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影响因子：14.919

DOI码：10.1038/ncomms3568

发表刊物：Nature Communications

关键字：PHOSPHOOLIVINES；LITHIUM；ABSORPTION；LIXFEPO4；LITHIATION；PARTICLES；CATHODE；IONS

摘要：Developing high-performance batteries relies on material breakthroughs. During the past few years, various in situ characterization tools have been developed and have become indispensible in studying and the eventual optimization of battery materials. However, soft X-ray spectroscopy, one of the most sensitive probes of electronic states, has been mainly limited to ex situ experiments for battery research. Here we achieve in situ and operando soft X-ray absorption spectroscopy of lithium-ion battery cathodes. Taking advantage of the elemental, chemical and surface sensitivities of soft X-rays, we discover distinct lithium-ion and electron dynamics in Li(Co1/3Ni1/3Mn1/3)O2 and LiFePO4 cathodes in polymer electrolytes. The contrast between the two systems and the relaxation effect in LiFePO4 is attributed to a phase transformation mechanism, and the mesoscale morphology and charge conductivity of the electrodes. These discoveries demonstrate feasibility and power of in situ soft X-ray spectroscopy for studying integrated and dynamic effects in batteries.

合写作者：Dongdong Wang, Venkat Srinivasan, Zhi Liu, Zahid Hussain, Wanli Yang

第一作者：Xiaosong Liu

通讯作者：Liu Gao

论文编号：2568

卷号：4

页面范围：2568

ISSN号：2041-1723

是否译文：否

发表时间：2013-10-08

发布期刊链接：https://www.nature.com/articles/ncomms3568