| 陈静允,梁朋,马琳鸽,韩志华,蒋复国,李永龙.化学通报,2023,86(7):873-877. |
| 利用XPS 氩离子刻蚀表征锂离子电池Si/C负极材料中含硅的活性物质 |
| Characterization of Si Active Species of Si/C Anode in Lithium Ion Battery using XPS Ar ion sputtering |
| 投稿时间：2022-09-26 修订日期：2022-10-20 |
| DOI： |
| 中文关键词: 锂离子电池，Si/C负极材料，氩离子刻蚀, SiOx，活性物质 |
| 英文关键词:active species, Si/C anode material, Ar ion sputtering, lithium ion battery |
| 基金项目: |
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| 摘要点击次数: 646 |
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| 中文摘要: |
| 以石墨、沥青和纳米硅粉为原料制备了锂离子电池Si/C负极材料，使用SEM/ BSE 、Raman、XRD、XPS及XPS氩离子刻蚀等方法对其硅活性物质进行了具体分析。结果表明，XRD和Raman仅判断出负极材料中含有活性物质单质Si；常规XPS结果发现近一半的Si已被氧化为惰性物质SiO2；而使用XPS氩离子刻蚀方法发现负极材料中Si存在5种化学态，包括活性物质单质Si、Si2O、SiO、Si2O3，及惰性物质SiO2；定量结果表明，复合材料的硅活性物质高于96.56%，且主要结构是低价态硅氧化物，而非单质Si。XPS氩离子刻蚀的分析方法为锂离子电池负极材料中硅活性物质的研究提供了新思路。 |
| 英文摘要: |
| The active species of Si/C anode materials for lithium ion batteries are characterized with scanning electron microscopy/ back scatter electron image (SEM /BSE), X-ray diffraction(XRD), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS) and XPS Ar ion sputtering, and the anode materials are prepared with graphite, asphalt and nano silicon powder. XRD and Raman results indicate that only element Si is detected. When XPS is employed, it is found that nearly half of Si has been oxidized as inactive SiO2 with routine analysis. While using XPS Ar ion sputtering method there are five chemical states of Si, including active species Si, Si2O, SiO, Si2O3 and inactive SiO2. As for the active specie, their total content is higher than 96.56% based on quantitative calculation, and the major active ones are silicon sub-oxides rather than elemental Si. XPS Ar ion sputtering will be an effective alternative analysis method in the characterization of active species of Si/C anode for lithium ion batteries. |
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