Abstracts Book - IMRC 2018

• SC1-O001 Invited Talk
MATERIALS AND SURFACE/INTERFACE DESIGNS FOR ALL-SOLID-
STATE LITHIUM ION RECHARGEABLE BATTERIES ~ FLUX CRYSTAL
GROWTH APPROACHES FOR CATHODES AND SOLID
ELECTROLYTES ~
Katsuya Teshima 1 , Tetsuya Yamada 1 , Nobuyuki Zettsu 1
1 Shinshu University, Center for Energy and Environmental Science, Japan.
Lithium ion rechargeable batteries (LIBs) are one of the most promising energy
storage devices because of their high power and high energy density. Although
LIBs have been successfully commercialized, the enhancement in their energy
density is further necessary to satisfy modern society needs for application such
as electric vehicles, power tools and so on. For example, all-solid-state LIBs with
higher energy density are indispensable for next-generation energy storage
devices. In our laboratory, we have concentrated to control and design
surfaces/interfaces and fabricate materials for all-solid-state LIBs basing on flux
crystal growth techniques. Flux growth is a kind of liquid phase crystal growth
technique, in which molten metals and molten metal salts are used as solvents.
Characteristic features of flux-grown crystals are high-quality without thermal
strain, idiomorphic shape with specific crystal facets, and controlled shape and
size. Various kinds of active materials (for positive and negative electrodes) and
solid electrolytes for all-solid-state LIBs have been successfully grown by
common flux method. In addition, we have developed flux method to fabricate
crystal layers (i.e., electrodes) and crystal interfaces (i.e., multilayers) with good
interfaces, which is named flux coating method. The above-mentioned
crystalline materials showed relatively high LIB performances (and
electrochemical properties) Herein, we will present the fabrication of highly
crystalline particles and layers by our flux growth innovation and their LIB
performances.
Acknowledgment:
Our research is financially supported by JST-CREST, JST-ALCA and KAKENHI
(25249089, 17H01322, 17H05479).
Keywords: Lithium ion rechargeable battery, Flux growth, Material and interface
Presenting authors email: teshima@shinshu-u.ac.jp