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    • 5. 发明授权
    • Real space mapping of ionic diffusion and electrochemical activity in energy storage and conversion materials
    • 能量储存和转换材料中离子扩散和电化学活性的实际空间映射
    • US08719961B2
    • 2014-05-06
    • US13291480
    • 2011-11-08
    • Sergei V. KalininNina BalkeAmit KumarNancy J. DudneyStephen Jesse
    • Sergei V. KalininNina BalkeAmit KumarNancy J. DudneyStephen Jesse
    • G01Q60/60
    • G01Q60/60G01Q60/02G01Q60/30
    • A method and system for probing mobile ion diffusivity and electrochemical reactivity on a nanometer length scale of a free electrochemically active surface includes a control module that biases the surface of the material. An electrical excitation signal is applied to the material and induces the movement of mobile ions. An SPM probe in contact with the surface of the material detects the displacement of mobile ions at the surface of the material. A detector measures an electromechanical strain response at the surface of the material based on the movement and reactions of the mobile ions. The use of an SPM tip to detect local deformations allows highly reproducible measurements in an ambient environment without visible changes in surface structure. The measurements illustrate effective spatial resolution comparable with defect spacing and well below characteristic grain sizes of the material.
    • 用于探测自由电化学活性表面的纳米尺度上的移动离子扩散率和电化学反应性的方法和系统包括偏压材料表面的控制模块。 电激励信号被施加到材料并引起移动离子的移动。 与材料表面接触的SPM探针检测到材料表面上的移动离子的位移。 检测器基于移动离子的运动和反应来测量材料表面处的机电应变响应。 使用SPM尖端来检测局部变形允许在周围环境中进行高度可重复的测量,而没有表面结构的可见变化。 测量结果说明了有效的空间分辨率与缺陷间距相当,远远低于材料的特征晶粒尺寸。