Rhodes Kevin, Kirkham Melanie, Meisner Roberta, Parish Chad M, Dudney Nancy, Daniel Claus
Materials Science and Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd., MS 6083, Oak Ridge, Tennessee 37931-6083, USA.
Rev Sci Instrum. 2011 Jul;82(7):075107. doi: 10.1063/1.3607961.
An in situ acoustic emission (AE) and x-ray diffraction cell for use in the study of battery electrode materials has been designed and tested. This cell uses commercially available coin cell hardware retrofitted with a metalized polyethylene terephthalate (PET) disk, which acts as both an x-ray window and a current collector. In this manner, the use of beryllium and its associated cost and hazards is avoided. An AE sensor may be affixed to the cell face opposite the PET window in order to monitor degradation effects, such as particle fracture, during cell cycling. Silicon particles, which were previously studied by the AE technique, were tested in this cell as a model material. The performance of these cells compared well with unmodified coin cells, while providing information about structural changes in the active material as the cell is repeatedly charged and discharged.
设计并测试了一种用于研究电池电极材料的原位声发射（AE）和X射线衍射池。该池使用了配备有金属化聚对苯二甲酸乙二酯（PET）盘的市售硬币电池硬件，该PET盘既作为X射线窗口又作为集流体。通过这种方式，避免了铍的使用及其相关成本和危害。可以将AE传感器固定在与PET窗口相对的池面上，以监测电池循环过程中的降解效应，例如颗粒破裂。先前通过AE技术研究过的硅颗粒作为模型材料在该池中进行了测试。这些池的性能与未改性的硬币电池相比表现良好，同时提供了有关活性材料在电池反复充电和放电时结构变化的信息。
