Development and scale-up of thin sodium-ion battery cell using bio-based materials for sustainable electronics and roll-to-roll production
| Reference number | |
| Coordinator | Ligna Energy AB |
| Funding from Vinnova | SEK 8 065 747 |
| Project duration | November 2025 - October 2027 |
| Status | Ongoing |
| Venture | Call for proposals - Scaling up the sustainable battery value chain |
| Call | Scaling up for a sustainable battery value chain |
Purpose and goal
The project will develop and scale up a thin, rechargeable sodium-ion battery (SIB) for compact wireless electronics products such as smart building sensors, trackers and IoT devices. The solution addresses the global problem of disposable batteries (lithium coin cells) by providing a rechargeable, bio-based and recyclable alternative. Core activities include electrolyte development, optimization of ultra-thin cell architecture, adaptation of R2R processes and customer demonstration.
Expected effects and result
The outcome is a lithium-free, fluorine-free sodium-ion battery platform for wireless connected applications (often including energy harvesting) - ready for industrialisation in Sweden. It will reduce battery waste, reliance on critical raw materials, and CO₂ emissions while creating a new Swedish value chain for micro-energy storage.
Planned approach and implementation
The project is based on TRL 5 prototypes and Ligna´s semi-automated roll-to-roll (R2R) pilot line with the objective to reach TRL 7. The project is being driven in five customized work packages. Core activities include electrolyte development for a relevant temperature range, optimization of ultra-thin cell architecture, and adaptation of R2R processes. Demonstrators are integrated by Jemac and validated at industrial customers. RISE provides product modeling, simulation, and verification.