Thinfilm Achieves Key Milestone in Solid-State Lithium Battery Development


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Thin Film Electronics ASA, a developer of ultrathin, flexible, and safe energy storage solutions for wearable devices and connected sensors, announced the attainment of a critical milestone essential to the production of solid-state lithium battery (SSLB) products in the Company’s San Jose, California manufacturing facility.

The Company can confirm that it has successfully completed the deposition of critical layers of its SSLB stack on Thinfilm steel substrates and initial electrical testing has met and exceeded internal expectations. This achievement reflects substantial development progress, on schedule, supporting the Company’s strategy to deliver premium energy storage with superior volumetric energy density.

Thinfilm SSLB devices are formed through the deposition of lithium-based layers that form the battery’s functional 'stack' and enable charging and discharging of the battery cell. Thinfilm’s unique manufacturing process forms these layers on an ultrathin stainless steel substrate that enables superior performance, robustness, and scalability compared to alternative manufacturing methods.

Results from initial testing of the deposited battery stack have confirmed that Thinfilm’s process is already nearly achieving the maximum entitled energy densities for solid-state lithium batteries. This will enable the Company to deliver differentiated products with higher volumetric energy densities, surpassing existing competing products. Based on this success and despite the logistical and operational challenges introduced by the COVID-19 pandemic, Thinfilm’s technology development team is on track to demonstrate complete SSLB samples by the end of June.

Together with Thinfilm’s earlier announcement of multiple patent filings related to its SSLB technology, these achievements illustrate meaningful progress toward the Company’s commercialization of ultrathin, stackable milliamp-hour battery cells with the highest volumetric energy density in their class, enabling Thinfilm to minimize battery size and extend battery life for thinner, more comfortable wearable devices and connected sensors.

In addition to technical progress, the Company has actively engaged leading OEMs and potential partners to identify market opportunities for Thinfilm SSLB products. Market feedback indicates that superior volumetric energy density, extensive form factor options, higher charge/discharge cycling count, expanded low-temperature operating range, and improved safety can positively differentiate Thinfilm SSLB products from the coin cells and lithium-ion pouch cells currently used by existing products in target markets. Based on these discussions, the Company has identified meaningful opportunities in the wearables and remote patient monitoring market segments that can benefit from Thinfilm’s SSLB technology.

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