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学者姓名：张跃飞
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摘要 ：
The penetrating growth of Li into the inorganic solid-state electrolyte (SSE) is one key factor limiting its practical application. Research to understand the underlying mechanism of Li penetration has been ongoing for years and is continuing. Here, we report an in situ scanning electron microscopy methodology to investigate the dynamic behaviors of isolated Li filaments in the garnet SSE under practical cycling conditions. We find that the filaments tend to grow in the SSE, while surprisingly, those filaments can self-dissolve with a decrease in the current density without a reversal of the current direction. We further build a coupled electro-chemo-mechanical model to assess the interplay between electrochemistry and mechanics during the dynamic evolution of filaments. We reveal that filament growth is strongly regulated by the competition between the electrochemical driving force and mechanical resistive force. The numerical results provide rational guidance for the design of solid-state batteries with excellent properties.
关键词 ：
Li filaments Li filaments electro-chemo-mechanicalmodel electro-chemo-mechanicalmodel self-dissolution self-dissolution solid-state electrolytes solid-state electrolytes in situ SEM in situ SEM
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| GB/T 7714 | Cao, Tianci , Xu, Rong , Cheng, Xiaopeng et al. Chemomechanical Origins of the Dynamic Evolution of Isolated Li Filaments in Inorganic Solid-State Electrolytes [J]. | NANO LETTERS , 2024 , 24 (6) : 1843-1850 . |
| MLA | Cao, Tianci et al. "Chemomechanical Origins of the Dynamic Evolution of Isolated Li Filaments in Inorganic Solid-State Electrolytes" . | NANO LETTERS 24 . 6 (2024) : 1843-1850 . |
| APA | Cao, Tianci , Xu, Rong , Cheng, Xiaopeng , Wang, Mingming , Sun, Tao , Lu, Junxia et al. Chemomechanical Origins of the Dynamic Evolution of Isolated Li Filaments in Inorganic Solid-State Electrolytes . | NANO LETTERS , 2024 , 24 (6) , 1843-1850 . |
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摘要 ：
本发明公开一种大范围高精度的实时表面形貌测量方法及系统，属于表面形貌测量领域。在宏观表面扫描范围内控制样品按照宏观表面扫描步长进行水平面移动，待移动至微观局部扫描范围时，在微观局部扫描范围内控制样品按照微观局部扫描步长进行水平面移动，并在水平面移动过程中随时调整样品的垂向位移，使得反射光斑一直位于位置探测器的中心，根据记录的垂向位移调整值以及对应的扫描位置，输出当前扫描样品的表面形貌成像，并最终形成宏观表面的表面形貌成像和微观局部的表面形貌成像，实现了跨尺度范围的表面形貌成像与微观局部高精度成像。
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| GB/T 7714 | 赵敏 , 吕俊霞 , 张跃飞 et al. 一种大范围高精度的实时表面形貌测量方法及系统 : CN202310285024.5[P]. | 2023-03-22 . |
| MLA | 赵敏 et al. "一种大范围高精度的实时表面形貌测量方法及系统" : CN202310285024.5. | 2023-03-22 . |
| APA | 赵敏 , 吕俊霞 , 张跃飞 , 佟翔宇 , 李睿 . 一种大范围高精度的实时表面形貌测量方法及系统 : CN202310285024.5. | 2023-03-22 . |
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摘要 ：
The particle morphology determined by the sintering process is the director factor affecting the electrochemical performance of Ni-rich NMC cathode materials. To prepare the ideal NMC particles, it is of great significance to understand the morphological changes during sintering process. In this work, the morphology evolution of LiNi0.8Mn0.1Co0.1O2 (NMC811) synthesis at temperature ranging from 300-1080 degrees C were observed by in situ SEM. The uniform mixture of spherical Ni0.8Mn0.1Co0.1(OH)(2) precursor and lithium sources (LiOH) was employed by high temperature solid-state process inside the SEM, which enables us to observe morphology changes in real time. The results show that synthetic reaction of LiNi0.8Mn0.1Co0.1O2 usually includes three processes: the raw materials' dehydration, oxidation, and combination, accompanied by a significant reduction in particle size, which is important reference to control the synthesis temperature. As heating temperature rise, the morphology of mixture also changed from flake to brick-shaped. However, Ni nanoparticle formation is apparent at higher temperature similar to 1000 degrees C, suggesting a structural transformation from a layered to a rock-salt-like structure. Combining the insitu observed changes in size and morphology, and with the premise of ensuring the morphology change from flakes to bricks, reducing the sintering temperature as much as possible to prevent excessive reduction in particle size and layered to a rock-salt structure transformation is recommended for prepare ideal NMC particles. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
关键词 ：
High temperature imaging High temperature imaging In situ SEM In situ SEM Lithium-ion battery Lithium-ion battery NMC cathode NMC cathode Particle morphology Particle morphology
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| GB/T 7714 | Tang, Liang , Cheng, Xiaopeng , Wu, Rui et al. Monitoring the morphology evolution of LiNi0.8Mn0.1Co0.1O2 during high-temperature solid state synthesis via in situ SEM [J]. | JOURNAL OF ENERGY CHEMISTRY , 2022 , 66 : 9-15 . |
| MLA | Tang, Liang et al. "Monitoring the morphology evolution of LiNi0.8Mn0.1Co0.1O2 during high-temperature solid state synthesis via in situ SEM" . | JOURNAL OF ENERGY CHEMISTRY 66 (2022) : 9-15 . |
| APA | Tang, Liang , Cheng, Xiaopeng , Wu, Rui , Cao, Tianci , Lu, Junxia , Zhang, Yuefei et al. Monitoring the morphology evolution of LiNi0.8Mn0.1Co0.1O2 during high-temperature solid state synthesis via in situ SEM . | JOURNAL OF ENERGY CHEMISTRY , 2022 , 66 , 9-15 . |
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摘要 ：
本发明提供了一种扫描电镜中原位观察锂枝晶生长的方法，涉及能源材料原位电子显微学表征技术领域。本发明通过在扫描电镜中组装原位全固态电池，在充放电过程中获取锂枝晶生长的扫描电镜图像，实时检测固态锂电池中锂枝晶的生长状态，包括其形貌、化学成分组成、生长机制等。
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| GB/T 7714 | 程晓鹏 , 曹天赐 , 张跃飞 et al. 一种扫描电镜中原位观察锂枝晶生长的方法 : CN202211576578.2[P]. | 2022-12-09 . |
| MLA | 程晓鹏 et al. "一种扫描电镜中原位观察锂枝晶生长的方法" : CN202211576578.2. | 2022-12-09 . |
| APA | 程晓鹏 , 曹天赐 , 张跃飞 , 刘显强 . 一种扫描电镜中原位观察锂枝晶生长的方法 : CN202211576578.2. | 2022-12-09 . |
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摘要 ：
Although the rapid development of electrical energy storage devices has slowed down environmental pollution, their large-scale application has posed huge challenges to battery-related mineral resources; thus, extending the lifespan of high-voltage lithium cobalt oxide (LCO) is of great importance. Surface oxide coating is considered as the most common low-cost modification method for addressing unstable cycling performance. However, studies have shown that the oxide layer would further react with an electrolyte, while the investigation on the corresponding component evolution is lacking. Herein, a typical example utilizing the above reaction to realize surface reconstruction is presented. Applying atomic layer deposition (ALD), originally, an ultrathin Al2O3 layer is coated on the LCO surface; however, this coating layer has undergone reconstruction after reacting with electrolyte decomposition products during the cycling. Compared with simple coating, the in situ formed Li3AlF6 layer has a tighter binding to the LCO surface while possessing good Li+ conductivity and electrochemical stability. In addition, the unique properties of the ALD technology allow us to achieve ultrathin (1 nm) and conformal coating, which is beneficial for electronic conductivity and cycling stability. Furthermore, the surface phase transition layer stripping failure mechanism has first been revealed to explain the loss of Co and O, while the reconstructed Li3AlF6 effectively suppresses the surface stripping. Thus, excellent high-voltage performance has been realized (an 89% capacity retention after 1000 cycles at 4.5 V and an 88% capacity retention after 200 cycles at 4.6 V). This work casts a new understanding on the surface reconstruction of the oxide coating layer, which is also significant for other electrode materials' modification.
关键词 ：
atomic layer deposition atomic layer deposition Li3AlF6 Li3AlF6 surface reconstruction surface reconstruction surface stripping surface stripping high-voltage LCO high-voltage LCO
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| GB/T 7714 | Wu, Rui , Cao, Tianci , Liu, Huan et al. Ultralong Lifespan for High-Voltage LiCoO2 Enabled by In Situ Reconstruction of an Atomic Layer Deposition Coating Layer [J]. | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (22) : 25524-25533 . |
| MLA | Wu, Rui et al. "Ultralong Lifespan for High-Voltage LiCoO2 Enabled by In Situ Reconstruction of an Atomic Layer Deposition Coating Layer" . | ACS APPLIED MATERIALS & INTERFACES 14 . 22 (2022) : 25524-25533 . |
| APA | Wu, Rui , Cao, Tianci , Liu, Huan , Cheng, Xiaopeng , Liu, Xianqiang , Zhang, Yuefei . Ultralong Lifespan for High-Voltage LiCoO2 Enabled by In Situ Reconstruction of an Atomic Layer Deposition Coating Layer . | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (22) , 25524-25533 . |
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摘要 ：
本发明公开一种扫描电镜中固态电池界面观察的实验装置，所述实验装置包括：压力可调的固态电池固定装置，所述固态电池固定装置包括上夹板和下夹板；所述上夹板和所述下夹板的第一侧通过螺栓固定，所述上夹板和所述下夹板的第二侧通过丝杠传动装置固定；用于实验的固态电池设置在所述上夹板和所述下夹板之间；所述丝杠传动装置用于调节所述上夹板和所述下夹板施加给所述固态电池的压力。本发明通过丝杠传动装置实现精准稳定的调节上夹板和下夹板施加给固态电池的压力，满足了变压力作用下的固态电池的充放电循环原位电化学反应的监测。
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| GB/T 7714 | 程晓鹏 , 张跃飞 , 曹天赐 . 一种扫描电镜中固态电池界面观察的实验装置 : CN202211576601.8[P]. | 2022-12-09 . |
| MLA | 程晓鹏 et al. "一种扫描电镜中固态电池界面观察的实验装置" : CN202211576601.8. | 2022-12-09 . |
| APA | 程晓鹏 , 张跃飞 , 曹天赐 . 一种扫描电镜中固态电池界面观察的实验装置 : CN202211576601.8. | 2022-12-09 . |
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摘要 ：
Electrochemical actuators (EAs) with capabilities of triggering large deformation are attracting great interests because of their low stimulation voltage and high durability. However, porous electrode structures (PESs) with either a large unexpected strain or small-size inserted ions lead to small actuation strain and low energy transduction efficiency. To address this problem, an ideal electrode material, namely, pyrolytic graphite (PG), with an anisotropic densely stacked electrode structure (ASES), was proposed, and the optimal insertion ion, namely, AlCl4- with a large radius, was selected. Simulations show that an ASES presents an increased actuation strain and effectively eliminates unexpected strain. In addition, the insertion of AlCl4- into the graphite layers can lead to a directionally large volume expansion (>230%) due to the low energy barrier and large ionic radius. Experimental results reveal that the PG can expand/contract repeatedly with a high linear strain of approximate to 48% under a zero stress and approximate to 32% under a load of 2.5 MPa. EAs based on PG and AlCl4- achieve excellent actuation efficiency with an energy density of 105.89 J cm(-3), power density of 0.35 W cm(-3) and a high electromechanical transduction efficiency of up to 14.30%. This design method provides a significant way to develop high-performance EAs. (c) 2022 Elsevier Ltd. All rights reserved.
关键词 ：
Large anionic groups Large anionic groups Electrochemical actuators Electrochemical actuators Electromechanical transduction efficiency Electromechanical transduction efficiency Anisotropic expansion Anisotropic expansion
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| GB/T 7714 | Li, Na , Wang, Peng , Shi, Huifeng et al. An ultrahigh efficiency electrochemical actuator [J]. | EXTREME MECHANICS LETTERS , 2022 , 53 . |
| MLA | Li, Na et al. "An ultrahigh efficiency electrochemical actuator" . | EXTREME MECHANICS LETTERS 53 (2022) . |
| APA | Li, Na , Wang, Peng , Shi, Huifeng , Chen, Ya , Yang, Le , Zhang, Yuefei et al. An ultrahigh efficiency electrochemical actuator . | EXTREME MECHANICS LETTERS , 2022 , 53 . |
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摘要 ：
Ti-6Al-4V合金表面超声振动滚压强化研究
关键词 ：
粗糙度参数 粗糙度参数 显微硬度 显微硬度 残余应力 残余应力 超声振动滚压 超声振动滚压 TI-6AL-4V TI-6AL-4V 微观结构 微观结构
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| GB/T 7714 | 席刚 , 刘元铭 , 张跃飞 et al. Ti-6Al-4V合金表面超声振动滚压强化研究 [J]. | 席刚 , 2021 , 29 (1) : 91-96 . |
| MLA | 席刚 et al. "Ti-6Al-4V合金表面超声振动滚压强化研究" . | 席刚 29 . 1 (2021) : 91-96 . |
| APA | 席刚 , 刘元铭 , 张跃飞 , 刘燕萍 , 材料科学与工艺 . Ti-6Al-4V合金表面超声振动滚压强化研究 . | 席刚 , 2021 , 29 (1) , 91-96 . |
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摘要 ：
本文基于自主研发的扫描电子显微镜原位高温拉伸平台,测试样品高温疲劳性能.通过控制恒定应力加载,设计拉-拉疲劳实验,实时观察到纳米尺度疲劳微裂纹萌生扩展过程的微观结构演变过程,得到了高分辨、高放大倍数的实时序列SEM图像,成功实现1000℃高温原位疲劳测试,对于研究纳米尺寸结构材料的高温疲劳失效微观机制有重要意义.
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| GB/T 7714 | 周建力 , 任潇一 , 张宜旭 et al. 基于扫描电镜原位高温疲劳测试方法研究 [J]. | 电子显微学报 , 2021 , 40 (3) : 215-220 . |
| MLA | 周建力 et al. "基于扫描电镜原位高温疲劳测试方法研究" . | 电子显微学报 40 . 3 (2021) : 215-220 . |
| APA | 周建力 , 任潇一 , 张宜旭 , 王晋 , 张跃飞 , 张泽 . 基于扫描电镜原位高温疲劳测试方法研究 . | 电子显微学报 , 2021 , 40 (3) , 215-220 . |
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摘要 ：
The effect of deformation temperature on tensile behavior of Inconel 718 alloy has been studied by a self-developed in-situ high-temperature tensile stage inside a scanning electron microscopy at a temperature range from room temperature (RT) to 750 degrees C. The dynamic microstructure evolution and mechanical properties at different temperatures were performed and compared by the uniaxial tensile tests. The in-situ test results showed that the mechanical properties and fracture mechanisms of Inconel 718 alloy were sensitive to deformation temperatures. From RT to 650 degrees C, the yield stress and ultimate tensile strength decrease slightly and the tensile ductility is comparable. While up to 750 degrees C, the yield stress and ultimate tensile strength decrease significantly, the elongation and reduction of cross section also showed a significant decrease from RT to 750 degrees C. It was found that at RT and 650 degrees C, tensile cracks tended to initiate around the carbide particles and the triple junctions of grain boundaries, also propagated transgranularly; at 750 degrees C, the cracks initiated at grain boundaries and propagated intergranularly. In fact, with the increase in deformation temperature, the fracture mechanism transformed from the ductile transgranular fracture to the brittle intergranular fracture.
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| GB/T 7714 | Sang, Lijun , Lu, Junxia , Wang, Jin et al. In-situ SEM study of temperature-dependent tensile behavior of Inconel 718 superalloy [J]. | JOURNAL OF MATERIALS SCIENCE , 2021 , 56 (28) : 16097-16112 . |
| MLA | Sang, Lijun et al. "In-situ SEM study of temperature-dependent tensile behavior of Inconel 718 superalloy" . | JOURNAL OF MATERIALS SCIENCE 56 . 28 (2021) : 16097-16112 . |
| APA | Sang, Lijun , Lu, Junxia , Wang, Jin , Ullah, Rafi , Sun, Xiangcheng , Zhang, Yuefei et al. In-situ SEM study of temperature-dependent tensile behavior of Inconel 718 superalloy . | JOURNAL OF MATERIALS SCIENCE , 2021 , 56 (28) , 16097-16112 . |
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