TAIYO YUDEN: All-solid lithium-ion secondary battery: Wearable, mobile, smaller and thinner
-Applying various technologies of multilayer ceramic capacitors to achieve high safety-
December 10, 2019
Taiyo Yuden: All-solid-state battery
TAIYO YUDEN has developed an all-solid-state lithium-ion secondary battery (all-solid-state battery) utilizing the processing technology of multilayer ceramic capacitors (MLCC).
An all-solid-state battery is a secondary battery in which the electrolyte of a conventional lithium-ion secondary battery is replaced with a solid.
Taiyo Yuden has realized an all-solid-state battery using oxide-based solid electrolyte ceramics by applying the material technology and process technology cultivated in its main product MLCC.
All-solid-state battery: main features
Our all-solid-state batteries hardly react with moisture or carbon dioxide in the atmosphere.
It does not burn because no electrolyte is used.
The manufacturing process of MLCC can be diverted.
By applying existing process technologies, the solid electrolyte can be made thinner and more multi-layered, enabling smaller size and larger capacity.
All-solid-state battery: production plan
Lineup centered on 4532 size (4.5×3.2×3.2mm), which is equivalent to MLCC, to 1005 size (1.0×0.5×0.5mm),
Sample shipments begin in 2020.
Plans to start mass production in FY2021.
All-solid-state batteries: high capacity and safety
In recent years, wearable and mobile devices have become smaller and thinner.
For higher performance and longer operating time, larger capacity batteries are required.
Wearable devices need to be more secure to prevent battery ignition or abnormal heating.
For this reason, the installed battery must be small, large-capacity, and highly secure.
Conventional lithium-ion secondary battery: problems
General lithium-ion secondary batteries use liquids or polymers for the electrolyte.
Problems for miniaturization such as separators and external packages.
In addition, harmful substances are released when the electrolyte is decomposed.
Risk of abnormal heating or ignition due to short circuit.
All-solid-state battery this time: Improvements
To eliminate these disadvantages, we have developed an all-solid-state battery in which the electrolyte is replaced with a solid.
The all-solid-state battery we have developed
Uses original oxide solid electrolyte ceramics.
No separator is required.
By using the lamination process, both miniaturization and large capacity are achieved.
Our own: oxide solid electrolyte ceramics
Our unique oxide-based solid electrolyte ceramics hardly reacts with atmospheric components.
No special environment such as high-level dry room is required.
It is possible to divert the manufacturing process technology of MLCC, our main business.
https://www.yuden.co.jp/cms/wp-content/uploads/2019/12/a298a40f9044b7a589f434afa5f133b0.pdf