To promote the reuse of lithium-ion batteries, we has developed a non-destructive, time-efficient technology for evaluating their safety condition. As a result of these efforts, we have established a method to directly detect lithium metal deposition inside the batteries - one of the key factors contributing to performance degradation and heat generation in used batteries.
By analyzing electronic responses induced by changes in the physical properties of metallic materials, we identified that the “skin effect” - a phenomenon where high-frequency currents concentrate near the edges of the conductor - can be utilized to specifically detect lithium metal deposited on the negative electrode surface.
Building on this principle, we developed a diagnostic technique (MaMoRiS®) that assesses lithium metal deposition by measuring high-frequency current responses.
The outcomes achieved in battery diagnostics indicate potential for broader applications, including condition monitoring of electronic devices and other technological domains.
