42 SPECTROSCOPY


Fig.4. High-speed high-temperature XRD recorded every 0.5 second showing growth of grain size of aluminum alloy with increasing temperature until the sample melted


was examined. Evaluation of the stability of electrode materials is very important in


Ni0.5


steep temperature ramp of 300°/min. T e data shows grain growth and grain collapse during the melting process. Using a battery cell attachment, operando charging and discharging of the positive electrode material LiMn1.5


O4


Fig. 5. Operando XRD measurement on Li-ion battery material with charge and discharge cycles. Contour level data shown on left bottom shows XRD diff raction angle 2θ along horizontal axis and charge/ discharge cycles along vertical axis


the development of fast-cycling Li-ion batteries. In Fig. 5, multiple high-speed 1D profi les, acquired over time, are shown (top). T e lower fi gure was generated with SmartLab Studio II’s Data Visualisation plugin, and clearly shows phase stability within the charge/discharge cycle.


Keisuke Saito is with Rigaku. www.rigaku.com


JUNE 2018


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