In situ electron holography of electric potentials inside a solid-state electrolyte: Effect of electric-field leakage

Yuka Aizawa; Kazuo Yamamoto; Takeshi Sato; Hidekazu Murata; Ryuji Yoshida; Craig A J Fisher; Takehisa Kato; Yasutoshi Iriyama; Tsukasa Hirayama

doi:10.1016/j.ultramic.2016.07.015

In situ electron holography of electric potentials inside a solid-state electrolyte: Effect of electric-field leakage

Ultramicroscopy. 2017 Jul:178:20-26. doi: 10.1016/j.ultramic.2016.07.015. Epub 2016 Jul 30.

Authors

Yuka Aizawa¹, Kazuo Yamamoto¹, Takeshi Sato¹, Hidekazu Murata², Ryuji Yoshida¹, Craig A J Fisher¹, Takehisa Kato³, Yasutoshi Iriyama³, Tsukasa Hirayama⁴

Affiliations

¹ Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya, Aichi 456-8587, Japan.
² Faculty of Science and Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, Aichi 468-8502, Japan.
³ Department of Materials, Physics and Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan.
⁴ Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya, Aichi 456-8587, Japan. Electronic address: t-hirayama@jfcc.or.jp.

PMID: 27528443
DOI: 10.1016/j.ultramic.2016.07.015

Abstract

In situ electron holography is used to observe changes of electric-potential distributions in an amorphous lithium phosphorus oxynitride (LiPON) solid-state electrolyte when different voltages are applied. 2D phase images are simulated by integrating the 3D potential distribution along the electron trajectory through a thin Cu/LiPON/Cu region. Good agreement between experimental and simulated phase distributions is obtained when the influence of the external electric field is taken into account using the 3D boundary-charge method. Based on the precise potential changes, the lithium-ion and lithium-vacancy distributions inside the LiPON layer and electric double layers (EDLs) are inferred. The gradients of the phase drops at the interfaces in relation to EDL widths are discussed.

Keywords: 3D-boundary-charge method; Effect of electric-field leakage; Electric-potential distribution; Electron holography; Solid electrolyte.

Publication types

Research Support, Non-U.S. Gov't