Bottom-current-collector-free thin-film batteries using LiNi0.8Co0.2O2 epitaxial thin films

JOURNAL OF POWER SOURCES

卷:416

Article

Nishio, Kazunori¹  Horiba, Koji²  Nakamura, Naoto¹  Kitamura, Miho²  Kumigashira, Hiroshi^2,3  Shimizu, Ryota^1,4  Hitosugi, Taro¹ 

[1] Tokyo Inst Technol, Sch Mat & Chem Technol, Tokyo 1528552, Japan

[2] High Energy Accelerator Res Org KEK, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] Japan Sci & Technol Agcy, Presto, Kawaguchi, Saitama 3320012, Japan

关键词: Solid-state battery;    LiNi0.8Co0.2O2;    Epitaxial thin film;    Pulsed laser deposition;    Interface resistance;   

DOI  :  10.1016/j.jpowsour.2019.01.067

来源: Elsevier

【 摘 要 】

The decrease in the resistance at solid electrolyte and electrode interfaces has become a critical issue in the development of solid-state lithium batteries. To understand the ionic transport properties across solid electrolyte and electrode interfaces, thin-film batteries consisting of flat epitaxial films are of considerable importance. Herein, we report the operation of bottom-current-collector-free thin-film batteries using LiNi0.8Co0.2O2 epitaxial thin films. As the bottom current collector is not inserted between the substrates and LiNi0.8Co0.2O2, the surface of LiNi0.8Co0.2O2 is very flat, with a surface roughness average of approximately 0.44 nm. This study proposes a very flat electrode surface suitable for the investigation of interfacial phenomena at solid electrolyte and electrode interfaces.

【 授权许可】

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