Japan Develops Non-Flammable Quasi-Solid-State Lithium-Ion Battery

On October 11, 2024, researchers from Japan announced the development of a non-flammable quasi-solid-state lithium-ion battery (LIB) aimed at enhancing safety and performance. Led by Ryosuke Kido from Doshisha University and TDK Corporation, the findings were published in the Journal of Energy Storage.

The new battery combines a liquid electrolyte with a solid electrolyte, utilizing a silicon negative electrode and a LiNi

0.8

Co

0.1

Mn

0.1

O

2

(NCM811) positive electrode. These materials are recognized as next-generation components for LIBs. A solid lithium-ion conducting glass ceramic sheet (LICGC™) separates the electrodes.

Key features include:

• Utilization of flame-retardant, nearly saturated electrolyte solutions, enhancing compatibility and performance.

• The battery exhibited high ionic conductivity, thermal stability, and excellent electrochemical performance.

• 30 mAh-class quasi-solid-state pouch cells demonstrated minimal internal resistance change and high charge/discharge capacity.

• Thermal stability tests indicated low heat generation even at temperatures around 150 °C.

This innovation is poised to support the development of safer electric vehicles and cordless devices, potentially contributing to sustainable economic growth. Kido emphasized the importance of creating batteries with extended lifespans as the world shifts towards carbon neutrality.