Surface Characterization of LiFePO4 Epitaxial Thin Films by X-ray/Neutron Reflectometry
Surface Characterization of LiFePO4 Epitaxial Thin Films by X-ray/Neutron Reflectometry
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DOI：
10.5796/electrochemistry.78.413
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发表时间：
2010-05-01
期刊：
影响因子：
2.5
通讯作者：
Kanno, Ryoji
中科院分区：
文献类型：
--
作者：
Hirayama, Masaaki;Yonemura, Masao;Kanno, Ryoji
采用原位反射技术和外延薄膜技术对锂电池电极表面进行了表征。采用脉冲激光沉积法制备了LiFePO 4薄膜。在表面上的界面结构的变化，确定通过X射线和中子反射率（NR）测量使用X射线透射电化学电池。LiFePO 4表面在第一次充电/放电过程中是稳定的。NR分析表明，在锂脱嵌时，在LiFePO 4/电解质界面处锂离子的浓度梯度发生可逆变化。
The electrode surface of a lithium battery was characterized using in situ reflectivity techniques and epitaxial thin films. Epitaxial LiFePO4 thin films were fabricated by pulsed laser deposition. Changes in interfacial structures on the surface are determined by X-ray and neutron reflectivity (NR) measurements using an X-ray-transmission electrochemical cell. The LiFePO4 surface is stable during the first charge/discharge process. NR analysis indicates a reversible change in the concentration gradient of lithium ions at the LiFePO4/electrolyte interface on lithium deintercalation.