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An overview of electrochemical,non-electrochemical and analytical approaches for studying corrosion in magnesium and its alloys
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作者 Arash Fattah-Alhosseini Minoo Karbasi +2 位作者 Razieh Chaharmahali Abdelhameed Fardosi Mosab Kaseem 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第9期3516-3542,共27页
Corrosion is a pervasive phenomenon affecting materials across a multitude of scales,from the atomic to the macroscopic.This review paper presents a comprehensive examination of the methodologies employed in the analy... Corrosion is a pervasive phenomenon affecting materials across a multitude of scales,from the atomic to the macroscopic.This review paper presents a comprehensive examination of the methodologies employed in the analysis of magnesium corrosion,including electrochemical,non-electrochemical and analytical approaches,emphasizing the need for a diverse array of analytical tools to understand the complex interplay between corrosion,microstructure,and the dissolution mechanisms of magnesium alloys.The research showcases the utility of specific tools like SEM/EDS and SKPFM for targeted site analysis,while XPS and FTIR provide a broader perspective on specimen surfaces.The paper also discusses the value of in-situ analysis techniques,which allow for the real-time observation of corrosion processes,offering a dynamic view of the emergence and evolution of corrosion products.These in-situ methods stand in contrast to ex-situ analyses,which only permit post-experimental evaluation.By highlighting the capabilities of various analytical tools,from those that reveal surface layer details to those that probe deeper structures,and from those that detect primary elements to those that trace minute quantities of impurities,this study underscores the intricate nature of corrosion and the critical role of advanced analytical techniques in fostering a deeper understanding of material degradation.The findings advocate for the increased application of in-situ analysis in magnesium corrosion research,as it provides a more immediate and accurate depiction of corrosion dynamics,potentially leading to more effective corrosion prevention and control strategies. 展开更多
关键词 Mg and its alloy electrochemical test Non-electrochemical test Analytical technique Corrosion behavior
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In-situ investigation of atmospheric corrosion behavior of bronze under thin electrolyte layers using electrochemical technique 被引量:6
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作者 廖晓宁 曹发和 +3 位作者 陈安娜 刘文娟 张鉴清 曹楚南 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第5期1239-1249,共11页
The atmospheric corrosion behavior of bronze under thin electrolyte layer (TEL) with different thicknesses was monitored using cathodic polarization curves, open circuit potential (OCP) and electrochemical impedan... The atmospheric corrosion behavior of bronze under thin electrolyte layer (TEL) with different thicknesses was monitored using cathodic polarization curves, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS). Cathodic polarization result indicates that the cathodic limiting current density increases with decreasing the TEL thickness. EIS result shows that the corrosion rate increases with decreasing the TEL thickness at the initial stage because the corrosion is dominated by the cathodic process, whereas after long immersion time, the corrosion degree with the TEL thickness is in the sequence of 150 μm 〉 310 μm〉 10μm ≈ bulk solution 〉 57 μm. The measurements of OCP and EIS present in-situ electrochemical corrosion information and their results are in good agreement with that of physical characterizations. 展开更多
关键词 BRONZE thin electrolyte layer in-situ investigation atmospheric corrosion electrochemical technique
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Corrosion Measurements of Reinforcing Steel by Different Electrochemical Techniques 被引量:1
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作者 S.M.Morsy (Metallurgy Dept. Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt) I.Z.Selim (Physical Chemistry Dept., National Research Center, Dokki, Cairo, Egypt)S. H. Tantawi (Building Research Institute, Dokki, Cairo, Egypt) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1995年第6期447-451,共5页
Electrochemical techniques of the corrosion measurements of reinforcing steeI in concrete have been evaluated. These techniques include half-cell potential measurements, impressed voltage method, impressed current met... Electrochemical techniques of the corrosion measurements of reinforcing steeI in concrete have been evaluated. These techniques include half-cell potential measurements, impressed voltage method, impressed current method and potentiostatic polarization technique. The results of corrosion behaviour of the steel in both 5%NaCl and 5%MgSO4 show that each electrochemical technique provides some information about the condition of the steel bar or the corrosivity of the environment being evaluated, yet none provides a complete data regarding the corrosion resistance of reinforcing steel in aggressive media 展开更多
关键词 Corrosion Measurements of Reinforcing Steel by Different electrochemical techniques
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Measurement of Concentration Distribution of Electrogenerated Etchant Using an Electrochemical Probe Technique
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作者 Lian Yong SU Jin LUO +1 位作者 Zhong Hua LIN Zhao Wu TIAN(National Lab of Molecular and Biomolecular Electronics,Southeast University,Nanjing 210018)(State Key Lab for Physical Chemistry of Solid Surfaces,Department of Chemistry,Xiamen University 361005) 《Chinese Chemical Letters》 SCIE CAS CSCD 1996年第9期835-836,共2页
An electrochemical probe measurement system for detecting an electrogenerated etchant in solution is developed.Concentration distribution of electrogenerated etchant bromine as close as 8 micrometer to the surface of ... An electrochemical probe measurement system for detecting an electrogenerated etchant in solution is developed.Concentration distribution of electrogenerated etchant bromine as close as 8 micrometer to the surface of macrodisk is studied quantitatively. 展开更多
关键词 MEASUREMENT electrochemical PROBE technique CONCENTRATION DISTRIBUTION
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Study of Corrosion Resistance of Laser Welded Au-Pd-Ag-In Alloy Using Electrochemical Techniques
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作者 Márcio L. Dos Santos Heloísa A. Acciari +1 位作者 Carla S. Riccardi Antonio C. Guastaldi 《Materials Sciences and Applications》 2011年第7期711-715,共5页
The aim of this work was to evaluate the corrosion resistance of AuPdAgIn alloy, submitted to laser beam welding, in 0.9% NaCl solution, using electrochemical techniques. Measures of the open circuit potential (OCP) v... The aim of this work was to evaluate the corrosion resistance of AuPdAgIn alloy, submitted to laser beam welding, in 0.9% NaCl solution, using electrochemical techniques. Measures of the open circuit potential (OCP) versus time were applied to electrochemical experiments, as well as potentiodynamic direct scanning (PDS) and electrochemical impedance spectroscopy (EIS) on AuPdAgIn alloy, submitted to laser beam welding in 0.9% NaCl solution. Some differences observed in the microstructure can explain the results obtained for corrosion potential, Ecorr, and corrosion resistance, Rp. EIS spectra have been characterized by distorted capacitive components, presenting linear impedance at low frequencies, including a non-uniform diffusion. The area of the laser weld presented corrosion potential slightly superior when compared to the one of the base metal. The impedance results suggest the best resistant corrosion behavior for laser weld than base metal region. This welding process is a promising alternative to dental prostheses casting. 展开更多
关键词 LASER Welding Corrosion Au-Pd-Ag-In electrochemical techniques
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Insight into the Electrochemical Behaviors of NCM811|SiO-Gr Pouch Battery through Thickness Variation
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作者 Xingqin Wang Youzhi Song +5 位作者 Hao Cui Jianhong Liu Hua Huo Li Wang Yunzhi Gao Xiangming He 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第5期211-218,共8页
LiNi0.8Co0.1Mn0.1O2(NCM811)|SiOx-graphite(SiO-Gr.)battery chemistry is of intensive attention because its achievable practical energy density is approaching impressively 300 Wh Kg^(-1).However,it still suffers rapid c... LiNi0.8Co0.1Mn0.1O2(NCM811)|SiOx-graphite(SiO-Gr.)battery chemistry is of intensive attention because its achievable practical energy density is approaching impressively 300 Wh Kg^(-1).However,it still suffers rapid capacity fades during repeated cycles,both chemical,electrochemical and mechanical irreversibility contribute.A comprehensive understanding behind the fading behavior of the cell chemistry is required before fully realize the benefits of this chemistry.Herein,the in-situ thickness variation is introduced as a diagnostic technique and is performed on 5-55 Ah NCM811|SiO-Gr cells.With the help of Li reference electrode and in-situ X-ray diffraction device,the correspondence between thickness variation and the electrode potential is carefully investigated.Firstly,the NCM811|SiO-Gr cell is characterized with the maximum cell thickness at around 80%state-of-charge(SOC)in the discharge process,rather than at 100%SOC.Secondly,the electrochemical behaviors during rate charge/discharge are diagnosed,and a Li platting signal is resolved from thickness variation profile at 2C.This work confirms that the thickness monitoring is a nondestructive and informative complement to conventional diagnostic techniques for failure analysis of pouch cells. 展开更多
关键词 diagnostic technique electrochemical behavior NCM811 cathode Si-containing anode thickness variation
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Nanometeric hydroxyapatite in situ formed in demineralized bone matrix by electrochemical technique
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《Chinese Journal of Biomedical Engineering(English Edition)》 2001年第3期130-132,共3页
关键词 BONE Nanometeric hydroxyapatite in situ formed in demineralized bone matrix by electrochemical technique DBM
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电催化硝酸根还原制氨 被引量:1
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作者 于一夫 周瑾 《大学化学》 CAS 2024年第1期273-279,共7页
在创新教育背景下,以硝酸根电催化还原制氨为反应案例,将科研成果融入到实验教学中。基于学生已掌握的实验技能和基础电化学知识,利用电化学测量技术、核磁共振波谱法、紫外分光光度法等探究催化剂电催化硝酸根还原制氨的性能。通过具... 在创新教育背景下,以硝酸根电催化还原制氨为反应案例,将科研成果融入到实验教学中。基于学生已掌握的实验技能和基础电化学知识,利用电化学测量技术、核磁共振波谱法、紫外分光光度法等探究催化剂电催化硝酸根还原制氨的性能。通过具体的实验操作,让学生进一步认识电催化的基本原理,掌握基础的电化学测量技术,激发学生对电化学合成的兴趣。本教学实验内容丰富,涉及多学科知识,满足多学科交叉融合发展需求,有利于学生创新发散思维的培养,符合新时代学科教育要求。 展开更多
关键词 电催化 硝酸根还原 电化学测量技术
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添加CeO_(2)对激光熔覆Ni基/WC复合涂层的影响
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作者 梁飞龙 李凯玥 +2 位作者 师文庆 朱志凯 何启浪 《激光技术》 CAS CSCD 北大核心 2024年第4期542-548,共7页
为了提高Q235钢材在海水中的耐腐蚀性能,扩大其应用场合,使其能够服役于富含Cl离子的海洋环境,采用激光熔覆技术,在Q235钢表面制备出添加不同质量分数CeO_(2)改性的Ni基/WC复合熔覆层,并利用扫描电镜、能谱仪和电化学工作站等仪器对熔... 为了提高Q235钢材在海水中的耐腐蚀性能,扩大其应用场合,使其能够服役于富含Cl离子的海洋环境,采用激光熔覆技术,在Q235钢表面制备出添加不同质量分数CeO_(2)改性的Ni基/WC复合熔覆层,并利用扫描电镜、能谱仪和电化学工作站等仪器对熔覆层的组织与性能进行了测试。结果表明,适量CeO_(2)的加入可以促进晶粒细化与组织的均匀分布,提高熔覆层在NaCl溶液(质量分数为3.5%)中的耐腐蚀性能;当添加的CeO_(2)质量分数达到1%时,熔覆层具有最高的平均硬度与最好的耐海水腐蚀性能;过高的CeO_(2)含量则会加剧电偶腐蚀效应,降低其耐腐蚀性能。该研究为后续在Q235钢材表面制备耐腐蚀的激光熔覆合金涂层、改善合金材料表面性能提供了理论参考依据。 展开更多
关键词 激光技术 复合涂层 激光熔覆 氧化铈 电化学腐蚀
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电化学强化水污染治理中羧甲基纤维素应用的研究进展
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作者 董跃 喻纪猛 +4 位作者 隋明锐 蒋奕颖 吴佳欣 杨雨茗 李一平 《水资源保护》 EI CAS CSCD 北大核心 2024年第5期148-157,共10页
综述了电化学强化技术(EST)作为以微生物为催化剂进行水污染治理和能源回收的环境友好型水处理技术的研究进展;分析了羧甲基纤维素(CMC)利用丰富的羟基、羧基、羧甲基等基团与碳基、金属/金属氧化物等多种材料复合应用于EST中净水的可行... 综述了电化学强化技术(EST)作为以微生物为催化剂进行水污染治理和能源回收的环境友好型水处理技术的研究进展;分析了羧甲基纤维素(CMC)利用丰富的羟基、羧基、羧甲基等基团与碳基、金属/金属氧化物等多种材料复合应用于EST中净水的可行性,发现CMC材料有利于提高EST的能量产率和稳定性;深入讨论了CMC材料在EST中进行污水治理的多种应用,包括作为黏结剂、分散剂、吸附剂等形式。未来应该重点从机理、方法、技术和应用4个角度对基于CMC材料的EST在水污染治理领域的应用进行研究。 展开更多
关键词 水污染治理 水处理技术 电化学强化技术 羧甲基纤维素
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动态人工模拟海水环境下两种B10铜镍合金腐蚀行为
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作者 苏英 管勇 《材料工程》 EI CAS CSCD 北大核心 2024年第6期201-210,共10页
采用动电位极化曲线和电化学阻抗谱测试并结合XPS测试和SEM/EDS微观表征,通过自制的冲刷腐蚀实验装置研究了两种B10铜镍合金在不同流速和不同时间下的冲刷腐蚀行为,比较了两种铜镍合金在不同冲刷条件下的腐蚀差异。结果表明,两种铜镍合... 采用动电位极化曲线和电化学阻抗谱测试并结合XPS测试和SEM/EDS微观表征,通过自制的冲刷腐蚀实验装置研究了两种B10铜镍合金在不同流速和不同时间下的冲刷腐蚀行为,比较了两种铜镍合金在不同冲刷条件下的腐蚀差异。结果表明,两种铜镍合金的腐蚀速率随时间的变化规律相似,在不同的流速下冲刷2 h后腐蚀速率较高,冲刷8 h后腐蚀速率较低。在低于4 m/s的流速冲刷不同时间后,A合金的耐蚀性整体上高于B合金的耐蚀性;当流速高于3 m/s且较长时间冲刷后,B合金的耐蚀性更好。这与钝化膜中Ni,Fe的化学态无关而与晶粒尺寸和孪晶数量以及Ni,Fe元素的富集有关。长时间高流速冲刷会促进钝化膜中Ni和Fe元素的富集,有利于增强钝化膜的耐蚀性。 展开更多
关键词 B10铜镍合金 电化学技术 冲刷腐蚀 钝化膜 腐蚀形貌
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Au/MXene/ZIF-8电化学传感器用于抗坏血酸的检测
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作者 王丽萍 初红涛 李军 《齐齐哈尔大学学报(自然科学版)》 2024年第5期52-56,共5页
通过原位生长法与电沉积方法制备Au/MXene/ZIF-8修饰的玻碳电极(Au/MXene/ZIF-8/GCE),用于测量血浆实际样品中的抗坏血酸水平,基于循环伏安法和差分脉冲伏安法测量电化学性能。研究表明,该传感器的线性响应范围为0.1~8.0mmol/L,灵敏度为... 通过原位生长法与电沉积方法制备Au/MXene/ZIF-8修饰的玻碳电极(Au/MXene/ZIF-8/GCE),用于测量血浆实际样品中的抗坏血酸水平,基于循环伏安法和差分脉冲伏安法测量电化学性能。研究表明,该传感器的线性响应范围为0.1~8.0mmol/L,灵敏度为4.83μA/μmol·L^(-1),检出限为2.45μmol/L,回收率为95.8%~106.7%,相对标准偏差(RSD,n=3)小于5%。该传感器检测限低、灵敏度高,有望将此方法用于血浆中抗坏血酸的检测。 展开更多
关键词 MXene材料 ZIF-8 抗坏血酸 电化学技术
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Investigation into Impedance Measurements for Rapid Capacity Estimation of Lithium-ion Batteries in Electric Vehicles
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作者 Xiaoyu Zhao Zuolu Wang +1 位作者 Eric Li Haiyan Miao 《Journal of Dynamics, Monitoring and Diagnostics》 2024年第1期21-31,共11页
With the dramatic increase in electric vehicles(EVs)globally,the demand for lithium-ion batteries has grown dramatically,resulting in many batteries being retired in the future.Developing a rapid and robust capacity e... With the dramatic increase in electric vehicles(EVs)globally,the demand for lithium-ion batteries has grown dramatically,resulting in many batteries being retired in the future.Developing a rapid and robust capacity estimation method is a challenging work to recognize the battery aging level on service and provide regroup strategy of the retied batteries in secondary use.There are still limitations on the current rapid battery capacity estimation methods,such as direct current internal resistance(DCIR)and electrochemical impedance spectroscopy(EIS),in terms of efficiency and robustness.To address the challenges,this paper proposes an improved version of DCIR,named pulse impedance technique(PIT),for rapid battery capacity estimation with more robustness.First,PIT is carried out based on the transient current excitation and dynamic voltage measurement using the high sampling frequency,in which the coherence analysis is used to guide the selection of a reliable frequency band.The battery impedance can be extracted in a wide range of frequency bands compared to the traditional DCIR method,which obtains more information on the battery capacity evaluation.Second,various statistical variables are used to extract aging features,and Pearson correlation analysis is applied to determine the highly correlated features.Then a linear regression model is developed to map the relationship between extracted features and battery capacity.To validate the performance of the proposed method,the experimental system is designed to conduct comparative studies between PIT and EIS based on the two 18650 batteries connected in series.The results reveal that the proposed PIT can provide comparative indicators to EIS,which contributes higher estimation accuracy of the proposed PIT method than EIS technology with lower time and cost. 展开更多
关键词 electric vehicles electrochemical impedance spectroscopy lithium-ion battery pulse impedance technique rapid capacity estimation
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GPMCP原位在线监测稻田土壤氨挥发研究
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作者 李天玲 黄家宇 +5 位作者 蒋明昊 李兆兴 汪晨煦 汪正国 邱子健 申卫收 《农业环境科学学报》 CAS CSCD 北大核心 2024年第9期2155-2165,共11页
为实现原位在线精准监测氨挥发并探究农田氨挥发实时排放特征,本研究将自主研发的基于薄膜梯度扩散的电化学氨气实时传感器(GPMCP)应用于施用基肥和分蘖肥后的水稻田进行氨挥发实时跟踪监测。结果首先证实了农田温室气体(CO_(2),CH_(4)... 为实现原位在线精准监测氨挥发并探究农田氨挥发实时排放特征,本研究将自主研发的基于薄膜梯度扩散的电化学氨气实时传感器(GPMCP)应用于施用基肥和分蘖肥后的水稻田进行氨挥发实时跟踪监测。结果首先证实了农田温室气体(CO_(2),CH_(4)和N_(2)O)均对GPMCP监测结果无影响,表明了GPMCP有较强的抗干扰能力。对基肥和分蘖肥期的氨挥发跟踪监测发现,日间平均氨挥发量约是夜间的3倍,每天的11:00—15:00是氨挥发高峰时段(损失率高达40%)。两肥期均在施肥第2天氨排放量达峰,氨累积排放量为(24.4±6.6)kg·hm^(-2),累积氨损失率为7.7%±2.1%。GPMCP与密闭式抽气法测定的氨挥发结果具有良好正相关性,但由于密闭式抽气法受采样时段限制,其实测值低于GPMCP。与当前常用氨监测法相比,GPMCP更能有效捕捉氨挥发动态变化过程、精准反映氨挥发规律,有望成为农田氨挥发精准监测新技术,极具推广应用潜力。 展开更多
关键词 膜透过电化学传感技术 氨挥发 原位实时 在线监测 水稻田
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电化学修复技术对钢筋混凝土柱耐久性能的研究
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作者 王向林 陈先明 +2 位作者 郑大明 周义强 周立黎 《建筑施工》 2024年第11期1738-1742,共5页
在腐蚀、氯盐侵蚀等不利条件下,沿海地区大量桥梁工程、海洋工程、基础设施等结构出现锈胀开裂、耐久性严重劣化案例屡见不鲜。采用电化学修复技术通过电场作用将混凝土中有害物质驱逐,从而提高混凝土结构耐久性能,已在工程实例中得到... 在腐蚀、氯盐侵蚀等不利条件下,沿海地区大量桥梁工程、海洋工程、基础设施等结构出现锈胀开裂、耐久性严重劣化案例屡见不鲜。采用电化学修复技术通过电场作用将混凝土中有害物质驱逐,从而提高混凝土结构耐久性能,已在工程实例中得到验证。通过概述电化学修复技术的基本机理及其对钢筋阴极产生析氢的全过程,结合国内外大量文献,研究了电化学修复技术对材料性能、黏结滑移性能退化的影响,同时考虑时间效应,进一步分析了电化学修复技术对钢筋混凝土柱耐久性能的影响。该研究结果对提高沿海地区混凝土结构的使用寿命具有积极意义。 展开更多
关键词 电化学修复技术 钢筋混凝土结构 耐久性能 黏结滑移性能 析氢反应 静置时间
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微区扫描电化学测试技术原理及其应用进展
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作者 李天瑞 李鑫 +3 位作者 刘畅 蒋绍妍 石忠宁 刘风国 《当代化工研究》 CAS 2024年第8期14-16,共3页
微区扫描电化学测试由于其独特的检测手段被广泛运用。本文综述了扫描振动电极技术(SVET)、扫描开尔文探针技术(SKP)、电化学阻抗谱技术(LEIS)、扫描电化学显微技术(SECM)四个微区扫描电化学测试技术的原理。并总结了微区扫描电化学测... 微区扫描电化学测试由于其独特的检测手段被广泛运用。本文综述了扫描振动电极技术(SVET)、扫描开尔文探针技术(SKP)、电化学阻抗谱技术(LEIS)、扫描电化学显微技术(SECM)四个微区扫描电化学测试技术的原理。并总结了微区扫描电化学测试技术在腐蚀、生物科学扫描、界面反应和能源方面的发现与应用。微区扫描电化学技术与传统电化学测量技术、扫描电镜技术等相结合,将有助于更深入地理解电化学行为,为材料、生物、能源等领域研究取得新突破提供技术支持。 展开更多
关键词 扫描振动电极 扫描开尔文探针 微区电化学阻抗谱 扫描电化学显微镜
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修饰技术在电化学传感器领域的研究文献综述
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作者 张赫扬 薄韬 《中阿科技论坛(中英文)》 2024年第10期69-73,共5页
综合文献分析可见:随着科技水平的加速进步,电化学传感器正朝着更小、更灵敏、更耐用和更低成本的方向发展。近年来,分子印迹聚合物修饰、碳纳米材料修饰、纳米粒子修饰以及DNA修饰等电化学传感器修饰技术取得了显著进展。分子印迹聚合... 综合文献分析可见:随着科技水平的加速进步,电化学传感器正朝着更小、更灵敏、更耐用和更低成本的方向发展。近年来,分子印迹聚合物修饰、碳纳米材料修饰、纳米粒子修饰以及DNA修饰等电化学传感器修饰技术取得了显著进展。分子印迹聚合物修饰可赋予传感器高度的选择性和特异性,能够准确识别目标分子;碳纳米材料修饰能够极大地提高传感器的导电性和稳定性,增强其检测性能;纳米粒子修饰为传感器带来独特的光学、电学和催化特性,拓宽了检测范围和灵敏度;DNA修饰则利用核酸的特异性结合能力,为特定生物分子的检测提供了新途径。随着研究的不断深入,修饰技术有望在环境监测、生物医学、食品安全等领域得到更广泛的应用。 展开更多
关键词 电化学传感器 碳纳米材料 分子印迹聚合物 修饰技术
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中水回用技术的研究与应用
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作者 周迎迎 《皮革制作与环保科技》 2024年第15期22-24,共3页
应对水资源短缺的有效方法是中水循环利用技术。本文针对污水现状、来源及处理工艺的不同,探讨了中水回用的概念、技术应用的比较、污水指标及处理工艺机理方法的比较。论述了采用膜分离技术和电化学吸附除垢除盐技术处理并回收中水,详... 应对水资源短缺的有效方法是中水循环利用技术。本文针对污水现状、来源及处理工艺的不同,探讨了中水回用的概念、技术应用的比较、污水指标及处理工艺机理方法的比较。论述了采用膜分离技术和电化学吸附除垢除盐技术处理并回收中水,详细说明为了实现水资源最大程度的循环利用,将这些技术应用于废水再利用,可以为实现零排污奠定基础。 展开更多
关键词 中水回用 污水指标 膜法技术 电化学吸附除垢除盐技术
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Effect of Rapid Quenching on Microstructures and Electrochemical Performances of La_2Mg(Ni_(0.85)Co_(0.15))_9M_(0.1)(M=B, Cr) Hydrogen Storage Alloys 被引量:4
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作者 张羊换 董小平 +3 位作者 王国清 冯猛 任江远 王新林 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第4期460-465,共6页
The La-Mg-Ni-system (PuNi3-type) La2Mg (Ni0.85 Co0.15 )9M0.1 ( M = B, Cr) hydrogen storage etectrode alloys were prepared by casting and rapid quenching. The electrochemical performances and microstructures of t... The La-Mg-Ni-system (PuNi3-type) La2Mg (Ni0.85 Co0.15 )9M0.1 ( M = B, Cr) hydrogen storage etectrode alloys were prepared by casting and rapid quenching. The electrochemical performances and microstructures of the as-cast and quenched alloys were determined and measured. The effects of rapid quenching on the microstructures and electrochemical properties of the alloys were investigated in detail. The obtained results show that the alloys are composed of the (La, Mg) Ni3 phase (PuNi3-type structure) and the LaNi5 phase, as well as the small amount of the LaNi2 phase. A trace of the Ni2B phase exists in the as-cast alloy containing boron, and the Ni2B phase in the alloy nearly disappears after rapid quenching. The relative amount of each phase in the alloys depends on the quenching rate. The rapid quenching technique can greatly improve the electrochemical performance of the alloy, and the effect of rapid quenching on the activation performances of the alloys is minor. Rapid quenching enhances the cycle stability of the alloy, and the cycle life of the alloy increases with the increase of the quenching rate. 展开更多
关键词 La-Mg-Ni system hydrogen electrode alloy rapid quenching technique electrochemical performance MICROSTRUCTURE rarearthse
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Decoding lithium batteries through advanced in situ characterization techniques 被引量:7
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作者 Mei Yang Ruyi Bi +2 位作者 Jiangyan Wang Ranbo Yu Dan Wang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第5期965-989,共25页
Given the energy demands of the electromobility market,the energy density and safety of lithium batteries(LBs)need to be improved,whereas its cost needs to be decreased.For the enhanced performance and decreased cost,... Given the energy demands of the electromobility market,the energy density and safety of lithium batteries(LBs)need to be improved,whereas its cost needs to be decreased.For the enhanced performance and decreased cost,more suitable electrode and electrolyte materials should be developed based on the improved understanding of the degradation mechanisms and structure–performance correlation in the LB system.Thus,various in situ characterization technologies have been developed during the past decades,providing abundant guidelines on the design of electrode and electrolyte materials.Here we first review the progress of in situ characterization of LBs and emphasize the feature of the multi-model coupling of different characterization techniques.Then,we systematically discuss how in situ characterization technologies reveal the electrochemical processes and fundamental mechanisms of different electrode systems based on representative electrode materials and electrolyte components.Finally,we discuss the current challenges,future opportunities,and possible directions to promote in situ characterization technologies for further improvement of the battery performance. 展开更多
关键词 in situ characterization techniques multi-modal coupling lithium batteries electrochemical mechanism
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