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[Analysis Case] Analysis of the Binding State of Li in Lithium-Ion Secondary Batteries

C0389.jpg
Liスペクトル.jpg
Li結合状態別存在比.jpg

[Analysis Case] Analysis of the Binding State of Li in Lithium-Ion Secondary Batteries

C0389.jpg
C0389.jpg Liスペクトル.jpg Li結合状態別存在比.jpg

By analyzing the waveform of other elements, it is possible to calculate the existence ratio of Li based on its bonding states.

In lithium-ion secondary batteries, the SEI layer (solid electrolyte interface) is a significant factor affecting the battery's lifespan, and it is important to understand the chemical species of Li contained within it. Li itself has a small chemical shift, making direct evaluation difficult; however, by performing waveform analysis to separate the states of the bonding partner elements (C, O, F, P), it is possible to calculate the presence ratio of Li in different bonding states. An evaluation of the state of Li before and after cycle testing revealed that after the test, the presence ratios of Li2CO3 and Li-POxFy increased compared to before the test.

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Analysis of secondary batteries.

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[Analysis Case] Analysis of the Binding State of Li in Lithium-Ion Secondary Batteries_C0389

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