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SSRN 2023年

作者： Liu, Zhe Mo, Xichao Tian, Shuhao Chen, Jie Liu, Yanpeng Wu, Haiyang Zhao, Yawei Wang, Yanrong Peng, Shanglong National & Locai Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University Lanzhou730000 China School of Physical Science and Technology Lanzhou University Lanzhou730000 China

As one of the two-dimensional (2D) nanomaterials, MXene exhibits great potential on gas-sensing owing to its high specific area, rich functional groups and great charge transfer mobility. Herein, electrostatic adsorption and calcination strategies were taken for ZIF-derived Co3O4 and alkalized Ti3C2Tx MXene to fabricate Co3O4/MX7.5 heterojunction. It can be found that Co3O4 nanoparticles (NPs) uniformly grow on the surface of alkalized Ti3C2Tx. Alkalized Ti3C2Tx with lower work function (lower than 3.9 eV) can transfer more electrons towards Co3O4 and promote the redox of Co2+. These increased Co2+ ions can help to adsorb more adsorbed oxygen and produce more oxygen defects, which enhances contact interaction between ethanol molecules and adsorption sites. The formation of heterojunction between Co3O4 and MXene is observed by UV-vis spectra, and this interface effect enhances the ability of gas sensors. Therefore, the sensors based on the obtained Co3O4/MX7.5 heterojunction can operate at a relatively low temperature (140°C) with a response of 3500% and a low detection limit of 1 ppm. And it also delivers long-term stability (about 30 days). This work demonstrates practical application for detecting ethanol at a relatively low working temperature and keeping their response in a long term. © 2023, The Authors. All rights reserved.

关键词： Ethanol

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Organic-Inorganic Composite Electrolyte with In-Suit Polymerization Poly(1,3-Dioxolane) Toward High-Performance Quasi-Solid-State Lithium Metal Batteries

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SSRN 2024年

作者： Yi, Lingguang Chen, Xiaoyi Huang, Jiajia Liu, Jiali Hu, Honghui Zhao, Huahui Wu, Tianjing Liu, Li Wang, Xianyou National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery National Base for International Science & Technology Cooperation Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion School of Chemistry Xiangtan University Hunan Xiangtan411105 China

The sodium superionic conductor structure (NASICON) Li1.3Al0.3Ti1.7(PO4)3 (LATP) is a promising active filler in composite polymer electrolytes (CPEs) because of its high ionic conductivity, air stability, and sufficient stiffness, their practical applications have still been hampered by its chemical instability with lithium metal anode. To resolve the above limitation, herein, a novel poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)-based CPEs comprising the conductive poly(poly(ethylene glycol) methyl ether methacrylate-co-(lithium 2-acrylamido-2-methylpropanesulfonic acid)) (P(PEGMEMA-co-AMPSLi)), inorganic filler LATP and in-situ polymerized 1,3-dioxolane (DOL) artificial interlayer have been synthesized and defined as PPALx-DL. Despite the reduction of both the thickness of the electrolyte membranes and liquid contents, the as-prepared PPAL5-DL CPE provides a faster organic-inorganic Li+ transport channel and exhibits enhanced electrochemical compatibility with Li metal anodes. Moreover, the PPAL5-DL CPE shows a high room-temperature (RT) ionic conductivity of 3.47× 10−4 S cm−1 and a high Li+ transference number of 0.61. The assembled LFP|PPAL5-DL|Li battery has significantly improved cycling stability and discharge capacities of 131.5 mAh g−1 at 1C for 400 cycles at RT, respectively. Thereby, this study proposes a feasibility preparation methodology of the LATP-containing CPEs for practical applications toward next-generation quasi-solid-state Li metal batteries (LMBs). © 2024, The Authors. All rights reserved.

关键词： Ionic conductivity

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Synergistic Catalytic Effect of Multiple Active Sites in High-Entropy MAX materials for Lithium Polysulfide Enables High-Performance Lithium–Sulfur Batteries

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ACS Applied Energy materials 2025年第11期8卷 7538-7550页

作者： Yongjie Ye Sisi Liu Yixin Luo Yongqian He Wanqi Zhang Mengqing Wang Ying Chen Xuewen Peng Caixiang Wang Qin Tang Yan Luo Bing Wu Hongbo Shu Ruizhi Yu Manfang Chen National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion School of Chemistry Xiangtan University Xiangtan 411105 China Department of Inorganic Chemistry University of Chemistry and Technology Prague Technická 5 Prague 6 166 28 Czech Republic Institute of Micro/Nano Materials and Devices Ningbo University of Technology Ningbo Zhejiang 315211 China

The commercialization of lithium–sulfur batteries (LSBs) is limited by slow kinetics and the detrimental shuttle effect of lithium polysulfides (LiPSs), which impede their practical application. This study addresses these issues by exploring the use of high-entropy MAX phases (NbVMoTiAlC3and CrVMoTiAlC3) as cathode additives. Through high-temperature ball milling, two types of MAX phases are synthesized, and their roles in enhancing the electrochemical performance of LSBs are systematically evaluated. The study finds that Nb-based MAX phases exhibit stronger interactions between transition metals, which significantly improve the electrical conductivity and chemical stability compared to Cr-based MAX phases. These unique properties enable NbVMoTiAlC3to enhance Li+migration kinetics and improve sulfur species utilization efficiency. In situ ultraviolet–visible spectroscopy further shows that NbVMoTiAlC3promotes the catalytic conversion of LiPSs, increasing the number of S3•–radicals. As a result, the cell with NbVMoTiAlC3@CNT/S exhibits a high capacity retention of 85.29% after 100 cycles under a sulfur loading of 3.85 mg cm–2and a low capacity decay rate of 0.088% after 500 cycles at 3 C. This work demonstrates the potential of MAX-phase materials to overcome key challenges in LSBs, offering insights for the development of high-performance energy storage systems.

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Broadband photomultiplication-type polymer photodetectors and its application in light-controlled circuit

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Science China Chemistry 2022年第8期65卷 1642-1649页

作者： Ming Liu Qunping Fan Kaixuan Yang Zijin Zhao Xingchao Zhao Zhengji Zhou Jian Zhang Francis Lin Alex K.-Y.Jen Fujun Zhang Key Laboratory of Luminescence and Optical Information Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China Department of Chemistry City University of Hong KongHong Kong 999077China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Key Lab for Special Functional Materials Ministry of EducationNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand School of MaterialsHenan UniversityKaifeng 475004China Guangxi Key Laboratory of Information Materials School of Material Science and TechnologyGuilin University of Electronic TechnologyGuilin 541004China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering University of WashingtonWashington 98195-2120United States Hong Kong Institute for Clean Energy City University of Hong KongHong Kong 999077China

Photomultiplication-type polymer photodetectors(PM-PPDs)were achieved with polymer P3HT as donor and PY3Se-1V as acceptor based on structure of ITO/PEDOT:PSS/active layer/*** optimal weight ratio of P3HT to PY3Se-1V is about 100:*** of isolated electron traps are formed with PY3Se-1V surrounded by P3HT due to rather less content of PY3Se-1V in active layers and about 0.94 e V energy offset between the lowest unoccupied molecular orbitals(LUMO)of P3HT and *** optimal PM-PPDs exhibit broad spectral response from 350 to 950 nm and external quantum efficiency(EQE)values of68,200%at 360 nm,26,400%at 630 nm and 19,500%at 850 nm under-15 V *** working mechanism of PM-PPDs is attributed to the interfacial trap-assisted hole tunneling injection from external *** performance of PM-PPDs can be further improved by incorporating appropriate PMBBDT with high hole mobility as the third *** EQE values of optimal ternary PM-PPDs are increased to 105,000%at 360 nm,40,000%at 630 nm and 31,800%at 850 nm under-15 V bias,benefiting from the enhanced hole transport in ternary active *** optimal ternary PM-PPDs were successfully applied in a light-controlled circuit to turn on or turn off light emitting diode(LED).

关键词： polymer photodetectors photomultiplication external quantum efficiency broadband

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Wire-in-Wire TiO_(2)/C Nanofibers Free-Standing Anodes for Li-Ion and K-Ion Batteries with Long Cycling Stability and High Capacity

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Nano-Micro Letters 2021年第7期13卷 91-104页

作者： Die Su Yi Pei Li Liu Zhixiao Liu Junfang Liu Min Yang Jiaxing Wen Jing Dai Huiqiu Deng Guozhong Cao National Base for International Science and Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105People’s Republic of China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195-2120USA College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China School of Physics and Electronics Hunan UniversityChangsha 410082People’s Republic of China

Wearable and portable mobile phones play a critical role in the market, and one of the key technologies is the flexible electrode with high specific capacity and excellent mechanical flexibility. Herein, a wire-in-wire TiO_(2)/C nanofibers (TiO_(2) ww/CN) film is synthesized via electrospinning with selenium as a structural inducer. The interconnected carbon network and unique wire- in-wire nanostructure cannot only improve electronic conductivity and induce effective charge transports, but also bring a superior mechanic flexibility. Ulti-mately, TiO_(2) ww/CN film shows outstanding electrochemical performance as free-standing electrodes in Li/K ion batteries. It shows a discharge capacity as high as 303 mAh g^(−1) at 5 A g^(−1) after 6000 cycles in Li half-cells, and the unique structure is well-reserved after long-term cycling. Moreover, even TiO_(2) has a large diffusion barrier of K^(+), TiO_(2) ww/CN film demonstrates excellent perfor-mance (259 mAh g^(−1) at 0.05 A g^(−1) after 1000 cycles) in K half-cells owing to extraordinary pseudocapacitive contribution. The Li/K full cells consisted of TiO_(2) ww/CN film anode and LiFePO_(4)/Perylene-3,4,9,10-tetracarboxylic dianhydride cathode possess outstanding cycling stability and demonstrate practical application from lighting at least 19 LEDs. It is, therefore, expected that this material will find broad applications in portable and wearable Li/K-ion batteries.

关键词： Free-standing TiO_(2)/C nanofiber Li-ion battery K-ion battery First-principles calculation Full cells

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Adjusting the SnZn defects in Cu_(2)ZnSn(S,Se)_(4) absorber layer via Ge^(4+) implanting for efficient kesterite solar cells

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Journal of Energy Chemistry 2021年第10期30卷 1-7,I0001页

作者： Yueqing Deng Zhengji Zhou Xin Zhang Lei Cao Wenhui Zhou Dongxing Kou Yafang Qi Shengjie Yuan Zhi Zheng Sixin Wu Key Lab for Special Functional Materials Ministry of EducationNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyAnd School of MaterialsHenan UniversityKaifeng 475004HenanChina Collaborative Innovation Centre of Nano Functional Materials and Applications HenanChina Key Laboratory for Micro-Nano Energy Storage and Conversion Materials of Henan Province College of Advanced Materials and EnergyInstitute of Surface Micro and Nano MaterialsXuchang UniversityXuchang 461000HenanChina

The development of kesterite photovoltaic solar cells has been hindered by large open-circuit voltage(V_(oc))***,Snzn deep point defect and associative defect cluster have been recognized as the main culprit for the Voc ***,manipulating the deep-level donor of Snzn antisite defects is crucial for breaking through the bottleneck of present Cu_(2) ZnSn(S,Se)_(4)(CZTSSe)photovoltaic *** this study,the Snzn deep traps in CZTSSe absorber layer are suppressed by incorporation of *** energy levels and concentration of Snzn defects measured by deep-level transient spectroscopy(DLTS)decrease *** addition,the grain growth of CZTSSe films is also promoted due to Ge implantation,yielding the high quality absorber ***,the efficiency of CZTSSe solar cells increases from 9.15%to 11.48%,largely attributed to the 41 mV Voc increment.

关键词： CZTSSe Defect Absorber layer Solar cells V_(oc)

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Enhancing Electrochemical Performance of High-Entropy Co/Ni-Free P2/O3 Hybrid-Phase Layered Metal Oxide Cathode for Sodium-Ion Batteries

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SSRN 2024年

作者： Zhang, Yixu Wang, Ruijuan Song, Wenhao Lei, Ming Zhang, Yuxin Lei, ZeYu Wei, Qiliang Zhang, Xiaoyan Wang, Xianyou National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion School of Chemistry Xiangtan University Xiangtan411105 China Institute of Micro/Nano Materials and Devices Ningbo University of Technology Zhejiang Ningbo315211 China

Sodium-ion batteries (SIBs) have seen a gradual increase in research and application fervor in recent years, and Co/Ni-free Fe-Mn-based materials are considered to have great potential for development due to excellent electrochemical performance and high crustal abundance. However, the Co/Ni-free Fe-Mn-based materials tends to undergo a large phase transition in the sodium (de)intercalation layer, which will result in the material structure damage. Using NaTi2(PO4)3 (NTP) as the cladding layer, high entropy P2/O3-Na0.75Cu0.1Fe0.2Mg0.2Mn0.4Ti0.1O2 (NCFMMT@NTP) materials were successfully prepared in this work. It can be distinctly seen that the cyclic stability of NCFMMT@NTP has been significantly improved (the first cycle at 0.2C reaches 165.32 mAh g-1 and decays to 86.73% after 100 cycles), and the voltage hysteresis after triggering anionic redox has also been clearly ameliorated. Apparently, the high-entropy strategy not only satisfactorily optimizes the lattice structure and stability of the cathode material during sodium intercalation/de-intercalation process, but also increases the ion mobilization rate and promotes further electrochemical properties due to surface modification. In summary, this study provides valuable ideas for the design of cobalt/nickel-free cathodes with excellent electrochemical performance. © 2024, The Authors. All rights reserved.

关键词： Sodium-ion batteries

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Flexible three-dimensional integrated circuits (3D ICs) based on liquid metal

Wearable Electronics

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Wearable Electronics 2025年 2卷 1-17页

作者： Ruiwen Tian Jianhui Chen Ming Zhu Dianpeng Qi Xiaodong Chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 PR China Innovative Center for Flexible Devices (iFLEX) Max Planck-NTU Joint Lab for Artificial Senses School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Key Laboratory of Science and Engineering for the Multi-modal Prevention and Control of Major Chronic Diseases Ministry of Industry and Information Technology Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou 450000 PR China

The rapid advancement of flexible electronics has unlocked opportunities across diverse fields, including medical science and device engineering. Developing flexible three-dimensional integrated circuits (3D ICs) is a key strategy for driving the miniaturisation, wearability and multifunctionality of flexible devices. Among these innovations, liquid metal-based flexible electronics have elicited significant attention due to their exceptional conductivity, high stretchability and low toxicity. This review highlights recent research breakthroughs in the application of liquid metal for flexible 3D ICs, providing a detailed discussion of the design concepts and strategies for patterning and interconnection structures that harness the unique properties of liquid metal. Using 3D printing technology to fabricate high-resolution, durable 3D ICs from liquid metal represents a major research direction. Moreover, advanced fabrication methods diverging from conventional 3D printing systems are explored. Finally, we examine persistent challenges and offer a forward-looking perspective on the potential of liquid metal-based flexible 3D ICs to revolutionise human–machine interactions and enable intelligent living.

关键词： Liquid metal Gallium–indium alloy Flexible electronics Three-dimensional Integrated circuit 3D printing

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Electrospun Tio2-Bi@C Nanofibers with Excellent Potassium Storage Performance

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SSRN 2024年

作者： Luo, Junwei Liu, Li Liu, Shaoxiong Li, Zhou Yang, Jianping Huang, Zhifeng Hu, Hai National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education School of Chemistry Xiangtan University Xiangtan411105 China

TiO2 and Bi encapsulated in carbon nanofibers (TiO2-Bi@C NFs) have been prepared through electrospinning followed by annealing. One-dimensional carbon matrix combined with TiO2 nanoparticles effectively relieve the stress resulting in the huge volume fluctuation of Bi during potassaition/depotassaition processes and boost the ion/electron conductivity. Thus, in the realm of potassium-ion batteries, TiO2-Bi@C NFs couples the advantages of high cycling stability of TiO2 and high specific capacity of metallic Bi, which could supply a superior reversible specific capacity of 420.1 mAh g−1 at 20 mA g−1 and maintain a stable capacity of 128.8 mAh g−1 after 500 cycles at 500 mA g−1 with a capacity preservation rate of 69.2%. It suggests that TiO2-Bi@C NFs are highly likely to become a reliable choice for the next generation of PIBs anode materials. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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Realization of blue-red dual-emission via energy transfer in Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ phosphor for plant growth application

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Journal of Rare Earths 2024年

作者： Ruijie Ji Takatoshi Seto Yuhua Wang National and Local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University Lanzhou 730000 China

A blue-red dual-emitting phosphor, Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ was developed in this study. Eu 2+ acts as a sensitizer ion in Na 3 KMg 7 (PO 4 ) 6 : Mn 2+ , which significantly improves the undesirable luminous efficiency of Mn 2+ . The energy transfer between Eu 2+ and Mn 2+ significantly boosts both internal quantum efficiency (IQE) and external quantum efficiency (EQE) of the phosphor, achieving values of 72.5% and 42.6%, respectively. Additionally, the phosphor demonstrates exceptional thermal stability, at 150 °C, maintaining 71.49% of its initial emission intensity. The emission spectrum of the phosphor closely matches the chlorophyll’s absorption spectra, with similarities of 75.06% and 94.52%, respectively. This was further confirmed through a fabricated LED with a n-UV chip (395 nm). To further assess the potential for agritech applications, a light-conversion film incorporating the developed phosphor in PDMS glue was prepared. An outdoor cultivation trial with Chlorella showed that the algae's growth rate improves by 27.3% relative to a control group. These results reveal the significant potential of the Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ phosphor for enhancing plant growth in practical applications.

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