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学者姓名：陈奇俤
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Abstract ：
针对传统材料科学与工程专业综合实验教学现状及存在的问题，提出课题结合式的综合实验教学改革.课题结合式的综合实验使学生由被动转为主体，自主进行实验方案设计、样品制备、材料表征及性能分析，结果分析与讨论，从而培养学生理论联系实践、提出问题、分析问题和解决问题的能力，培养学生的团队协作能力和专业交流能力，为学生毕业后走上工作岗位打下良好的基础.
Keyword ：
材料科学与工程 材料科学与工程 综合实验 综合实验 课题结合式 课题结合式
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| GB/T 7714 | 陈奇俤 , 陈青青 , 蔡道平 . 材料科学与工程专业课题结合式的综合实验教学探索 [J]. | 兰州文理学院学报(自然科学版) , 2024 , 38 (03) : 124-128 . |
| MLA | 陈奇俤 等. "材料科学与工程专业课题结合式的综合实验教学探索" . | 兰州文理学院学报(自然科学版) 38 . 03 (2024) : 124-128 . |
| APA | 陈奇俤 , 陈青青 , 蔡道平 . 材料科学与工程专业课题结合式的综合实验教学探索 . | 兰州文理学院学报(自然科学版) , 2024 , 38 (03) , 124-128 . |
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Rechargeable lithium-sulfur (Li-S) batteries have received ever-increasing attention owing to their ultrahigh theoretical energy density, low cost, and environmental friendliness. However, their practical application is critically plagued by the sluggish reaction kinetics, shuttling of soluble polysulfide intermediates, and uncontrollable growth of Li dendrites. Herein, a bimetallic telluride electrocatalyst with dense heterointerfaces and rich defects embedded in hollow carbon polyhedron bunches (N subset of CoTe1-x/ZnTe1-y@NC, abbreviated as NCZTC) is rationally designed to simultaneously address the S cathode and Li anode problems. Both experimental and computational results substitute the integration of dense heterointerfaces and rich defects can synergistically modulate the electronic structure, enhance the electrical conductivity, promote the Li+ transportation, strengthen the polysulfides adsorption and improve the catalytic activity, thereby significantly accelerating the redox conversion kinetics and prevent the dendrite growth. Consequently, Li-S batteries with NCZTC-modified separators demonstrate excellent electrochemical performance including high specific discharge capacity, remarkable rate capability, good long-term cycling stability, and competitive areal capacity even at high sulfur loading and lean electrolyte conditions. This study not only provides valuable guidance for designing efficient sulfur electrocatalysts with transition metal tellurides but also emphasizes the importance of heterostructure design and defect engineering for high-performance Li-S batteries. The high-efficiency N subset of CoTe1-x/ZnTe1-y@NC electrocatalyst is rationally designed for Li-S batteries. Both experimental and theoretical results substantiate that the integration of dense heterointerfaces and rich defects (Te vacancy-induced N-doping) can synergistically accelerate the sulfur conversion and protect the lithium anode from corrosion. This study provides an innovative strategy for constructing high-performance sulfur electrocatalysts with transition metal tellurides. image
Keyword ：
bimetallic tellurides bimetallic tellurides defects defects electrocatalysts electrocatalysts heterointerfaces heterointerfaces lithium-sulfur batteries lithium-sulfur batteries
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| GB/T 7714 | Wu, Xiangpeng , Xie, Rongjun , Cai, Daoping et al. Engineering Defect-Rich Bimetallic Telluride with Dense Heterointerfaces for High-Performance Lithium-Sulfur Batteries [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (26) . |
| MLA | Wu, Xiangpeng et al. "Engineering Defect-Rich Bimetallic Telluride with Dense Heterointerfaces for High-Performance Lithium-Sulfur Batteries" . | ADVANCED FUNCTIONAL MATERIALS 34 . 26 (2024) . |
| APA | Wu, Xiangpeng , Xie, Rongjun , Cai, Daoping , Fei, Ban , Zhang, Chaoqi , Chen, Qidi et al. Engineering Defect-Rich Bimetallic Telluride with Dense Heterointerfaces for High-Performance Lithium-Sulfur Batteries . | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (26) . |
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The practical applications of lithium-sulfur (Li-S) batteries are severely impeded by the shuttle effect of soluble lithium polysulfides (LiPSs), sluggish redox reaction kinetics, and insulating nature of sulfur and its discharge products (Li2S2/Li2S). Developing sulfur electrocatalysts with high electrocatalytic activity to accelerate the redox kinetics and polysulfide trapping is critical for Li-S batteries but remains a grand challenge. In this contribution, we demonstrate the delicate design and synthesis of oxygen-incorporated heterophase cobalt vanadium selenide nanoplates with dense crystalline/amorphous interfacial sites (denoted as DC/A O-CoVSe NPs) as high-efficiency sulfur electrocatalysts for Li-S batteries. Such DC/A O-CoVSe NPs possess high electronic conductivity and electrocatalytic activity. Besides, the abundant exposed crystalline/amorphous interfacial sites serve as efficient adsorption-catalytic centers to accelerate the conversion kinetics and alleviate the shuttle effect. Moreover, incorporation of oxygen further increases their affinity to LiPSs because of the introduction of more Li-O interactions. Benefiting from the multifarious advantages, Li-S batteries with DC/A O-CoVSe NP modified separators exhibit high discharge capacity (1400.1 mA h g-1 at 0.1C), excellent rate capability (683.8 mA h g-1 at 5C), and good long-term durability (672.4 mA h g-1 at 1C after 500 cycles with a low decay rate of 0.066% per cycle). Even at a high sulfur loading of 5.6 mg cm-2, the battery still delivers a decent reversible capacity of 658.8 mA h g-1 at 0.2C after 100 cycles, indicating its great potential for practical applications. This work could provide a rational viewpoint for developing high-efficiency sulfur electrocatalysts towards future advanced Li-S energy storage systems. Oxygen-incorporated heterophase cobalt vanadium selenide nanoplates with dense crystalline/amorphous interfacial sites (DC/A O-CoVSe NPs) are developed as high-efficiency sulfur electrocatalysts for lithium-sulfur batteries.
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| GB/T 7714 | Tan, Pengcheng , Yin, Yuan , Cai, Daoping et al. Oxygen-incorporated crystalline/amorphous heterophase cobalt vanadium selenide nanoplates with dense interfacial sites for robust lithium-sulfur batteries [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (6) : 3711-3721 . |
| MLA | Tan, Pengcheng et al. "Oxygen-incorporated crystalline/amorphous heterophase cobalt vanadium selenide nanoplates with dense interfacial sites for robust lithium-sulfur batteries" . | JOURNAL OF MATERIALS CHEMISTRY A 12 . 6 (2024) : 3711-3721 . |
| APA | Tan, Pengcheng , Yin, Yuan , Cai, Daoping , Fei, Ban , Zhang, Chaoqi , Chen, Qidi et al. Oxygen-incorporated crystalline/amorphous heterophase cobalt vanadium selenide nanoplates with dense interfacial sites for robust lithium-sulfur batteries . | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (6) , 3711-3721 . |
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Electrocatalytic conversion of soluble lithium polysulfides (LiPSs) has been proposed as a crucial approach to address the drawbacks of lithium-sulfur (Li-S) batteries. However, it still remains a great challenge to realize the integration of strong adsorption and high catalytic activity within a single electrocatalyst. Herein, we conceptually demonstrate the rational design and synthesis of a crystalline Bi2Se3 and amorphous BiOx heterostructure (denoted as c-Bi2Se3/a-BiOx) as an advanced separator modifier for Li-S batteries. In such a heterostructure, a-BiOx has strong chemical adsorption ability toward LiPSs and c-Bi2Se3 possesses high catalytic activity for LiPS conversion. Meanwhile, the heterointerface enables rapid diffusion of LiPSs from a-BiOx to c-Bi2Se3, thus synergistically contributing to the highly efficient adsorption-diffusion-conversion process of LiPSs. Benefiting from these advantages, Li-S batteries using a c-Bi2Se3/a-BiOx heterostructure modified separator exhibit excellent electrochemical performance in terms of high discharge capacity (1517.9 mA h g(-1) at 0.1C), outstanding rate capacity (873.1 mA h g(-1) at 4C) and long-term cycling stability with a low capacity decay rate of 0.041% per cycle over 1000 cycles at 1C. Furthermore, a remarkable areal capacity of 3.85 mA h cm(-2) can be achieved at a high sulfur loading of 5.5 mg cm(-2). This work provides valuable insight into the development of crystalline/amorphous heterostructures as robust and highly active electrocatalysts for high-performance Li-S batteries.
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| GB/T 7714 | Wu, Xiangpeng , Shen, Zewei , Cai, Daoping et al. Amorphous/crystalline heterostructure design enables highly efficient adsorption-diffusion-conversion of polysulfides for lithium-sulfur batteries [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (34) : 18313-18322 . |
| MLA | Wu, Xiangpeng et al. "Amorphous/crystalline heterostructure design enables highly efficient adsorption-diffusion-conversion of polysulfides for lithium-sulfur batteries" . | JOURNAL OF MATERIALS CHEMISTRY A 11 . 34 (2023) : 18313-18322 . |
| APA | Wu, Xiangpeng , Shen, Zewei , Cai, Daoping , Fei, Ban , Zhao, Mincai , Fu, Junjie et al. Amorphous/crystalline heterostructure design enables highly efficient adsorption-diffusion-conversion of polysulfides for lithium-sulfur batteries . | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (34) , 18313-18322 . |
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Lithium-sulfur batteries (LSBs) are appealing energy storage systems by virtue of the high theoretical energy density and abundant resources of sulfur. However, the sluggish redox reaction kinetics and shuttle effect of soluble lithium polysulfides (LiPSs) seriously restrict their practical applications. Searching for highly efficient and low cost electrocatalysts towards LiPSs conversion is one of the most promising approaches to relieve the shuttle effect and enhance the sulfur utilization. In this work, we first demonstrate the application of ternary iron molybdenum nitride hybridized with nitrogen-doped carbon, denoted as (Fe0.81Mo0.19)MoN2/NC composite, as an advanced separator modifier to boost the bidirectional catalytic conversion of LiPSs. Impressively, the as-fabricated LSBs with (Fe0.81Mo0.19)MoN2/NC modified separator display an ultrahigh initial discharge capac-ity of 1366.1 mAh g-1 at 0.1 C and still remains a high value of 809.1 mAh g-1 at a high rate of 4 C. Furthermore, a remarkable discharge capacity of 569.2 mAh g-1 is retained when cycling at a high rate of 1 C for 700 cycles (corresponding to a low attenuation rate of 0.065 % per cycle), indicating the good long-term cycling stability. The excellent performance could be attributed to the multiple advantages of high electrical conductivity, numerous active sites, strong adsorption ability and excellent catalytic activity, thereby effectively suppressing the shuttle effect of LiPSs. The present work indicates that the ternary transition metal nitrides could be promising separator modifiers for high-performance LSBs.
Keyword ：
Composite Composite Lithium-sulfur batteries Lithium-sulfur batteries Modified separators Modified separators Shuttle effect Shuttle effect Transition metal nitrides Transition metal nitrides
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| GB/T 7714 | Zhang, Xudong , Zhao, Mincai , Cai, Daoping et al. Separator modified by ternary iron molybdenum nitride and nitrogen-doped carbon composite enabling efficient polysulfide conversion for lithium-sulfur batteries [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 967 . |
| MLA | Zhang, Xudong et al. "Separator modified by ternary iron molybdenum nitride and nitrogen-doped carbon composite enabling efficient polysulfide conversion for lithium-sulfur batteries" . | JOURNAL OF ALLOYS AND COMPOUNDS 967 (2023) . |
| APA | Zhang, Xudong , Zhao, Mincai , Cai, Daoping , Zhang, Chaoqi , Chen, Qidi , Zhan, Hongbing . Separator modified by ternary iron molybdenum nitride and nitrogen-doped carbon composite enabling efficient polysulfide conversion for lithium-sulfur batteries . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 967 . |
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Abstract ：
Lithium-sulfur (Li-S) batteries have attracted widespread attention because of their high energy density, low cost and environmentally friendly nature. Unfortunately, the practical applicability of Li-S batteries is seriously restricted by the shuttle effect and sluggish reaction kinetics of soluble lithium polysulfides (LiPSs). Herein, strong topological insulator (TI) Bi2Se3 and weak TI BiSe with unique cloud-like hollow structures have been rationally synthesized and employed as separator modifiers for Li-S batteries. The strong TI Bi2Se3 possesses abundant active sites, high electrical conductivity, strong chemical adsorption, superior catalytic activity and robust surface states, which significantly accelerates the redox conversion kinetics, mitigates the shuttle effect of LiPSs and improves the sulfur utilization. Consequently, Li-S batteries with strong TI Bi2Se3 modified separators demonstrate impressive practical prospects in terms of high discharge capacity (1568.8 mA h g-1 at 0.1C), remarkable rate capability (866.3 mA h g-1 at 5.0C) and a stable capacity of 524.3 mA h g-1 over 500 cycles at 1C (corresponding to a capacity decay rate of 0.086%). The performance enhancements are further supported by theoretical calculations. This work might provide valuable insights into the delicate design and synthesis of TI materials with desired morphology and structure to boost their performance for energy storage. Topological insulator Bi2Se3 with a unique cloud-like hollow structure was synthesized and employed as a separator modifier for lithium-sulfur batteries, which can significantly accelerate sulfur conversion kinetics and mitigate the shuttle effect.
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| GB/T 7714 | Zhao, Mincai , Fu, Junjie , Cai, Daoping et al. Topological insulator bismuth selenide with a unique cloud-like hollow structure as a bidirectional electrocatalyst for robust lithium-sulfur batteries [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (44) : 24089-24098 . |
| MLA | Zhao, Mincai et al. "Topological insulator bismuth selenide with a unique cloud-like hollow structure as a bidirectional electrocatalyst for robust lithium-sulfur batteries" . | JOURNAL OF MATERIALS CHEMISTRY A 11 . 44 (2023) : 24089-24098 . |
| APA | Zhao, Mincai , Fu, Junjie , Cai, Daoping , Zhang, Chaoqi , Fei, Ban , Zhang, Yinggan et al. Topological insulator bismuth selenide with a unique cloud-like hollow structure as a bidirectional electrocatalyst for robust lithium-sulfur batteries . | JOURNAL OF MATERIALS CHEMISTRY A , 2023 , 11 (44) , 24089-24098 . |
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Poly (triazine imide) photocatalysts prepared via molten salt methods emerge as promising polymer semiconductors with one-step excitation capacity of overall water splitting. Unveiling the molecular conjugation, nucleation, and crystallization processes of PTI crystals is crucial for their controllable structure design. Herein, microscopy characterization was conducted at the PTI crystallization front from meso to nano scales. The heptazine-based precursor was found to depolymerize to triazine monomers within molten salts and KCl cubes precipitate as the leading cores that guide the directional stacking of PTI molecular units to form aggregated crystals. Upon this discovery, PTI crystals with improved dispersibility and enhanced photocatalytic performance were obtained by tailoring the crystallization fronts. This study advances insights into the directional assembling of PTI monomers on salt templates, placing a theoretical foundation for the ordered condensation of polymer crystals.
Keyword ：
Directional Conjugation Directional Conjugation Molten Salts Molten Salts Overall Water Splitting Overall Water Splitting Photocatalyst Photocatalyst Polymeric Carbon Nitride Polymeric Carbon Nitride
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| GB/T 7714 | Liang, Xiaocong , Xue, Sikang , Yang, Can et al. The Directional Crystallization Process of Poly (triazine imide) Single Crystals in Molten Salts [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2023 , 62 (14) . |
| MLA | Liang, Xiaocong et al. "The Directional Crystallization Process of Poly (triazine imide) Single Crystals in Molten Salts" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 62 . 14 (2023) . |
| APA | Liang, Xiaocong , Xue, Sikang , Yang, Can , Ye, Xiaoyuan , Wang, Yulan , Chen, Qidi et al. The Directional Crystallization Process of Poly (triazine imide) Single Crystals in Molten Salts . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2023 , 62 (14) . |
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Rational design and synthesis of advanced sulfur host materials has been regarded as an effective strategy to address the critical challenges of lithium-sulfur (Li-S) batteries including shuttle effect of lithium polysulfides (LiPSs), sluggish reaction kinetics, and huge volume change of sulfur. In this work, we demonstrate the rational construction of a multifunctional sulfur host grown on carbon cloth consisting of self-supported porous VN arrays coupled with MOF-derived N-doped carbon nanotubes embedded with tiny Co nanoparticles (named CC/VN/ Co@NCNTs). This unique electrode design possesses a series of advantages such as high electrical conductivity, strong physical/chemical confinement of LiPSs, favorable catalytic activity, fast reaction kinetics, effective volumetric accommodation, good mechanical stability and high sulfur loading. As expected, when evaluated as self-standing and binder-free cathode for Li-S batteries, the CC/VN/Co@NCNTs/S exhibits a high initial discharge capacity of 1130.4 mAh g(-1) at 0.1C and maintains 864.1 mAh g(-1) after 100 cycles, along with outstanding rate performance (625.3 mAh g(-1) at 5C) and superior long-term cycling stability with a low capacity decay rate of 0.063% per cycle at 1C for 500 cycles. Moreover, the CC/VN/Co@NCNTs/S delivers high reversible capacities of 847.6, 668.3, and 581.1 mAh g(-1) at 0.1C after 100 cycles at different high sulfur loadings of 2.8, 5.2, and 7.8 mg cm(-2), respectively. The present work might provide an effective strategy to directly construct multifunctional sulfur host materials on current collectors for high-performance Li-S batteries.
Keyword ：
Flexible Flexible Lithium-sulfur batteries Lithium-sulfur batteries Multifunctional Multifunctional Sulfur hosts Sulfur hosts Transition metal nitrides Transition metal nitrides
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| GB/T 7714 | Cai, Daoping , Zhuang, Yaxuan , Fei, Ban et al. Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries [J]. | CHEMICAL ENGINEERING JOURNAL , 2022 , 430 . |
| MLA | Cai, Daoping et al. "Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries" . | CHEMICAL ENGINEERING JOURNAL 430 (2022) . |
| APA | Cai, Daoping , Zhuang, Yaxuan , Fei, Ban , Zhang, Chaoqi , Wang, Yaguang , Chen, Qidi et al. Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries . | CHEMICAL ENGINEERING JOURNAL , 2022 , 430 . |
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Manganese-based materials have been considered as promising electrode materials for aqueous zinc-ion batteries (ZIBs). However, the development of manganese-based materials is seriously restricted by their low electrical conductivity and sluggish reaction kinetics. In the present work, ultrathin birnessite-type delta MnO2 nanosheets branched onto N-doped carbon nanotubes grown on carbon cloth substrate (CC/NCNTs/delta MnO2) have been rational synthesized as a binder-free cathode electrode for aqueous ZIBs. The CC/NCNTs/delta MnO2 cathode possesses the desired merits including high electrical conductivity, large specific surface area, abundant active sites, fast ion diffusion, good structural stability and free of any polymer binders. When evaluated as a binder-free cathode electrode for aqueous ZIBs, the CC/NCNTs/delta-MnO2 exhibits high areal capacity and energy density of 1.95 mAh cm-2 and 2.56 mWh cm-2 at a current density of 0.4 mA cm-2, respectively, as well as decent rate capability and cycling stability. This work could provide an effective method to construct high-performance binder-free cathode electrodes for aqueous ZIBs. (c) 2022 Elsevier B.V. All rights reserved.
Keyword ：
Aqueous zinc-ion batteries Aqueous zinc-ion batteries Binder-free Binder-free Cathode Cathode Hybrid structures Hybrid structures
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| GB/T 7714 | Zhao, Mincai , Luo, Yafang , Zhu, Longzhen et al. Ultrathin ?-MnO2 nanosheets branched onto N-doped carbon nanotubes as binder-free cathode electrodes for aqueous zinc-ion batteries with a high areal capacity [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 913 . |
| MLA | Zhao, Mincai et al. "Ultrathin ?-MnO2 nanosheets branched onto N-doped carbon nanotubes as binder-free cathode electrodes for aqueous zinc-ion batteries with a high areal capacity" . | JOURNAL OF ALLOYS AND COMPOUNDS 913 (2022) . |
| APA | Zhao, Mincai , Luo, Yafang , Zhu, Longzhen , Cai, Daoping , Zhuang, Yaxuan , Chen, Qidi et al. Ultrathin ?-MnO2 nanosheets branched onto N-doped carbon nanotubes as binder-free cathode electrodes for aqueous zinc-ion batteries with a high areal capacity . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 913 . |
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Abstract ：
扫描电镜实验教学在工程教育专业认证中具有重要的作用，针对专业认证背景下材料类专业扫描电镜实验教学存在的问题，提出基于“金课”视角的实验教学改革措施，通过优化实验教学内容，拓展课程深度，引入多媒体、慕课、虚拟与仿真，强化工程实例的案例教学等创新教学方式，构建“过程+结果”评价标准等措施，切实提高扫描电镜实验教学效果，提高学生分析问题与解决问题的能力，创新思维能力和实践能力，真正达到材料类专业学生毕业出口的要求和培养目标。
Keyword ：
专业认证 专业认证 慕课 慕课 扫描电镜 扫描电镜 虚拟与仿真 虚拟与仿真 金课 金课
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| GB/T 7714 | 陈奇俤 , 吕秋丰 . 基于“金课”视角的扫描电镜实验教学改革 [J]. | 实验室科学 , 2022 , 25 (04) : 164-167 . |
| MLA | 陈奇俤 et al. "基于“金课”视角的扫描电镜实验教学改革" . | 实验室科学 25 . 04 (2022) : 164-167 . |
| APA | 陈奇俤 , 吕秋丰 . 基于“金课”视角的扫描电镜实验教学改革 . | 实验室科学 , 2022 , 25 (04) , 164-167 . |
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