Interfacial Dynamics of Dendrite Electrodeposition

枝晶电沉积的界面动力学

• 批准号: 9306837
• 负责人: Dale Barkey
• 金额: $ 24万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9306837&HistoricalAwards=false
• 关键词: Interfacial; Dynamics; Dendrite; Electrodeposition

Dale Barkey 9306837 This is a study of the spontaneous growth of electrodeposited metal dendrites. Both experimental and theoretical investigations of the initiation and propagation of dendrites are included, with emphasis on interfacial dynamics. Experimental studies of the metal/solution interface focus on nucleation and growth under pristine conditions with high spatial resolution. The theoretical component relates these interfacial processes to the appearance of macroscopic structure and to growth velocity. Experimental techniques include voltammetry, electrochemical impedance spectroscopy, atomic force and scanning tunnelling microscopies, and optical methods including shadowgraph imaging and holographic interferometry. Single-crystal electrodes and needle electrodes are used to examine the effects of crystalline anisotropy and curvature on the deposition dynamics. Spontaneous growth of dendrites is often the limiting factor for space-time yields in technologies using electrodeposition, including electrochemical processing, energy storage, and metal finishing. (For example, it is the principal cause of failure in automotive batteries.) This study is an attempt to relate microscopic interfacial processes with the appearance and growth of macroscopic dendrites. The emphasis is on metals of commercial significance in plating, energy storage (batteries), and structural materials.

Dale Barkey 9306837 本文研究电沉积金属枝晶的自发生长。 包括实验和理论研究的树枝晶的起始和传播，重点是界面动力学。 金属/溶液界面的实验研究集中在具有高空间分辨率的原始条件下的成核和生长。 理论部分将这些界面过程与宏观结构的外观和生长速度联系起来。 实验技术包括伏安法，电化学阻抗谱，原子力和扫描隧道显微镜，以及光学方法，包括阴影成像和全息干涉。单晶电极和针电极被用来检查晶体各向异性和曲率的沉积动力学的影响。 枝晶的自发生长通常是使用电沉积的技术（包括电化学加工、能量存储和金属精加工）中的时空产率的限制因素。 (For例如，它是汽车电池失效的主要原因。 本研究试图将微观界面过程与宏观枝晶的出现和生长联系起来。 重点是在电镀，储能（电池）和结构材料的商业意义的金属。