材料科学
X射线光电子能谱
光谱学
阴极
电解质
光电发射光谱学
分析化学(期刊)
电池(电)
电极
化学工程
化学
物理化学
量子力学
物理
工程类
功率(物理)
色谱法
作者
Yulong Liu,Qian Sun,Jingru Liu,Mohammad Norouzi Banis,Yang Zhao,Biqiong Wang,Keegan R. Adair,Yongfeng Hu,Qinghua Xiao,Cheng Zhang,Li Zhang,Shigang Lu,Huan Huang,Xiping Song,Xueliang Sun
标识
DOI:10.1021/acsami.9b16343
摘要
All-solid-state batteries are expected to be promising next-generation energy storage systems with increased energy density compared to the state-of-the-art Li-ion batteries. Nonetheless, the electrochemical performances of the all-solid-state batteries are currently limited by the high interfacial resistance between active electrode materials and solid-state electrolytes. In particular, elemental interdiffusion and the formation of interlayers with low ionic conductivity are known to restrict the battery performance. Herein, we apply a nondestructive variable-energy hard X-ray photoemission spectroscopy to detect the elemental chemical states at the interface between the cathode and the solid-state electrolyte, in comparison to the widely used angle-resolved (variable-angle) X-ray photoemission spectroscopy/X-ray absorption spectroscopy methods. The accuracy of variable-energy hard X-ray photoemission spectroscopy is also verified with a focused ion beam and high-resolution transmission electron microscopy. We also show the significant suppression of interdiffusion by building an artificial layer via atomic layer deposition at this interface.
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