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Researches on the Growth of Lithium Deposition in Lithium-Ion Batteries During Long-Term Cycling of Slight Overcharging

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Energy technology 2025年

作者： Zhang, Yizhuo Liu, Yihui Wu, Panyun Wang, Yiping Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Centre for Automotive Components Technology Wuhan University of Technology Wuhan430070 China

In the entire life cycle of lithium-ion batteries, there may be long-term cycling of overcharging conditions. Therefore, a high-fidelity model that is analyzed for the physical characteristics of lithium-ion batteries during long-term cycling of overcharging conditions is required. Based on the pseudo-2D (P2D) model, a P2D with a variable solid-phase diffusion coefficient electrochemical model is built. This model is used to study the changes in the physical properties of automotive lithium-ion batteries, including the relative capacity, the generation of lithium metal deposition, and solid electrolyte interface (SEI) film. The SEI film and lithium deposition of lithium-ion batteries have been analyzed under different charge/discharge rates and values of overcharge conditions. It is found that the lithium plating is influenced by both the overcharged value and the charging current rate. Lithium metal deposition has a greater impact on the capacity fading of batteries than the generation of SEI films. There is competition between the generation of SEI films and that of the lithium metal deposition process, and lithium metal deposition inhibits the generation of SEI films. The lithium dendrite and SEI films always grow in parallel coupling. © 2025 Wiley-VCH GmbH.

关键词： Lithium-ion batteries

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Retraction notice to “Testing and impact modeling of lithium-ion prismatic battery under quasi-static and dynamic mechanical abuse” [J. Energy Storage 68 (2023) 107639]

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Journal of Energy Storage 2025年 117卷

作者： Zhen Zou Fengxiang Xu Haodong Tian Xiaoqiang Niu Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China

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Strength-plasticity matching regulation of cold rotary forged Al5A06 sheets by annealing treatment and its influence on fatigue property

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Journal of Materials Science & technology 2024年第25期192卷 123-148页

作者： Xuan Hu Xinghui Han Lin Hua Fang Chai Wuhao Zhuang Fangyan Zheng Fei Yin Xiaokai Wang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070PR China Hubei Longzhong Laboratory Xiangyang 441000PR China

Al5A06 sheets by large cold plastic deformation usually have high strength but low plasticity,*** strength-plasticity matching,which may lead to their poor fatigue *** this study,annealing treat-ments are applied on cold rotary forged Al5A06 sheets to regulate strength-plasticity matching and im-prove fatigue *** microstructures,tensile mechanical properties and fatigue properties un-der different annealing parameters were *** abnormal grain growth mechanism of cold rotary forged Al5A06 sheets during 300℃ annealing treatment was investigated,and the fatigue failure mech-anism of Al5A06 sheets with different annealing temperatures was also *** abnormal grain growth during 300℃ annealing treatment is mainly due to the asynchronous recrystallization behavior with low recrystallization driving force,which leads to the early recrystallized regions directly absorb-ing adjacent grains along134crystal *** cold rotary forged Al5A06 sheets after 250℃-2 h annealing treatment exhibit the best fatigue property,which is mainly because the optimum strength-plasticity matching brings about coordinate plastic deformation throughout most grains,and the effective dislocation movement between adjacent grains can delay the appearance of strain localization and ac-commodate continuous fatigue cyclic loading.

关键词： Al5A06 sheets Cold rotary forging Annealing treatment Strength-plasticity matching Fatigue property

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Microstructure and mechanical properties of friction stir welding joint during post weld heat treatment with different zigzag lines

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Rare Metals 2019年第11期38卷 1070-1077页

作者： Zhi-Li Hu Qiu Pang Ming-Liang Dai Hubei Key Laboratory of Advanced Technology of Automobile Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China School of Mechanical and Electrical Engineering Wuhan Donghu UniversityWuhan 430212China

Zigzag line is a common defect in friction stir welding(FSW) *** formation mechanism of the zigzag line in Al-Cu alloy FSW joint and its influence on the microstructure and mechanical properties during post weld heat treatment(PWHT) were studied by scanning electron microscopy(SEM),microhardness and tensile *** is found that the occurrence of zigzag line for PWHT joint is determined by PWHT process which in nature depends on residual stress and thermal stress of FSW *** optimization of PWHT process to reduce the residual and thermal stress can trigger for the deterioration of mechanical properties of PWHT joints with zigzag *** obvious decrease of tensile properties is observed for T6-450 and T6-495 joints although zigzag line appears in the *** determines the sizes of zigzag line cracks and consequently determines the fracture location and characteristics of FSW joint.

关键词： Friction stir welding Post weld heat treatment Zigzag line Mechanical properties

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Mechanisms of crack elimination in directed energy deposited MAR M247 superalloy and effects of laser power on microstructural evolution and mechanical properties

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Materials Today Communications 2025年 46卷

作者： Mingzhang Chen Xunchen Liu Yitong Wang Lin Hua Zeqi Hu School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan 430070 China

MAR M247 is a directionally solidified nickel-based superalloy with excellent high-temperature performance, but it suffers from severe cracking issues during the directed energy deposition (DED) process. Currently, much of the research on crack suppression in nickel-based superalloy has focused on IN738 and Hastelloy X, with limited studies specifically addressing the cracking suppression mechanisms for M247. This study investigates the mechanisms of crack elimination in M247 and the influence of laser power on its microstructural evolution and mechanical properties. Thermodynamic calculations indicate that M247 has higher crack sensitivity indices than IN718 and IN738, making crack suppression a critical challenge. By optimizing DED process parameters, particularly by reducing scan speed and increasing laser power, cracks were effectively eliminated. Numerical simulations reveal that these adjustments reduce thermal stress accumulation, thereby mitigating cracking. Microstructural characterization shows that increasing laser power minimizes internal defects, promotes a trend toward oriented grain growth, decreases transverse grain boundaries perpendicular to the deposition direction, reduces disorientation, promotes texture evolution, and increases Schmid factors. While tensile strength and microhardness remain largely unaffected, ductility is significantly improved. This paper provides valuable insights into crack elimination and mechanical property enhancement in additive manufactured nickel-based superalloy.

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Failure Mechanisms and Structural Optimization of Shredder Hammer for Metal Scraps

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Chinese Journal of Mechanical Engineering 2016年第4期29卷 792-801页

作者： ZHOU Xianyan HU Zhili TAO Yijun QIN Xunpeng HUA Lin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Lidi Machine Tool Company Limited Yichang 443000 China

Recycling retired cars can relieve the environmental pollution and resource waste ***,a few publications can be found on the failure mechanisms and optimization method of recycling equipment,***,the failure mechanisms and structural optimization of shredder hammers for retired cars are studied aiming improving shredding efficiency and reducing *** types of shredder hammer are studied theoretically,and it is found that wear failure and fatigue failure are the two main failure types of shredder *** shredding process of metal scraps is analyzed by finite element method,and it can be divided into four stages based on the stress states：initial stage,collision stage,grinding stage and separation *** is proved that the shredding efficiency can be improved by increasing cutouts on the hammer ***,it is determined that the hammer with two cutouts is the optimal structure for metal scraps,which can improve the shredding efficiency by 20% and lengthen the hammer life by 15%.This study provides scientific basis for the industry application and theoretical foundation for further research.

关键词： Metal scraps recycling impacts grinding structural optimization

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Microstructural evolution of GCr15 steel during austenitizing and quenching considering C and Cr content

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Journal of Central South University 2016年第10期23卷 2492-2499页

作者：刘青龙钱东升魏文婷 School of Materials Science and Engineering Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology

Microstructural evolution of GCr15 steels with different C and Cr contents during austenitizing and quenching was studied. Thermodynamic analysis of cementite dissolution was implied to obtain the critical temperature. The coordination number x in Fe_xCr_(3-x)C and the volume fraction of undissolved cementite were computed according to element conservation and equilibrium phase diagram. The M_S(martensite transformation temperature) was calculated by using empirical formula. The retained austenite content was calculated with further consideration of quenching temperature. The results showed that the coordination number and the undissolved cementite content were promoted by the austenitizing temperature and carbon content of the steel. Increasing Cr element reduced the coordination ***15 steels with different components had nearly the same M_S when austenitization at 830 °C to 860 °C. The interaction of C and Cr complicated the evolution of M_S and retained austenite content. The results were in good agreement with the literature, which could guide to obtain specified retained austenite and/or carbides.

关键词： GCr15 steel austenitization quenching thermodynamic calculation kinetics

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Effect of key factors on cold orbital forging of a spur bevel gear

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Journal of Central South University 2016年第2期23卷 277-285页

作者：庄武豪董丽颖 School of Materials Science and Engineering Wuhan University of Technology School of Automotive Engineering Hubei Key Laboratory of Advanced Technology for Automotive ComponentsWuhan University of Technology

Cold orbital forging is an advanced spur bevel gear forming technology. Generally, the spur bevel gear in the cold orbital forging process is formed by two steps: the preforming step and the final step. Due to the great importance of the final step to gear forming and its complication with interactive factors, this work aims at examining the influence of key factors on the final step in cold orbital forging of a spur bevel gear. Using the finite element(FE) method and control variate method, the influence rules of four key factors, rotation velocity of the upper tool, n, feeding velocity of the lower tool, v, tilted angle of the upper tool, γ, friction factor between the tools and the billet, m, on the geometry and the deformation inhomogeneity of the cold orbital forged gear are thoroughly clarified. The research results show that the flash becomes more homogeneous with increasing v, increasing m, decreasing n or decreasing γ. And the deformation of the gear becomes more homogeneous with increasing v, decreasing n or decreasing γ. Finally, a corresponding experiment is conducted, which verifies the accuracy of FE simulation conclusions.

关键词： cold orbital forging FE modeling key factors spur bevel gears

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Effect of Prior Cold Deformation on the Stability of Retained Austenite in GCr15 Bearing Steel

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Acta Metallurgica Sinica(English Letters) 2019年第1期32卷 107-115页

作者： Feng Wang Dong-Sheng Qian Xiao-Hui Lu School of Materials Science and Engineering Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology

In this work, the effect of prior cold deformation on the stability of retained austenite in GCr15 bearing steel was investigated after quenching and tempering treatment. The thermal stability was evaluated by calculating thermal activation energy for decomposition of retained austenite using differential scanning calorimeter. The mechanical stability was investigated according to the strain-induced martensitic transformation behavior of retained austenite under the standard compression testing. It is found that the prior cold deformation not only accelerates the carbide dissolution during the austenitization process but also contributes to the carbon partitioning in the tempering stage due to the higher density of phase boundaries, which results in the improvement of the thermal stability of retained austenite. Due to the enhanced carbide dissolution, the higher carbon content in the prior austenite will intensify the isotropic strain of martensitic transformation. As a consequence, the film-like retained austenite is likely to form under a higher hydrostatic pressure and thus shows a higher mechanical stability. Additionally, it is noteworthy that the benefits of the prior cold deformation to the stability of retained austenite would be saturated when the cold deformation degree is larger than 40%.

关键词： GCr15 bearing steel Prior cold deformation Retained austenite stability

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Low-cost biodegradable lead sequestration film for perovskite solar cells

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Journal of Energy Chemistry 2023年第9期84卷 311-320页

作者： Yiming Xiong Haoyu Cai Wang Yue Wenjian Shen Xuehao Zhu Juan Zhao Fuzhi Huang Yi-Bing Cheng Jie Zhong State Key Laboratory of Advanced Technology of Materials Composite Technology Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216GuangdongChina School of Automobile Engineering Wuhan University of TechnologyWuhan 430070HubeiChina

Despite the high efficiency that has been achieved for the perovskite solar cells(PSCs),the hazardous lead leakage from the perovskite absorber layer is one of the crucial barriers still hindering its penetration into the commercial market for a large-scale ***,we report a novel low-cost and biodegradable lead sequestration layer with high compatibility for up-scalable encapsulation of *** a precisely designed cross-linking reaction of chemical agents,the as-made biodegradable chitosan composite film shows enhanced mechanical strength,chemical stability,and lead adsorption *** designed encapsulation strategy reduces over 99.99% lead leakage to <2 ppb under varied simulations of weather conditions(hail,rain,or flood),which meet the safe level of drinking water set by the US Environmental Protection Agency(EPA).Moreover,the PSC efficiency is improved from 21.91% to22.82% due to the improved light absorption from the printed biodegradable lead absorption ***,we present a prototype process of accumulation and recycling of lead compounds in PSCs derbies via the biodegradation *** on the low-cost biodegradable lead sequestration film,this environmental-friendly encapsulation strategy could address the lead leakage issue for further commercialization of PSCs.

关键词： Lead sequestration Cross-linking Perovskite solar cells Biodegradable Recycling

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