原子探针
锂(药物)
电极
材料科学
锂原子
碳原子
碳纤维
纤维
Atom(片上系统)
分析化学(期刊)
离子
化学
纳米技术
复合材料
医学
物理化学
色谱法
内科学
有机化学
计算机科学
戒指(化学)
复合数
电离
透射电子显微镜
嵌入式系统
作者
Marcus Johansen,Mahander Pratap Singh,Baptiste Gault,Fang Liu
摘要
Abstract Carbon fibers can play dual roles, carrying mechanical load and hosting lithium (Li) simultaneously in multifunctional devices called structural batteries. It is essential to gain a detailed understanding on the interaction between Li and carbon fibers on the nanoscale. Atom probe tomography (APT) can potentially reveal individual Li and C atoms. However, lithiated carbon fibers experience massive Li migration once exposed to the electric field in the APT instrument. We show that a few nanometers of a chromium (Cr) coating on APT specimens can shield the electric field and suppress the massive Li migration. The related effects of the Cr coating, such as introduction of oxygen, enhanced mass resolving power of the mass spectrum, and increased portion of single hits, are also discussed.
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