Nanoscale optical imaging of lithium-ion distribution on a LiCoO2 cathode surface
Nanoscale optical imaging of lithium-ion distribution on a LiCoO2 cathode surface
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DOI：
10.7567/apex.10.052503
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发表时间：
2017-04
影响因子：
2.3
通讯作者：
K. Hara;T. Yano;Jun-ichi Hata;K. Hikima;Kota Suzuki;M. Hirayama;R. Kanno;M. Hara
中科院分区：
文献类型：
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作者：
K. Hara;T. Yano;Jun-ichi Hata;K. Hikima;Kota Suzuki;M. Hirayama;R. Kanno;M. Hara
锂离子电池正极材料中局部锂离子浓度的纳米级分析对于实现高性能电池至关重要。我们开发了一种近场光学技术，在纳米尺度上可视化锂离子电池阴极中的锂离子分布。采用等离子体金属尖端来局部增强和探测靠近LiCoO2薄膜的电场，因为它与表面处的锂离子浓度相关。我们还利用这种技术来映射的电化学诱导的离子扩散下的应用程序的直流电压的表面通过等离子体金属尖端的晶界。
Nanoscale analysis of the local lithium-ion concentration in lithium-ion battery cathode materials is essential for achieving high-performance batteries. We developed a near-field optical technique to visualize the lithium-ion distribution in a lithium-ion battery cathode on a nanometer scale. A plasmonic metallic tip was employed to locally enhance and probe the electric field in close proximity to the LiCoO2 thin film, since it is correlated with the lithium-ion concentration at the surface. We also utilized this technique to map the electrochemically induced ion diffusion at the grain boundaries under the application of a DC voltage to the surface through the plasmonic metallic tip.