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SSRN 2022年

作者： Wang, C. Lia, Y. Zhuang, Daming Zhao, Ming Tong, H. Wang, H. Wei, J. Gong, Q. School of Materials Science and Engineering Tsinghua University Beijing100084 China Key Lab. for Advanced Materials Processing Technology Ministry of Education State Key Lab. of New Ceramics and Fine Processing College of Mechanical and Vehicle Engineering Taiyuan University of Technology Taiyuan030024 China

Alkali metal Na is beneficial to the performance of CuInGaSSe thin film solar cells. This work studies the addition and optimization of a sputtering SiO 2 barrier layer on the SLG to optimize the Na content that diffuses into the absorber layer from the SLG. The resulting Se content and distribution, the influence and change of the MoSe 2 thickness are studied. Also, the changes in quality of the p-n junction and the defects of the absorption layer are studied. Last, the resulting carrier separation and changes in the carrier recombination rate of each part of the absorber are analyzed. For sub-micron CIGS devices, it is clear that untreated SLG provides excessive amounts of Na. After optimization and analysis of the barrier layer thickness, the average conversion efficiency is increased by 34% compared with the sub-optimal sample, and the efficiency reaches 18.9%. © 2022, The Authors. All rights reserved.

关键词： Efficiency

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Enhanced Ablative Resistance of C/C Composites with Densified Zrb2-Based Ceramics by Incorporation of Mo as Interface Layer

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SSRN 2022年

作者： Zou, Hailiang Zhang, Jinyong Zou, Ji Ping, Hang Wang, Weimin Ren, Lin Fu, Zhengyi Zhang, Fan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei LongZhong Laboratory Xiangyang441100 China

ZrB 2 -ZrC-SiC-Mo-C/C (ZZS-Mo-C/C) composites were synthesised in this study using reaction spark plasma sintering at a low temperature. Furthermore, we investigated the densification process, microstructure, interfacial bonding, ablative properties, and underlying mechanism of the ZZS-Mo-C/C composites. Before and after ablation, the specimen exhibited excellent interfacial bonding, indicating that the presence of the Mo-foil transition layer enables an optimal connection between ZZS and C/C. Additionally, SEM analysis revealed that the ZZS ceramics had a dense structure, thereby preventing oxygen from diffusing further into the matrix. The results indicate that ZZS-Mo-C/C exhibits superior oxidation resistance when exposed to an oxygen-acetylene flame. © 2022, The Authors. All rights reserved.

关键词： Oxidation resistance

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Ultrafast synthesis of Nanoscale Metal Borides for Efficient Hydrogen Evolution

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Angewandte Chemie - International Edition 2025年第14期64卷 e202425257页

作者： Liu, Tingting Chen, Chen Pu, Zonghua Huang, Qiufeng Jiang, Jiadong Han, Min Chen, Wei Yu, Guangtao Sun, Yuzhi Huang, Shengyun Chen, Qingjun Al-Enizi, Abdullah M. Nafady, Ayman Mu, Xueqin Mu, Shichun Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fujian Fuzhou350117 China Fujian Normal University Fujian Fuzhou350117 China Ganjiang Innovation Academy Key Laboratory of Rare Earths Chinese Academy of Sciences Ganzhou341000 China Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Nanoscale metal borides, with exceptional physicochemical properties, have been attracted widespread attention. However, traditional synthesis methods of metal borides often lead to surface coking and large particle sizes. Herein, we have employed a flash Joule heating (FJH) technique to enable the ultrafast synthesis of metal boride nanomaterials. The synthesized materials encompass a wide range of diverse categories, including alkaline-earth metal borides (CaB6), transition metal borides (TiB2, VB2, CrB2, MoB, MoB2, MnB2, MnB4, FeB, CoB, NiB), noble-metal borides (RuB2, RuB1.1), and rare-earth metal borides (lab., CeB6). As an example, the RuB2 demonstrates highly desirable electrocatalytic performance for all-pH hydrogen evolution reaction (HER). Especially, under the acidic condition, it exhibits an overpotential as low as 15 mV at a current density of 10 mA cm−2, with a nearly 100 % faradic efficiency. Additionally, in situ Raman spectra confirm that both Ru and B sites serve as active sites for the HER. Moreover, the stability of RuB2 can be further enhanced by optimizing the microenvironments of the anolyte composition (H+, K+). More importantly, the experimental and density functional theory (DFT) calculations reveal that the co-existence of H+ and K+ localized around the RuB2 plays a crucial role in further enhancing the stability. © 2025 Wiley-VCH GmbH.

关键词： Joule heating

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Controlled Incorporation of Zn into Nitrogen-Doped Porous Carbon Boosts the Alcohol Dehydrogenation to Carboxylic Acids

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SSRN 2024年

作者： Gu, Jun-Fei Chen, Cheng Chaemchuen, Somboon Sang, Wei Li, Xing-Chuan Yuan, Ye Kou, Zongkui Verpoort, Francis State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China 6 Miklukho-Maklaya Str. Moscow117198 Russia

The dehydrogenation of primary alcohols to carboxylic acids is a crucial process in chemical industries such as fibers and plastics. Carboxylic acids, the resulting products, are not only important chemical raw materials but also fundamental pharmaceutical intermediates. Zn-based catalysts have gained attention as a promising option for this transformation owing to their economic cost and abundant reserves. However, stability issues, including structure collapse and morphological changes, have plagued the reported Zn-based catalysts during this transformation. In response to these challenges, this study focused on the design and development of Zn-based catalysts via controlled incorporation of Zn into nitrogen-doped porous carbon to modulate the numbers of defects and Lewis acid-base site pairs. Through extensive screening of various parameters, the best-performing catalyst, namely Zn@NC-800, exhibited high activity and remarkable stability, surpassing all the reported Zn-based catalysts. Moreover, this catalyst demonstrated great recyclab.lity since it could maintain approximately 90% yields after 9 cycles. Notably, the product formation rate of this catalyst could reach 3833 μmol·gcat-1·h-1, exceeding that of most reported non-noble metal heterogeneous catalysts. Consequently, this study offers a promising approach for efficiently and stably catalyzing alcohol dehydrogenation reactions using non-noble metals. © 2024, The Authors. All rights reserved.

关键词： Carboxylic acids

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Impact of crystallinity on orbital torque generation in ferromagnets

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Physical Review B 2024年第14期109卷 144412-144412页

作者： Riko Fukunaga Satoshi Haku Tenghua Gao Hiroki Hayashi Kazuya Ando Department of Applied Physics and Physico-Informatics Keio University Yokohama 223-8522 Japan Keio Institute of Pure and Applied Sciences Keio University Yokohama 223-8522 Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Center for Spintronics Research Network Keio University Yokohama 223-8522 Japan

We investigate the impact of crystallinity on the generation of orbital torques in Ni, which is predicted to exhibit the strongest orbital response among conventional 3d ferromagnetic metals. We show that the current-induced torques in Hf/Ni bilayers are primarily dominated by the orbital torque, arising from the orbital Hall effect in the Hf layer. We find that the orbital torque efficiency is enhanced by a factor of 2 when the stacking order of the Hf/Ni bilayer is altered. Through the examination of bulk and interfacial structural properties of the Ni and Hf layers, and by quantifying the torque efficiency in a symmetric Hf/Ni/Hf trilayer, we show that the orbital torque efficiency is strongly dependent on the crystallinity of the Ni layer. This dependence is in stark contrast to conventional spin-orbit torques, which arise from the spin Hall effect and are typically insensitive to the crystallinity of the ferromagnetic layer. These findings highlight the significant role of the crystalline structure of the ferromagnetic layer in its orbital response and illustrate the potential of crystal structure engineering in optimizing orbital torques.

关键词： Magnetization dynamics Spin current Spin-orbit coupling Spin-orbit torque Spintronics

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Piezoelectric ceramics with high piezoelectricity and broad temperature usage range

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Journal of Materiomics 2021年第4期7卷 683-692页

作者： Qinghu Guo Fei Li Fangquan Xia Pengbin Wang Xiaoyi Gao Hua Hao Hanxing Liu Huajun Sun Shujun Zhang State Key Laboratory Silicate Materials for Architectures Center for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationXi’an Jiaotong UniversityXi’an710049China School of Chemistry and Chemical Engineering University of JinanJinan250022China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNew South Wales2500Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China

There is a general observation that the Curie temperature and piezoelectric property of the ferroelectric ceramics can be enhanced only at the expense of each other,i.e.,higher piezoelectricity,lower Curie temperature,thus,limits their applications over broad temperature *** this research,Sm-modified 0.15 Pb(Mg_(1/3)Nb_(2/3))O_(3)-(0.85-x)PbZrO_(3)-xPbTiO_(3) ceramics have been studied,where excellent piezoelectric coefficients d33¼720 pC/N,d_(33)*=950 pm/V and high Curie temperature T_(C)=293℃ were simultaneously achieved for x=0.42 composition by designing the morphotropic phase boundary(MPB)with local structural *** particular significance is that a high thermal stability was observed with piezoelectric variation below 20%with temperature up to 280℃,demonstrating that the x=0.42 composition is a good candidate for piezoelectric application over broad temperature range where high temperature stability is *** work provides a good paradigm for designing highperformance piezoelectric ceramics with high thermal stability via a combination of MPB and local structural heterogeneity.

关键词： Piezoelectric ceramics Local structural heterogeneity Electromechanical response Thermal stability

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Correction: Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction

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Journal of materials Chemistry A 2022年第18期10卷 10242-10243页

作者： Ding Chen Ruihu Lu Youtao Yao Dulan Wu Hongyu Zhao Ruohan Yu Zonghua Pu Pengyan Wang Jiawei Zhu Jun Yu Pengxia Ji Zongkui Kou Haolin Tang Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory Foshan 528200 China State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 20...

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe₂@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 2022, 10, 7637–7644, https://***/10.1039/d2ta01032a.

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Rationally Designing Anti-Poisoning Polymer Electrolyte by Electronegativity Modulation: Towards Efficient Ammonia-Cracked Hydrogen Fuel Cells

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SSRN 2023年

作者： Shuai, Jiaqi Zhao, Shengqiu Liao, Yucong Wu, Fanglin Wang, Rui Wang, Letian Shen, Chunhui Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Polymer Materials & Engineering School of Material Science & Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan430070 China

Ammonia as a hydrogen enrichment medium has tremendous advantages over pure hydrogen in terms of transportation and utilization. The high-efficiency anti-ammonia-poisoning membrane electrode assembly (MEA) is pivotal for the practical implementation of ammonia-resistant proton exchange membrane fuel cells (PEMFCs). As for the polymer electrolyte, which is an integral part of the proton exchange membrane (PEM) and catalytic layer (CL) binder in the MEA, structural design is an effective way to improve its resistance to ammonia poisoning. Herein, an in-depth study of sulfonimides with superacidic structures reveals that the proton dissociation energies can be altered by tuning the terminal groups with different electronegativity and enhancing the competitive adsorption of protons on Pt. Four perfluorinated backbone sulfonimides (PFSI-x (x= TSM, MSA, ESA, and iPSA)) with distinct charge delocalization were fabricated by grafting different electronegative monomers onto the perfluorosulfonyl fluoride (PFSF). The results show that PFSI-TSM possesses a higher electrostatic potential (2.69 eV) and the lowest activation energy (12.07 KJ/mol). Meanwhile, the performance of the PFSI-TSM PEM fuel cell is 40.6% higher than the PFSA at 80°C, 100% relative humidity (RH) under 100 ppm NH3, with a maximum power density of 635.2 mW/cm2. The underlying reason for enhanced performance is in virtue of the more electronegative end groups render the superacid electrolyte with higher acidity and pKa values, which change the direction of the acid dissociation equilibrium reaction on the Pt surface, enhance the competitive adsorption of protons in the MEA and reduces the probability of ammonia adsorption poisoning. The insights in charge delocalization and proton ionization construct the structure-property relationship which would provide the guidance for a rational design of PEM for ammonia-resistant fuel cells. © 2023, The Authors. All rights reserved.

关键词： Electronegativity

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Minimizing tin(Ⅱ) oxidation using ethylhydrazine oxalate for high-performance all-perovskite tandem solar cells

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Journal of Semiconductors 2025年第5期 91-98页

作者： Jianhua Zhang Xufeng Liao Weisheng Li Yutian Tian Qinyang Huang Yitong Ji Guotang Hu Qingguo Du Wenchao Huang Donghoe Kim Yi-Bing Cheng Jinhui Tong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology School of Art and Design Wuhan University of Technology School of Information Engineering Wuhan University of Technology Department of Materials Science and Engineering Korea University Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

All-perovskite tandem solar cells（ATSCs） have the potential to surpass the Shockley-Queisser efficiency limit of conventional single-junction devices. However, the performance and stability of mixed tin–lead（Sn–Pb） perovskite solar cells（PSCs）, which are crucial components of ATSCs, are much lower than those of lead-based perovskites. The primary challenges include the high crystallization rate of perovskite materials and the susceptibility of Sn2+oxidation, which leads to rough morphology and unfavorable p-type self-doping. To address these issues, we introduced ethylhydrazine oxalate（EDO） at the perovskite interface, which effectively inhibits the oxidation of Sn2+and simultaneously enhances the crystallinity of the perovskite. Consequently, the EDO-modified mixed tin-lead PSCs reached a power conversion efficiency（PCE） of 21.96% with high reproducibility. We further achieved a 27.58% efficient ATSCs by using EDO as interfacial passivator in the Sn-Pb PSCs.

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Eutectic Electrolyte with Unique Solvation Structure for High-Performance Zinc-Ion Batteries (vol 62, 10.1002/anie.202303744, 2023)

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2023年第22期62卷 e202206717-e202206717页

作者： Geng, L. Meng, J. Wang, X. Han, C. Han, K. Xiao, Z. Huang, M. Xu, P. Zhang, L. Zhou, L. Mai, L. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Department of Physical Science & Technology School of Science Wuhan University of Technology Wuhan 430070 P. R. China Hubei Longzhong Laboratory Xiangyang 441000 P. R. Hubei China

Zinc-ion batteries (ZIB) present great potential in energy storage due to low cost and high safety. However, the poor stability, dendrite growth, and narrow electrochemical window limit their practical application. Herein, we develop a new eutectic electrolyte consisting of ethylene glycol (EG) and ZnCl2 for dendrite-free and long-lifespan ZIBs. The EG molecules participate in the Zn2+ solvation via coordination and hydrogen-bond interactions. Optimizing the ZnCl2/EG molar ratio (1 : 4) can strengthen intermolecular interactions to form [ZnCl(EG)]+ and [ZnCl(EG)2]+ cations. The dissociation–reduction of these complex cations enables the formation of a Cl-rich organic–inorganic hybrid solid electrolyte interphase film on a Zn anode, realizing highly reversible Zn plating/stripping with long-term stability of ≈3200 h. Furthermore, the polyaniline||Zn cell manifests decent cycling performance with ≈78 % capacity retention after 10 000 cycles, and the assembled pouch cell demonstrates high safety and stable capacity. This work opens an avenue for developing eutectic electrolytes for high-safety and practical ZIBs.

关键词： Deep Eutectic Solvents Dendrite-Free Zn Anodes Eutectic Electrolytes Solvation Structure Zinc-Ion Batteries

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