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Intermediates transformation for efficient perovskite solar cells

Journal of Energy Chemistry 2021年第1期30卷 102-114,I0004页

作者： Zhizai Li Yi Sun Huanhuan Yao Jing Zhao Qian Wang Liming Ding Zhiwen Jin School of Physical Science and Technology&Key Laboratory for Magnetism and Magnetic Materials of MoE&Key Laboratory of Special Function Materials and Structure Design MoE&National&Local Joint Engineering Laboratory for Optical Conversion Malerials and TechnologyLanzhou UniversiyLanzhou 730000 GansuChina School of Physics Changhi UnversityChornghi 830100 Xinjiang Uygur Autonomous RegionChina Center for Excllence in Nanoscience(CAS) Key Laboratony of Nonosystem anp Hierarchical Fabrication(CAS)Nationol Center for Nanoscience and TechnologyBeijing 100190China

Perovskite materials have made a great progress in terms of the power conversion efficiency(PCE), rising from 3.8% to 25.2%. To obtain pinhole-free, superior crystal, and high-quality perovskite films with less defect, intermediates transformation is important, which has been clearly studied and widely *** this review, we systematically summarize the commonly formed intermediates and detailedly analyze their mechanisms from five aspects:(1) Solvent-induced intermediate;(2) HI-induced intermediate;(3)CH3NH2-induced intermediate;(4) MAAc-induced intermediate;(5) other intermediates. Finally, we also provide some prospects on high-quality perovskite fabrication based on using intermediates prudently.

关键词： Intermediate Formation energy Crystalline dynamics Solubility Nucleation sites

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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

SSRN

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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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Microstructured capacitive sensor with broad detection range and long-term stability for human activity detection

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npj Flexible Electronics 2021年第1期5卷 141-149页

作者： Xin He Zhihao Liu Gengzhe Shen Xiang He Jionghong Liang Yu Zhong Tianlong Liang Jie He Yue Xin Chi Zhang Dongdong Ye Guofa Cai School of Applied Physics and Materials Wuyi UniversityJiangmenPeople’s Republic of China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-efficiency Display and Lighting TechnologySchool of Materials and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengPeople’s Republic of China School of Materials and Energy Guangdong University of TechnologyGuangzhouPeople’s Republic of China School of Textile Materials and Engineering Wuyi UniversityJiangmenPeople’s Republic of China

In recent years,flexible stress sensors capable of monitoring diverse body movements and physiological signals have been attracting great attention in the fields of healthcare systems,human–machine interfaces,and wearable *** by the structure of natural eggshell inner membrane(ESIM),we developed a pressure sensor based on MXene(Ti_(3)C_(2)T_(x))/Ag NWs(silver nanowires)composite electrodes and the micro-structured dielectric layer to meet the application requirements of wide detection range and long-term stability for the *** the light of the nanoscale-microarray of the dielectric layer and the rough surface of electrode materials,this pressure sensor is expected to allow great and persistent deformation during the loading *** a result,the device is characterized by an improved sensitivity,fast response(in the millisecond range),wide detection range(0–600 kPa),and long-term *** outstanding performance of the proposed sensor makes it possible to detect various human activities,such as speaking,air blowing,clenching,walking,finger/knee/elbow bending,and striking,demonstrating its good application prospects in wearable and flexible electronic devices.

关键词： stability wear Microstructure

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Improving Structure Stability of Single-Crystalline Ni-Rich Cathode at High-Voltage by Element Gradient Doping and Interfacial Modification

SSRN

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SSRN 2024年

作者： Wang, Ruijuan Zhang, Yixu Li, Zhi Wu, Lei Chen, Jiarui Liu, Xiaolin Hu, Hui Cao, Shuang Ding, Hao Wei, Qiliang Wang, Xianyou National Base for International Science & Technology Cooperation of New Energy Equipment Energy Storage Materials and Devices 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 Hunan411105 China Institute of Micro/Nano Materials and Devices Ningbo University of Technology Zhejiang Ningbo315211 China

Single-Crystalline (SC) Ni-Rich cathode materials for advanced lithium-ion batteries have attracted enormous interest because they can provide greater capacity retention and longer cyclic stability than their polycrystalline counterparts. However, the irreversible release of lattice oxygen and structural instability during high cut-off voltage operation greatly hinder their practical applications. Here, via a one-step calcination process, a combination strategy based on the uniform surface Li4TeO5 coating and bulk Te gradient doping is proposed to solve the above intrinsic instability issues of single-crystalline LiNi0.90Co0.05Mn0.05O2 (LTeO-1.0). The mechanical properties and modulating mechanisms of LTeO-1.0 are investigated by atomic force microscopy (AFM). It has been found that the Li4TeO5 coating layer with good ionic conductivity, not only enhances the surface Young’s modulus of LTeO-1.0 to reduce grain fragmentation but also suppresses parasitic reactions and the dissolution of transition metals. Concurrently, Te element gradient doping leads to the formation of robust Te-O bonds that effectively inhibit H2-H3 phase transformations and lattice oxygen release. Based on the synergistic effect, the LTeO-1.0 cathode material represents high cycling durability and superior rate performance at high voltages. This research provides an accessible approach to promote the application of SC Ni-rich cathode materials in lithium-ion batteries. © 2024, The Authors. All rights reserved.

关键词： Cathodes

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Tempura-like carbon/carbon composite as advanced anode materials for K-ion batteries

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Journal of Energy Chemistry 2021年第8期30卷 589-598,I0012页

作者： Hao-Jie Liang Zhen-Yi Gu Xue-Ying Zheng Wen-Hao Li Ling-Yun Zhu Zhong-Hui Sun Yun-Feng Meng Hai-Yue Yu Xian-Kun Hou Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University) Ministry of EducationChangchun 130103China Institute of New Energy for Vehicles Tongji University201804 ShanghaiChina CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology100190 BeijingChina Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringMOE Key Laboratory for Water Quality and Conservation of the Pearl River DeltaGuangzhou UniversityGuangzhou 510006China National&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024China

Graphite as a promising anode candidate of K-ion batteries(KIBs)has been increasingly studied currently,but corresponding rate performance and cycling stability are usually inferior to amorphous carbon *** protect the layer structure and further boost performance,tempura-like carbon/carbon nanocomposite of graphite@pitch-derived S-doped carbon(G@PSC)is designed and prepared by a facile and low-temperature modified molten salt *** robust encapsulation structure makes their respective advantages complementary to each other,showing mutual promotion of electrochemical performances caused by synergy *** a result,the G@PSC electrode is applied in KIBs,delivering impressive rate capabilities(465,408,370,332,290,and 227 m A h g^(-1)at 0.05,0.2,0.5,1,2,and 5 A g^(-1))and ultralong cyclic stability(163 m A g^(-1)remaining even after 8000 cycles at 2 A g^(-1)).On basis of ex-situ studies,the sectionalized K-storage mechanism with adsorption(pseudocapacitance caused by S doping)-intercalation(pitch-derived carbon and graphite)pattern is ***,the exact insights into remarkable rate performances are taken by electrochemical kinetics tests and density functional theory *** a word,this study adopts a facile method to synthesize high-performance carbon/carbon nanocomposite and is of practical significance for development of carbonaceous anode in KIBs.

关键词： K-ion batteries Anode materials Carbon/carbon composite S doping Cyclic stability DFT calculation

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Effect of different calcium sulfate aspect ratios and chitosan addition methods on the interface properties of calcium sulfate/chitosan composite bone cement

MedComm - Biomaterials and Applications

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MedComm - Biomaterials and Applications 2024年第4期3卷

作者： Jiang, Liuyun Tang, Chunyan Tang, Shuo Wang, Yuqing Ouyang, Qi Hu, Xiang National & Local Joint Engineering Laboratory for New Petro-Chemical Materials and Fine Utilization of Resources Key Laboratory of Light Energy Conversion Materials of Hunan Province College College of Chemistry and Chemical Engineering Hunan Normal University Changsha China State Key Laboratory Developmental Biology of Freshwater Fish School Life Science Hunan Normal University Changsha China

It is a great challenge to improve the properties of pure calcium sulfate bone cement. Here, two calcium sulfate hemihydrate powders with different aspect ratios were prepared, and three chitosan addition methods were adopted to investigate the effect on the surface and interface properties of calcium sulfate/chitosan composite bone cement. The results showed that it lacked chemical bond between chitosan and calcium sulfate, and the short rod calcium sulfate displayed better interface adhesion with chitosan owing to its smaller size, so it possessed shorter setting time, better compressive strength and slower degradation than the long rod calcium sulfate, while the biocompatibility had no remarkable difference. Moreover, chitosan solution as liquid phase was a better solidification mode than citric acid, and calcium sulfate/chitosan composite as solid phase was the worst mode because of poor interface compatibility. Conclusively, it was a simple, low-cost, and effective preparation process to choose short rod calcium sulfate powder as solid phase and 1 wt% chitosan solution as liquid phase, which could achieve calcium sulfate/chitosan composite bone cement with the best properties, including setting time, compressive strength, degradation rate, and biocompatibility, displaying a promising application in bone defect repair. © 2024 The Author(s). MedComm – Biomaterials and Applications published by John Wiley & Sons Australia, Ltd on behalf of Sichuan International Medical Exchange & Promotion Association (SCIMEA).

关键词： biodegradable calcium sulfate chitosan injectable

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Breaking the periodic arrangement of atoms for the enhanced electrochemical reduction of nitrogen and water oxidation

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Science China materials 2022年第1期65卷 147-154页

作者： Shilong Jiao Xianwei Fu Shuangchen Ruan Yu-Jia Zeng Hongwen Huang College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Key Lab for Special Functional Materials of Ministry of Education Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Henan UniversityKaifeng 475004China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China

The development of cost-effective and highperformance electrocatalysts has been increasingly studied to mitigate upcoming energy and environmental *** and heterointerface engineering have played significant roles in the rational design of electrocatalysts and modulation of their electrocatalytic ***,the synergistic effect between amorphization and heterointerfaces has been scarcely *** a proof-of-concept attempt,we develop amorphous FeMo(a-FeMo)electrocatalysts with an abundance of heterointerfaces that are composed of amorphous components and evaluate their electrocatalytic performances toward the nitrogen reduction reaction and oxygen evolution reaction(OER).Benefitting from the synergistic effect between the amorphous nature of the a-FeMo electrocatalysts,which offer a high density of active sites,and significant electron redistribution at the heterointerfaces,the electrocatalysts exhibit a high Faradaic efficiency of 29.15%,an elevated yield rate of 71.78μg_(NH_(3)) mg_(cat.)^(-1) h^(-1) with long-term stability at a potential of-0.1V *** hydrogen electrode and excellent electrocatalytic activity toward the *** study provides a promising and effective method for the rational design of low-cost heterogeneous catalysts with desirable efficiency,selectivity,and stability.

关键词： amorphism and heterointerface nitrogen reduction reaction OER electrocatalyst design electrocatalytic conversion

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Construction and Regulation of a Perovskite-Type Sulfur Reduction Catalyst Based on Oxygen Vacancy engineering for Advanced Lithium-Sulfur Batteries

SSRN

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SSRN 2024年

作者： Huang, Xuelin Zeng, Peng Lu, Yunfeng Yang, Juan Chen, Manfang Liu, Hong 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 Key Laboratory for Theoretical Organic Chemistry and Functional Molecules Ministry of Education Hunan University of Science and Technology Xiangtan411201 China

Lithium-sulfur batteries are considered as a promising energy storage solution due to their considerably high theoretical capacity of 1675 mAh g-1 and high energy density of 2600 Wh kg-1. Nevertheless, the lithium-sulfur batteries in commercial application is facing some challenges such as the shuttle effect. In this paper, the perovskite-type La2Ti2O7-x with oxygen defect is developed and applied as an advanced catalyst in lithium-sulfur batteries. It is found that La2Ti2O7-x with oxygen defects can not only strengthen the chemical binding between the metal sites and LiPSs, but also provide additional adsorption and catalytic sites. The as-prepared La2Ti2O7-x/S cathodes exhibit a high initial discharge specific capacity of 1047 mAh g-1 at 1 C (1 C=1675 mA g-1), and a capacity decay rate of merely 0.089% per cycle after 500 cycles. Therefore, this study demonstrates a significant approach to producing high-performance lithium-sulfur batteries using perovskite transition metal oxides as high efficiency electrocatalyst. © 2024, The Authors. All rights reserved.

关键词： Transition metals

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Self-cleaning and Oil/Water Separation of 3D Network Super-hydrophobic Bead-like Fluorinated Silica Pellets/Poly(aryl ether ketone)Composite Membrane Fabricated via a Facile One-step Electrospinning

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Chemical Research in Chinese Universities 2020年第6期36卷 1320-1325页

作者： CUI Zengduo WANG Yongpeng LIU Mengzhu ZHANG Haibo JIANG Zhenhua National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of ChemistryJilin UniversityChangchun 130012P.R.China College of Materials Science and Engineering Jilin Institute of Chemical TechnologyJilin 132022P.R.China

Novel super-hydrophobic fluorinated silica pellets/poly(aryl ether ketone)composite membranes with controllable structure have been prepared through incorporating poly(aryl ether ketonc)s with(3-triluoromethyl)-phenyl side groups and fluorinated silica pellets(F-SiO2)by a facile one-step *** the condition of adding 50%(mass fraction)F-SiO2 in the composite membrane,the water contact angle(WCA)reached its maximum(157°±4.3°).The controllable micro/nano-structures grown on the electrospun fibers could be regulated by the F-SiO2 loading,which was illustrated by scanning clectron microscopy(SEM).Moreover,these super-hydrophobic mem-branes also demonstrated excellent durability,anti-fouling property and oil-water separation ability after 200 h of water *** promising PAEK composite membranes with controllable structure have the potential values in large-scale application of filtration,oil-water separation and antifouling.

关键词： Poly(aryl ecther ketonc) Electrospinning Super-hydrophobic membrane Self-cleaning

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