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学者姓名：黄婷
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Abstract ：
Silicon-based anodes, utilizing nanosized silicon materials, hold great promise for the next-generation of lithium-ion batteries due to their high capacity and stable expansion. This study aims to address challenges in traditional slurry-coated anodes, such as agglomeration and low adhesive strength, through the application of laser powder bed fusion (LPBF). The process involves fabricating an Al-Si-Cu alloy layer on a Cu foil current collector, followed by dealloying to create a porous Si-Cu anode. Simulated and experimental results demonstrate successful alloy layer formation through optimized laser spot (55 mu m) and powder sizes (1-5 mu m). Controlled cooling produces primary Si particles ranging from 150 nm to 1 mu m. The resulting microstructure enhances electrochemical performance, particularly by tailoring the size of primary Si. The resultant porous Si-Cu anode, featuring uniformly distributed primary Si (200 nm) metallurgically bonded with Cu networks, exhibits an initial coulombic efficiency of 83% and a remarkable capacity retention of 80% after 300 cycles at 2 C. In-situ and ex-situ observations confirm the crucial role of anode architecture in performance enhancement. This study elucidates the influence of the LPBF microstructure on anode performance and broadens the potential application of laser powder bed fusion in battery manufacturing. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
Dealloying Dealloying Primary Si Primary Si Microstructure Microstructure LPBF LPBF LIBs LIBs
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| GB/T 7714 | Cao, Li , Zheng, Min , Dong, Guochen et al. Tailoring nanoscale primary silicon in laser powder b e d fusion for high-performance lithium-ion battery anodes [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 211 : 278-287 . |
| MLA | Cao, Li et al. "Tailoring nanoscale primary silicon in laser powder b e d fusion for high-performance lithium-ion battery anodes" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 211 (2024) : 278-287 . |
| APA | Cao, Li , Zheng, Min , Dong, Guochen , Xu, Jiejie , Xiao, Rongshi , Huang, Ting . Tailoring nanoscale primary silicon in laser powder b e d fusion for high-performance lithium-ion battery anodes . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 211 , 278-287 . |
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Abstract ：
本发明提供了一种柔性湿度传感器超短脉冲激光直写方法，包括以下步骤：S1：制备金属盐墨水，金属盐墨水包括金属盐、还原剂和去离子水；S2：提供柔性基底，将所述金属盐墨水覆盖在柔性基底表面，将超短脉冲激光聚焦在柔性基底和金属盐墨水形成的界面；通过第一工艺参数的激光直写在柔性基底表面的特定位置实现金属离子的还原沉积生成金属，从而形成导电电极；通过第二工艺参数的激光直写在柔性基底表面的特定位置实现金属离子的还原沉积生成金属氧化物，从而形成传感电极；S3：清洗激光作用后的柔性基底表面，得到导电电极和传感电极均集成在柔性基底表面的湿度传感器。本发明制备效率高，能够实现传感器结构的设计与制造，以及电极材料的调控。
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| GB/T 7714 | 黄婷 , 邢羚榕 , 肖荣诗 et al. 一种柔性湿度传感器超短脉冲激光直写方法 : CN202310295247.X[P]. | 2023-03-23 . |
| MLA | 黄婷 et al. "一种柔性湿度传感器超短脉冲激光直写方法" : CN202310295247.X. | 2023-03-23 . |
| APA | 黄婷 , 邢羚榕 , 肖荣诗 , 崔梦雅 . 一种柔性湿度传感器超短脉冲激光直写方法 : CN202310295247.X. | 2023-03-23 . |
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Abstract ：
Laser micro-welding differs from macro-welding in that at least one dimension of the weld is less than 100 mu m. Although process research on laser micro-welding has recently made some progress, the influence of welding mode on microstructure and corrosion resistance has remained unknown, which has been shown to have a significant influence on laser macro-welding. In this work, a single-mode fiber laser equipped with a scanning galvanometer is used to weld AISI304 stainless steel foils with a thickness of 100 mu m. Similar to laser macro -welding, keyhole formation is used to describe two welding modes, namely thermal conduction welding and penetration welding. The laser-material interaction experiences a transient phase in which the welding mode alternates between conduction welding and penetration welding as reported by previous work. However, we show that gas protection eliminates the transient phase, proving that the transient phase develops as a result of the unsteadiness of the penetration welding caused by oxidation during the welding process. The crystallographic texture and phase constitution vary between conduction and penetration welds due to variations in heat transfer behavior during welding. The conduction weld has greater sigma 3 CSL boundaries and a more uniform micro-structure than the penetration weld, resulting in better corrosion resistance.
Keyword ：
Welding mode Welding mode Laser micro-welding Laser micro-welding Corrosion resistance Corrosion resistance Microstructure Microstructure
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| GB/T 7714 | Du, Weizhe , Xu, Jiejie , Xiao, Rongshi et al. Laser micro-welding of stainless steel foil: Welding mode, microstructure and corrosion properties [J]. | OPTICS AND LASER TECHNOLOGY , 2023 , 161 . |
| MLA | Du, Weizhe et al. "Laser micro-welding of stainless steel foil: Welding mode, microstructure and corrosion properties" . | OPTICS AND LASER TECHNOLOGY 161 (2023) . |
| APA | Du, Weizhe , Xu, Jiejie , Xiao, Rongshi , Huang, Ting . Laser micro-welding of stainless steel foil: Welding mode, microstructure and corrosion properties . | OPTICS AND LASER TECHNOLOGY , 2023 , 161 . |
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Abstract ：
Nanosilicon (nano-Si) anode is subjected to significant stress concentration, which is caused by extrusion deformation of expanded Si nanoparticles with uneven distribution. The low-strength binder and adhesive interface are unable to withstand the stress, resulting in exfoliation and impeding the use of nano-Si anodes. This work aims to mitigate stress in a Si anode with flexible copper (Cu) skeletons that are metallurgically bonded to uniformly distributed Si nanoparticles. It is worth noting that the proposed porous Si-Cu anode exhibits improved high-load cycling performance and promising potential in the full cell, with an energy density of 463 Wh kg-1 at 0.5 C and retention of 81% after 500 cycles at 2 C. Chemo-mechanical simulation and in (ex) situ observation demonstrate that expansion stress is reduced and more evenly distributed in the anode due to uniform distribution of Si nanoparticles, flexible Cu skeletons, and adequate pores. More importantly, the stress is primarily distributed in the flexible Cu skeletons and bonding interface, preventing anode exfoliation, and ensuring efficient lithium ion/electron transference. This work sheds light on the structure construction of an alloy-type anode. The expansion-induced stress concentration in a Si anode is successfully mitigated by constructing a porous structure out of a flexible Cu network that is metallurgically bonded to uniformly dispersed Si nanoparticles. Chemo-mechanical simulation and in (ex)-situ observation of structural evolution show how the high-strength flexible metallic network and metallurgical bonding interface affect the stress.image
Keyword ：
bonding interface bonding interface uniform distribution uniform distribution nano-Si nano-Si stress stress flexible skeleton flexible skeleton
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| GB/T 7714 | Cao, Li , Zheng, Min , Dong, Guochen et al. Stress Mitigation of Nanosilicon Anode to Achieve Energy-Dense and Highly-Stable Full Cell [J]. | SMALL , 2023 , 20 (3) . |
| MLA | Cao, Li et al. "Stress Mitigation of Nanosilicon Anode to Achieve Energy-Dense and Highly-Stable Full Cell" . | SMALL 20 . 3 (2023) . |
| APA | Cao, Li , Zheng, Min , Dong, Guochen , Xu, Jiejie , Xiao, Rongshi , Huang, Ting . Stress Mitigation of Nanosilicon Anode to Achieve Energy-Dense and Highly-Stable Full Cell . | SMALL , 2023 , 20 (3) . |
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Abstract ：
本发明提供了一种超快激光真空制孔方法，该方法将待加工板材置于真空环境下，利用超快激光进行旋转环切制孔，激光束以旋转方式运动形成切环，直至切环在板材表面形成圆孔。真空环境可以避免超快激光与材料相互作用过程中产生等离子体，提高激光能量利用率；激光束以旋转的方式运动可以有效改善光斑能量分布不均匀和扩大激光去除区域面积，提高制孔精度并增大孔深；环切制孔可以有效提高制孔效率。
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| GB/T 7714 | 黄婷 , 蒋麒 , 张海洲 et al. 一种超快激光真空制孔方法 : CN202211228152.8[P]. | 2022-10-09 . |
| MLA | 黄婷 et al. "一种超快激光真空制孔方法" : CN202211228152.8. | 2022-10-09 . |
| APA | 黄婷 , 蒋麒 , 张海洲 , 蔺晓超 , 郭鹏 , 邱文旺 et al. 一种超快激光真空制孔方法 : CN202211228152.8. | 2022-10-09 . |
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Abstract ：
本发明提供了一种铜表面双光束送丝式激光熔覆方法，包括如下步骤：在铜基体表面制备吸收层，以促进所述铜基体对激光能量的吸收；将第一激光束作用于丝材上，在所述丝材的端部诱导产生蒸发前沿，并以深熔模式吸收激光能量加热熔化所述丝材，所述丝材熔化形成金属液滴过渡到所述铜基体表面形成熔池，随着所述第一激光束移动熔池凝固形成连续的熔覆层；将第二激光束作用于铜基体表面，由此所述吸收层能够吸收所述第二激光束能量，以热导模式对所述铜基体进行局部预热。本发明可以显著提高材料的沉积效率，还可以有效地避免熔合不良、浸润性差、裂纹、气孔等缺陷的形成。
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| GB/T 7714 | 黄婷 , 罗鹏 , 肖荣诗 . 一种铜表面双光束送丝式激光熔覆方法 : CN202210380699.3[P]. | 2022-04-12 . |
| MLA | 黄婷 et al. "一种铜表面双光束送丝式激光熔覆方法" : CN202210380699.3. | 2022-04-12 . |
| APA | 黄婷 , 罗鹏 , 肖荣诗 . 一种铜表面双光束送丝式激光熔覆方法 : CN202210380699.3. | 2022-04-12 . |
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Abstract ：
本发明提供了一种动态聚焦超快激光切割方法，该方法利用超快激光进行加工，激光束先经过透镜组件实现准直和动态扩束，再经过聚焦镜实现激光聚焦平面沿光束传播方向的上下移动，同时，激光沿预定切割线扫描，并采用与聚焦光束同轴的高压辅助气体吹除激光作用区域等离子体，最终实现被加工材料的切割。本发明利用超快激光进行切割，热影响小、加工精度高；采用动态聚焦策略解决切割截面锥角过大问题，提高加工质量；激光束沿预定切割线移动方向的后侧切缝完全切穿，高压辅助气体由切缝处吹除等离子体，提高激光能量利用率和切割效率。
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| GB/T 7714 | 黄婷 , 黄彩丽 , 张海洲 et al. 一种动态聚焦超快激光切割方法 : CN202211228137.3[P]. | 2022-10-09 . |
| MLA | 黄婷 et al. "一种动态聚焦超快激光切割方法" : CN202211228137.3. | 2022-10-09 . |
| APA | 黄婷 , 黄彩丽 , 张海洲 , 蔺晓超 , 杨诗瑞 , 邱文旺 et al. 一种动态聚焦超快激光切割方法 : CN202211228137.3. | 2022-10-09 . |
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Abstract ：
本申请涉及激光振镜技术领域，提供一种激光扫描振镜系统。激光扫描振镜系统，包括平面反射振镜和曲面反射振镜；所述平面反射振镜，用于将激光束反射到曲面反射振镜；所述曲面反射振镜，用于对激光束进行聚焦并将激光束反射到工作面。根据本申请实施例的激光扫描振镜系统，实现了通过曲面反射振镜对激光束进行聚焦并将激光束反射到工作面上，无需提前对激光束进行动态聚焦，减少了使用的光学结构数量，装配简单，避免装配时出现较大的机械误差。
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| GB/T 7714 | 苏坤 , 杜伟哲 , 黄婷 et al. 激光扫描振镜系统 : CN202210657696.X[P]. | 2022-06-10 . |
| MLA | 苏坤 et al. "激光扫描振镜系统" : CN202210657696.X. | 2022-06-10 . |
| APA | 苏坤 , 杜伟哲 , 黄婷 , 肖荣诗 . 激光扫描振镜系统 : CN202210657696.X. | 2022-06-10 . |
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Abstract ：
本发明提供了一种模拟复合材料与金属激光连接温度场的方法，属于激光先进制造领域。针对复合材料与金属材料激光连接的过程，建立了一个连续纤维增强树脂基复合材料与金属激光连接的有限元三维模型，复合材料部分根据实际样品进行分层处理，并且根据纤维预浸带的铺层方式和方向设置材料物理属性为各向异性，能够准确预测复合材料与金属材料异质结构接头激光连接过程中的温度场分布。本发明具有较高的普适性，能够准确反映连续纤维对复合材料与金属激光连接过程中温度场的影响，通过计算连续纤维增强树脂基复合材料与金属激光连接接头的温度场，预测激光连接工艺窗口，为实际工程和科学研究起到预测和指导作用。
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| GB/T 7714 | 肖荣诗 , 景若木 , 黄婷 . 一种模拟复合材料与金属激光连接温度场的方法 : CN202210423118.X[P]. | 2022-04-21 . |
| MLA | 肖荣诗 et al. "一种模拟复合材料与金属激光连接温度场的方法" : CN202210423118.X. | 2022-04-21 . |
| APA | 肖荣诗 , 景若木 , 黄婷 . 一种模拟复合材料与金属激光连接温度场的方法 : CN202210423118.X. | 2022-04-21 . |
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Abstract ：
本发明涉及激光焊接技术领域，提供一种喷嘴及振镜激光焊接气体保护装置，喷嘴包括进气管和喷嘴本体，所述喷嘴本体的第一侧设有进气口，所述进气口与所述进气管连接，所述喷嘴本体的第二侧设有出气口；所述喷嘴本体的内部构造有气流转化区域，所述气流转化区域适于将从所述进气口进入喷嘴本体内部的气体由紊流转化为层流，并从所述出气口排出。本发明提供的喷嘴，能够实现保护气体的稳定喷射，进而有效改善焊接质量。本申请提供的振镜激光焊接气体保护装置，能够与振镜的控制系统协同控制，从而自动定位工件位置并实施气体保护。
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| GB/T 7714 | 杜伟哲 , 苏坤 , 黄婷 et al. 喷嘴及振镜激光焊接气体保护装置 : CN202210663911.7[P]. | 2022-06-10 . |
| MLA | 杜伟哲 et al. "喷嘴及振镜激光焊接气体保护装置" : CN202210663911.7. | 2022-06-10 . |
| APA | 杜伟哲 , 苏坤 , 黄婷 , 肖荣诗 . 喷嘴及振镜激光焊接气体保护装置 : CN202210663911.7. | 2022-06-10 . |
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