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A novel bifunctional oxygen electrode architecture enabled by heterostructures self-scaffolding for lithium–oxygen batteries

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Journal of Energy Chemistry 2020年第12期29卷 216-221页

作者： Liang Xiao Zhong Qin Jingyu Yi Haoyang Dong Jinping Liu School of Chemistry Chemical Engineering and Life ScienceWuhan University of Technology.Wuhan 430070HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina State Center for International Cooperation on Designer Low-Carbon&Environmental Materials and School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

In recent years, as one of the most promising chemical power sources for future society, lithium–oxygen (Li–O2) battery receives great attention due to its extremely high theoretical energy density of 3505 Wh kg^(–1)[1–4]. In practice, large polarization and consequent low energy efficiency currently still hinder the application of Li–O2batteries, which mainly results from the sluggish electrochemical reaction kinetics of oxygen diffusion electrodes in aprotic electrolytes [5]. On one hand, oxygen reduction reaction (ORR)in aprotic electrolytes is intrinsically sluggish due to the difficult charge transfer, the low solubility of oxygen.

关键词： Heterostructure Nanoarray architecture Bifunctional catalysis Oxygen diffusion electrode Lithium–oxygen batteries

Differentiation of Chemisorption and Physisorption of Carbon Dioxide on Imidazolium-type Poly(ionic liquid)Brushes

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Journal of Wuhan University of technology(materials Science) 2020年第4期35卷 750-757页

作者： ZHANG Dongyu QU Rong ZHANG Haining ZHANG Fangfang Technology Center China Tobacco Henan Industrial Co.Ltd.Zhengzhou 450000China Non-power Nuclear Technology Collaborative Innovation Center Hubei University of Science and TechnologyXianning 437100China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Amine-functionalized imidazolium-based poly(ionic liquid)brushes on mesoporous silica were synthesized via"grafting through"technique and were applied as model sorbents to understand physisorption and chemisorption of carbon dioxide *** experimental results reveal that the total adsorption capacity of model sorbents derived from temperature programmed desorption(TPD)approach reaches 1.72 mmol·g^-1 that is much higher than the sum of adsorption capacity of bare mesoporous silica and free polymers at 25℃under carbon dioxide partial pressure of 0.2 *** proposed physical adsorption and chemical adsorption of carbon dioxide molecules in TPD response curves were validated by volumetric desorption *** is also observed that physical adsorption is completely reversible and chemical adsorption is *** results demonstrate that the temperature programmed desorption technique is an effective approach to differentiate chemisorption and physisorption of gaseous species on solid sorbents,which is beneficial for understanding of adsorption mechanism and materials design.

关键词： adsorption surface-attachment poly(ionic liquid) grafting through carbon dioxide

Pvdf/Carbon Directional Microchannels-Enhanced Ion Diode-Like Hydrogel-Based Pressure Sensors

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SSRN 2025年

作者： Wen, Xuezhong Zhang, Hongjian Eom, Taeuk Jeong, Chang Kyu Zhang, Yong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Center for Smart Materials and Device Integration Wuhan University of Technology Wuhan430070 China Department of JBNU-KIST Industry-Academia Convergence Research Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of Division of Advanced Materials Engineering Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of Department of Energy Storage/Conversion Engineering of Graduate School Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of

Hydrogels are promising candidates for flexible electronics but are often constrained by narrow pressure-sensing ranges and unstable ion migration. To overcome these limitations, we developed an ionic hydrogel sensor incorporating diode-inspired bipolar architectures (PSSNa/PDACl) and poly(vinylidene fluoride)/carbon directional microchannels (PCDMC). The optimized 5-PCNPC hydrogel exhibits a broad pressure-sensing range (2.3–100 kPa) with a sensitivity of 0.360 mV·kPa−1 (a 35.6% enhancement) and a rectification ratio of 12.9, enabled by PCDMC-guided anisotropic ion transport and rapid stress dissipation (337 ms recovery). With excellent durability over 500 cycles and a power density of 1.17 mW·m−2, the hydrogel sensor demonstrates its potential in practical applications, including a 5×5 touchpad for spatial pressure mapping and real-time monitoring of respiration, swallowing, and locomotion. This study underscores the potential of hydrogel-based sensors with wide-range operability for next-generation wearables and interactive systems. © 2025, The Authors. All rights reserved.

关键词： Flexible electronics

Directional transport for efficient catalysis

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Matter 2023年第3期6卷 674-676页

作者： Jie Ying Mark D. Symes Xiao-Yu Yang School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai 519082 China WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology Wuhan 430070 China School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA

Directional transport is a common phenomenon in nature that underpins the efficient completion of a number of complex and elaborate processes. However, its application to the design of catalysts is challenging as a result of a lack of understanding of the basic design principles in operation. To this end, it has now been demonstrated that a porous covalent organic framework material with a mesoporous aperture substantially promotes the transport ability of oxygen and consequently increases the catalytic activity of commercial Pt/C catalysts in a fuel cell.

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The Effects of Diatom Frustules Shapes and Purity on the Performance of Diatom-Based Lithium Ion Silicon Carbon Anode materials

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SSRN 2022年

作者： Liu, Yuhang Ren, Zijie Zhou, Liang Jiang, Yuqian Gao, Huimin An, Qinyou Xu, Longhua School of Resources and Environmental Engineering Wuhan University of Technology Hubei Wuhan430070 China Key Laboratory of Hubei Province for Mineral Resources Processing Environment Wuhan430070 China State Key Laboratory of Environment-friendly Energy Materials Sichuan Mianyang621010 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Southwest University of Science and Technology China

Diatomite has been widely studied as a silicon source. Three kinds of diatomite with different diatom frustules or different purities were reduced to porous silicon. The porous silicon coated carbon was prepared into positive electrode materials for battery cycle performance test. The test results showed that the Si/C composites anode material obtained by the reduction of diatomite with high purity of SiO2 has a high initial capacity, 2491mAhg-1, while that with low SiO2 purity is only 1412mAhg-1. The capacity retention rate of Si/C material prepared by columnar diatomite structure is higher than that of discoid diatomite. The battery made of high purity diatomite with discoid diatom has serious attenuation after 40 cycles. It could only retain 1/10 of the initial capacity, while the attenuation of the battery prepared by cylindrical diatomite is much better. The reason was that the specific surface area of macro porous silicon was much smaller than that of mesoporous silicon and less lithium ions were consumed in the irreversible process of forming solid electrolyte membrane for the first time. It could also be known that an appropriate amount of impurities in porous silicon can effectively reduce the volume expansion of silicon during the battery charge and discharge. The main reason was that the impurities occupied the internal space to alleviate the volume expansion of silicon or the excess carbon was coated on the impurities. © 2022, The Authors. All rights reserved.

关键词： Lithium-ion batteries

Facile one-step vulcanization of copper foil towards stable Li metal anode

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Science China materials 2020年第9期63卷 1663-1671页

作者： Danqi He Yaqi Liao Zexiao Cheng Xiahan Sang Lixia Yuan Zhen Li Yunhui Huang State Key Laboratory of Material Processing and Die and Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Lithium metal has been regarded as the ultimate anode for next-generation rechargeable batteries with high energy ***,its high reactivity and dendrite growth seriously limit its commercial application,which can be well addressed by realizing uniform Li ***,we report a facile and scalable one-step vulcanization method to modify commercial Cu foil with lithophilic *** in situ formed Cu2S layer can not only promote the homogeneous deposition of Li via its lithophilic nature,but also benefit the formation of a stable solid-electrolyte interphase during initial *** Cu2S-modified Cu current collector realizes dendrite-free Li plating/stripping and thus exhibits stable cycling performance with a high Coulombic efficiency,even with a large capacity of 4 mA h cm^-2.A full-cell consisting of a Cu2S/Cu-Li anode and a LiFePO4 cathode exhibits greatly improved cycling stability and enhanced Coulombic efficiency,demonstrating the effectiveness and practicability of the proposed Cu2S/Cu foil in the field of rechargeable Li metal batteries.

关键词： lithium metal anode current collector lithophilic layer copper sulfide electrochemical performance

Highly Deformable Ag2te1-Xsex-Based Thermoelectric Compounds

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SSRN 2023年

作者： Feng, Liping Guo, Anan Liu, Keke Bai, Hui Zhang, Qingjie Wu, Jinsong Su, Xianli Tang, Xinfeng Uher, Ctirad Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China 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 Department of Physics University of Michigan Ann ArborMI48109 United States

Thermoelectric semiconductors are crucial for many critical applications, but are also universally fragile, which greatly limits the development of room temperature flexible thermoelectric devices. Herein, an extraordinary deformability at room temperature and high thermoelectric performance are simultaneously realized in wide composition of Ag2Te1-xSex (x = 0-0.2) compounds with monoclinic structure. An average compressive strain rate of 24% at room temperature is attained for the pristine Ag2Te compound. Moreover, a tensile strain rate of 43% is measured at room temperature using the in-situ transmission electron microscopy. First Principles calculations and in-situ transmission electron microscope tensile test results indicate that the Ag2Te compound is inclined to slip along the (-102) [010] plane under external forces due to a larger ratio between the cleavage energy (Ec) and the slip energy barrier. The slipping process generates high concentrations of dislocations, deformations, and amorphous structures, which together dissipate the externally applied load energy, yielding superior deformability. Meanwhile, the maximum dimensionless figure of merit ZT of 0.61 is obtained at 380 K. This study demonstrates that Ag2Te-based compounds are promising for the fabrication of flexible thermoelectric devices in applications, such as wearable, room temperature electronic gadgets. © 2023, The Authors. All rights reserved.

关键词： High resolution transmission electron microscopy

Bifunctional Electrocatalyst Junction Engineering: Cop Nanoparticles In-Situ Anchored on Co3(Si2o5)2(Oh)2 Nanosheets for Highly Efficient Water Splitting

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SSRN 2022年

作者： Mu, Yang Dong, Xueying Jing, Xuyang Pei, Xiaoyu Zhao, Yunfeng Kou, Zongkui Meng, Changgong Zhang, Yifu State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian116024 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China College of Environmental and Chemical Engineering Dalian University Dalian116622 China

The development of promising bifunctional water splitting electrocatalysts through precise design of composition and structure is a challenging topic. In this work, a novel junction is developed consisting of pure-phase CoP nanoparticles in-situ grown on Co3(Si2O5)2(OH)4 nanosheets, denoted as CoP/CSNSs. Rely on the small adding Co2+ in complex precursor, controllable synthesis of pure-phase CoP without impure phases is achieved, and the perfect nanosheet structure from support can be inherited, the CoP/CSNSs therefore shows the highest electrocatalytic performance for both HER and OER in 1.0 M KOH. Besides, the overall water splitting voltage of CoP/CSNSs(+/-) delivers 1.50 V at 10 mA cm-2, which outperforms that of the commercial Pt/C||RuO2 system. The preferable bifunctional electrocatalytic performance benefits from the optimized electron state of the adjacent dual-active centers, such that surficial CoP contributes to the dissociation of H-OH bonds boosting the Volmer step of HER, and Co3(Si2O5)2(OH)4 support contributes to OH- adsorption facilitating the kinetics of OER. Meanwhile, the advanced nanosheet structure provides more accessible active centers and more efficient charge/mass transport highway. In this work, bifunctional metal silicate electrocatalyst for water dissociation is designed and fabricated for the first time. The simple and effective phase-modulation and structure-control is a promising strategy for continually exploitation of multifunctional metal silicate electrocatalysts. Such low-cost and highly efficient electrocatalysts may create new opportunities for future development of renewable energy conversion technologies. © 2022, The Authors. All rights reserved.

关键词： Nanoparticles

Nanomultilayer Gradation Strategy to Improve Mechanical Properties of Tisin/Alcrn Hard Coatings

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SSRN 2024年

作者： Li, Qizhong Liu, Fazhen Yang, Mai Gao, Tenghua Ji, Baifeng Zhang, Song Tu, Rong Zhang, Lianmeng Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Xiangxing Road 6 Guangdong Zhongshan528400 China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology 122 Luoshi Road Wuhan430070 China School of Civil Engineering and Architecture Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

The structures design and optimization of multilayer coatings, which are utilized to surmount the trade-off between hardness and toughness, has been a current hot topic in the field of hard ceramic coatings. Herein, multi-layered TiSiN/AlCrN coatings with a constant and gradient sublayer thickness (Λ, modulation periods) ranging from 20 to 3.8 nm were prepared by the Cathodic Arc Ion plating. The microstructure, mechanical properties, residual stress and fracture toughness of four gradient structures were investigated systematically. All coatings exhibit a typical FCC crystal structure. In the coating with a monotonous decrease of modulation period (G2 gradient structure), the interface between the TiSiN layer and the AlCrN layer transformed from a partially semi-coherent interface at the bottom layers of Λ = 20 nm, to a fully coherent interface at the top layers of Λ = 3.8 nm, showing the higher mechanical properties than those of G2 (reverse structure of G1). The coating with dual-gradient V2 structure (G1+G2) demonstrated the highest hardness (37.6 ± 1.0 GPa), H/E and H3/E2 ratios (0.095 and 0.34 GPa), and bonding strength (75.3 N), as well as lowest friction coefficient (0.34) and wear rate (6.7×10-6 mm3/Nm). The remarkable resistance to damage and toughness displayed by the V2 structure could be ascribed to its intrinsic capacity for effectively alleviating stress concentration and accommodating incompatibilities during the plastic deformation process. This work offers insights into employing gradient architecture design to enhance the strength and toughness of coatings. © 2024, The Authors. All rights reserved.

关键词： Silicon compounds