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[Analysis Case] Evaluation of Si Anode in Lithium-ion Secondary Batteries

C0221.jpg
充電曲線およびSi負極の携帯観察.png
Si負極の充電前後の表面形状観察.png
充電後のSi負極のEELS測定結果.png

[Analysis Case] Evaluation of Si Anode in Lithium-ion Secondary Batteries

C0221.jpg
C0221.jpg 充電曲線およびSi負極の携帯観察.png Si負極の充電前後の表面形状観察.png 充電後のSi負極のEELS測定結果.png

It is possible to evaluate the state of the electrodes before and after charging, as well as the presence and distribution of Li.

Silicon (Si) is one of the candidates for high-capacity anode active materials, but it is said to suffer from severe cycle degradation due to the very large volume changes during charge and discharge. We dismantled and observed the Si anode before and after charging under controlled atmospheric conditions. Furthermore, we created cross-sectional observation samples using the FIB micro-sampling method and conducted shape observation and EELS measurements with a Cs-corrected STEM device to evaluate the condition of the Si electrode and the distribution of Li within the electrode.

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Measurement methods: TEM, STEM-HAADF, EELS, EDX Product field: Secondary batteries Analysis purposes: Composition evaluation, identification, shape evaluation, degradation investigation, reliability assessment

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[Analysis Case] Evaluation of Lithium-Ion Secondary Battery Si Anode_C0221

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