerable achievements in the field of regenerative medicine in the past several decades,osteochondral defect regeneration remains a challenging issue among diseases in the musculoskeletal system because of the spatial complexity of osteochondral units in composition,structure and *** order to repair the hierarchical tissue involving different layers of articular cartilage,cartilage-bone interface and subchondral bone,traditional clinical treatments including palliative and reparative methods have showed certain improvement in pain relief and defect *** is the development of tissue engineering that has provided more promising results in regenerating neo-tissues with comparable compositional,structural and functional characteristics to the native osteochondral *** in this review,some basic knowledge of the osteochondral units including the anatomical structure and composition,the defect classification and clinical treatments will be first *** we will highlight the recent progress in osteochondral tissue engineering from perspectives of scaffold design,cell encapsulation and signaling factor incorporation including bioreactor *** products for osteochondral defect repair will be analyzed and summarized ***,we will discuss the current obstacles and future directions to regenerate the damaged osteochondral tissues.

关键词： Osteochondral tissue engineering Cartilage tissue engineering Gradient scaffold Bioreactors