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| Study on Electrochemical Impedance Spectroscopy of Silicon-Titanium Anode in Lithiation Storage Process |
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Received:October 02, 2019
Revised:October 04, 2019
Accepted:October 07, 2019
Published Online:April 18, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.05.015 |
| KeyWord:silicon-titanium anode; electrochemical impedance spectroscopy; lithium-ion batteries |
| Author | Institution |
| ZHOU Zhong-ren |
昆明理工大学 冶金与能源工程学院;锂离子电池及材料国家地方联合工程实验室 |
| ZHANG Ying-jie |
昆明理工大学 冶金与能源工程学院 |
| HUA Yi-xin |
昆明理工大学 冶金与能源工程学院 |
| DONG Peng |
昆明理工大学 冶金与能源工程学院 |
| ZHANG Qi-bo |
昆明理工大学 冶金与能源工程学院 |
| DUAN Jian-guo |
昆明理工大学 冶金与能源工程学院 |
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| Abstract: |
| In order to investigate influence of titanium content on electrochemical lithiation storage kinetics of silicon-titanium anode, resistance value of anode was measured as it was discharged/charged for 100 cycles at current density of 200 mA/g with Ti/Si molar ratios of 50 and 25 respectively. The results suggest that decreasing silicon concentration of composite benefits reduces production of SEI (Solid Electrolyte Interphase) and thus reduces charge transfer resistance. As molar ratio of Ti/Si is 25, the anode exhibits better reaction kinetics with charge transfer resistance rising from 142 Ω to 212 Ω. |
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