Spatially resolved in operando neutron scattering studies on Li-ion batteries
Spatially resolved in operando neutron scattering studies on Li-ion batteries
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DOI：
10.1016/j.jpowsour.2013.06.158
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发表时间：
2014
影响因子：
9.2
通讯作者：
A. Senyshyn;M. Mühlbauer;O. Dolotko;M. Hofmann;T. Pirling;H. Ehrenberg
中科院分区：
文献类型：
--
作者：
A. Senyshyn;M. Mühlbauer;O. Dolotko;M. Hofmann;T. Pirling;H. Ehrenberg
应用空间分辨中子衍射法探测了18650型商用锂离子电池的径向锂离子分布。考虑光束衰减和电池几何效应，观察并评价了LiCoO2（正极，“阴极”）、石墨和锂插层石墨（负极，“阳极”）的选定Bragg反射的空间演变。在所研究的一组电池中没有发现锂不均匀性的证据。使用单色中子束的计算机中子层析成像证实了锂的均匀分布。讨论了单色光束与锂离子电池中子成像研究的相关性。
Spatially-resolved neutron diffraction has been applied to probe the lithium distribution in radial direction of a commercial Li-ion cell of 18650-type. The spatial evolution of selected Bragg reflections for LiCoO2(positive electrode, “cathode”) and graphite and lithium intercalated graphite (negative electrode, “anode”) was observed and evaluated by taking beam attenuation and cell geometry effects into account. No evidences for lithium inhomogeneities have been found for the investigated set of cells. Computed neutron tomography using a monochromatic neutron beam confirmed the homogeneous lithium distribution. The relevance of the monochromatic beam to neutron imaging studies of Li-ion cells is discussed.